KINDAI UNIVERSITY


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阿部 進アベ ススム

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所属部署名農学部 環境管理学科 / 農学研究科
職名講師
学位博士(農学)
専門土壌学、生態工学、熱帯農学、農村開発学
ジャンル環境/地球環境
コメンテータガイドhttp://www.kindai.ac.jp/meikan/874-abe-susumu.html
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メールアドレスishi5ro[at]hotmail.com
Last Updated :2017/11/22

コミュニケーション情報 byコメンテータガイド

コメント

    土壌学を基礎とした生態工学技術の開発と適用、里山生態系における物質循環と保全・修復、アフリカなど熱帯における持続可能な農業技術の開発などについて研究しています。

学歴・経歴

経歴

  •   2014年, 近畿大学(講師)

研究活動情報

研究分野

  • 農芸化学, 植物栄養学・土壌学

論文

  • 土壌生態系サービスを支える土壌動物の役割(1)土壌動物と上壌生態系サービス, 阿部 進, 日本土壌肥料学雑誌 = Japanese journal of soil science and plant nutrition, 日本土壌肥料学雑誌 = Japanese journal of soil science and plant nutrition, 88, 2, 153, 157,   2017年04月
  • 奈良市近郊のコナラ二次林における主要樹種の立地選好性, 田端 敬三, 白井 佑季, 奥村 博司, 阿部 進, 日本緑化工学会誌, 日本緑化工学会誌, 42, 3, 437, 443,   2017年02月
  • Excessive application of farmyard manure reduces rice yield and enhances environmental pollution risk in paddy fields, Susumu S. Abe, Susumu S. Abe, Seiko Hashimoto, Takayuki Umezane, Takeshi Yamaguchi, Sadahiro Yamamoto, Satoshi Yamada, Tsuneyoshi Endo, Noboru Nakata, Archives of Agronomy and Soil Science, 62, 1208, 1221,   2016年09月01日
    概要:© 2016 Taylor & Francis.The present study examined the effect of excessive application of farmyard manure (FM) on rice production and environmental pollution in paddy fields of Japan. A long-term field experiment was conducted during the period 1976–2006 to examine the trends of rice yield and yield components as affected by the excessive FM application (20 Mg ha−1year−1 containing 110 kg N, 180 kg P2O5, and 320 kg K2O). Rice growth, soil fertility, and surface water quality were also assessed in the final year (2006). The results obtained were compared with those of a conventional practice with recommended doses of inorganic fertilizer (IF), i.e. 85 kg N, 68 kg P2O5, and 53 kg K2O ha−1 year−1, and an unfertilized control (CR). The excessive FM application resulted in a gradual decrease in grain yield, which was mostly explained by the reduction of grain fertility under the luxuriant rice growth. This reduction may have been due to the higher accumulation of soil nutrients such as N, P, and K. Moreover, the excessive FM application increased chemical oxygen demand, total P, and soluble K concentrations in the paddy surface water and their effluent loads compared to the conventional practice with the recommended IF application.
  • 都市近郊二次林におけるコバノミツバツツジ(Rhododendron reticuletum D.Don ex G.Don)の開花の有無に及ぼす要因, 中嶋真希, 田端敬三, 奥村博司, 阿部進, 日本緑化工学会誌, 42, 1, 86‐91,   2016年08月31日
  • Assessing Silicon Availability in Soils of Rice-Growing Lowlands and Neighboring Uplands in Benin and Nigeria, S. S. Abe, S. S. Abe, Y. Yamasaki, T. Wakatsuki, T. Wakatsuki, Rice Science, 23, 196, 202,   2016年07月01日
    概要:© 2016 China National Rice Research Institute.Silicon (Si) is known as a beneficial nutrient in the cultivation of rice, playing a key role in photosynthesis enhancement, lodging resistance and tolerance to various environmental stress. The present study aimed to examine available Si content in both lowland soils (n = 29) and neighboring upland soils (n = 21) collected from Benin and Nigeria and to evaluate the validity of the assessment results through a pot experiment. Our results revealed that the acetate-buffer method predicted Si concentration in rice straw at the harvest stage (R2 = 0.68, P < 0.01) better than the anaerobic-incubation method (R2 = 0.31, P > 0.05), and 76% of the uplands and 38% of the lowlands were deficient (< 50 mg/kg) in acetate-buffer soluble Si. These findings suggest that the Si-deficiency soils prevail across the study area, making rice plants starved for Si and prone to environmental stress.
  • 都市近郊二次林におけるヤマザクラとウワミズザクラの成長に及ぼす環境要因, 田端敬三, 小宅由似, 奥村博司, 若月利之, 阿部進, 日本緑化工学会誌, 41, 4, 448‐458,   2016年05月31日
  • Accumulation of free oxyhydroxides in termite (Macrotermes bellicosus (Smeathman)) mounds and the implications for their dynamics in an African savannah Ultisol, Susumu S. Abe, Soil Science and Plant Nutrition, 62, 127, 132,   2016年03月03日
    概要:© 2016 Japanese Society of Soil Science and Plant Nutrition.ABSTRACT: The present study aimed to assess the dynamics of oxyhydroxides via termite mounds in a tropical savannah of Central Nigeria, where the soils often contain oxyhydroxides as a major component of soil minerals. To this end, the quantities of oxyhydroxides stored in mounds built by Macrotermes bellicosus (Smeathman) were compared to those stored in surface (Ap1) soils, and their turnover rates were estimated. Both the mound wall and nest of M. bellicosus were enriched two- to 10-fold with acidified ammonium oxalate soluble iron (Feo) and aluminum (Alo) and dithionite-citrate-bicarbonate (DCB) soluble iron (Fed) and aluminum (Ald) relative to the adjacent surface soil horizon. These oxyhydroxide contents were positively correlated with the clay content (P < 0.05), suggesting that M. bellicosus preferentially used silicate clay-associated oxyhydroxides for mound construction. The Fed, Ald and DCB-soluble manganese (Mnd) preserved in the M. bellicosus mounds ran up to 112 ± 25.6, 5.72 ± 1.41 and 2.17 ± 0.68 kg ha−1, accounting for 1.91 ± 0.23%, 1.00 ± 0.60% and 0.35 ± 0.09% of the total amount stored in the surface soil horizon, respectively. Furthermore, the estimated turnover rates of Fed, Ald and Mnd were 6.6, 0.33 and 0.14 kg ha−1 year−1, respectively. These findings suggest that the mound-building termites significantly impacted the dynamics of free oxyhydroxides in an African savannah soil.
  • 都市近郊二次林におけるコバノミツバツツジ (Rhododendron reticulatum D. Don ex G. Don) の開花の有無に及ぼす要因, 中嶋 真希, 田端 敬三, 奥村 博司, 阿部 進, 日本緑化工学会誌, 日本緑化工学会誌, 42, 1, 86, 91,   2016年
    概要:奈良市内の都市近郊二次林において,コバノミツバツツジ (Rhododendron reticulatum) の開花を調査し,その影響要因について検討した。その結果,対象個体の樹高と胸高断面積,土壌交換性 K 含量,周辺競争個体との胸高断面積相対比が開花に影響していた。開花の有無を目的変数とする一般化線形モデルでは,1) 対象個体の樹高,2) 土壌交換性K含量,3) 半径3 m圏内の上層木との胸高断面積相対比が説明変数として選択され,予測精度は74.2%と良好であった。また,予測精度上位2つのいずれのモデルにおいても,半径3 m圏内の競争木との胸高断面積相対比が説明変数として選択され,半径3 m 圏内に位置する競争木の管理が本種の開花を促進する上で重要であることが示唆された。
  • 西アフリカの低湿地における参加型水田開発手法, 阿部進, 藤本直也, 若月利之, 農業農村工学会誌, 83, 10, 853, 858,   2015年10月01日
  • Exploring Opportunities for Improving Rice Yield and Income in Inland Valleys of West Africa::The Case of Sawah Adoption in Central Nigeria, ABE Susumu S., TAKAHASHI Ryo, YAMAJI Eiji, WAKATSUKI Toshiyuki, Tropical Agriculture and Development, Tropical Agriculture and Development, 59, 2, 83, 87,   2015年
  • 土壌生態系改変者による鉱物風化作用―ミミズとシロアリに焦点を当てて―, 阿部進, Edaphologia, 93, 29, 37,   2014年03月07日
  • The influence of the mound-building termite (Macrotermes bellicosus) on soil clay mineralogy, Abe Susumu S., Wakatsuki Toshiyuki, Tropics, Tropics, 22, 4, 169, 177,   2014年
    概要:The present study aimed to examine the influence of termites (Isoptera) on soil clay mineralogy. To this end, we analyzed the clay mineralogy in the mound structures of Macrotermes bellicosus (Macrotermitinae) and in the adjacent natural (termite-free) soil horizons along an inland valley toposequence in central Nigeria, and compared them using differential X-ray diffraction approach. The results indicated that: (i) M. bellicosus modified soil clay mineralogy to minor extent regardless of the substantial enrichment of clay particles in the mound structures; (ii) the mound structures generally had a decreased abundance of quartz balanced with an increased abundance of phyllosilicate minerals such as smectite and/or kaolinite when compared with the adjacent near-surface (Ap2) horizons; and (iii) there was a subtle difference in clay mineralogy between the mound wall and the hive in spite of a large disparity in particle-size distribution. These findings suggest that soil clay mineralogy is not linked to the ecological requirements of M. bellicosus and the apparent change in the clay mineralogy in mound structures is caused by the preferential selection of fine soil particles during the mound construction rather than by a preference among clay mineral species.
  • サブサハラ・アフリカにおける土壌肥料学研究の最前線 4.なぜアフリカに水田が必要なのか?アフリカの稲作における土壌肥料学研究入門, 阿部進, 日本土壌肥料学雑誌, 83, 2, 183, 196,   2012年04月05日
  • Soil particle accumulation in termite (Macrotermes bellicosus) mounds and the implications for soil particle dynamics in a tropical savanna Ultisol, Susumu S. Abe, Susumu S. Abe, Takashi Kotegawa, Taisuke Onishi, Yoshinori Watanabe, Toshiyuki Wakatsuki, Ecological Research, Ecological research, 27, 1, 219, 227,   2012年01月01日
    概要:This study investigated the influence of mound-building termites on soil particle dynamics on the land surface and in soil-forming processes by examining the amount of soil particles in mound structures of Macrotermes bellicosus in a highly weathered Ultisol of tropical savanna. Soil particle turnover via the mounds was estimated using particle stock data and soil turnover data from previous studies. A 4-ha study plot with six mounds of relatively uniform shape and size was investigated. Soil mass constituting the mounds was 6,166 ± 1,581 kg mound -1 within which the mound wall and nest body accounted for 5,002 ± 1,289 and 1,164 ± 293 kg, respectively. The mound wall contained a significantly larger amount of clay (252 ± 9.97 g kg -1) balanced with a lower sand content (676 ± 26.5 g kg -1) than in the adjacent surface (Ap1) horizon, (46.4 ± 12.8 g clay kg -1); 866 ± 83.2 g sand kg -1); the nest body had much higher clay content (559 ± 51.0 g kg -1) but less sand (285 ± 79.2 g kg -1) than the mound wall. As a result, the mounds of M. bellicosus accumulated clay of 2,874 ± 781 kg ha -1 (corresponding to 2.52% of clay stock in the Ap1 horizon) along with an estimated clay turnover rate of 169 kg ha -1 year -1. These findings suggest a positive feedback effect from termite mound-building activity on soil particle dynamics in tropical savanna ecosystems: M. bellicosus preferentially use subsoil material for mound construction, resulting in relocation of illuvial clay in the subsoil to the land surface where clay eluviation from the surface soil and its illuviation in the subsoil are major soil-forming processes. © 2011 The Ecological Society of Japan.
  • Nutrient storage in termite (Macrotermes bellicosus) mounds and the implications for nutrient dynamics in a tropical savanna Ultisol, Susumu S. Abe, Susumu S. Abe, Yoshinori Watanabe, Taisuke Onishi, Takashi Kotegawa, Toshiyuki Wakatsuki, Soil Science and Plant Nutrition, 57, 786, 795,   2011年12月01日
    概要:The role of mounds of the fungus-growing termite Macrotermes bellicosus (Smeathman) in nutrient recycling in a highly weathered and nutrient-depleted tropical red earth (Ultisol) of the Nigerian savanna was examined by measuring stored amounts of selected nutrients and estimating their rates of turnover via the mounds. A study plot (4 ha) with a representative termite population density (1.5 mounds ha -1) and size (3.7±0.4m in height, 2.4±0.2m in basal diameter) of M. bellicosus mounds was selected. The mounds were found to contain soil mass of 9249±2371 kg ha -1, composed of 7502±1934 kg ha -1 of mound wall and 1747±440 kg ha -1 of nest body. Significant nutrient enrichment, compared to the neighboring topmost soil (Ap1 horizon: 0-16 cm), was observed in the nest body for total nitrogen (N) and exchangeable calcium (Ca), magnesium (Mg) and potassium (K), and in the mound wall for exchangeable K only. In contrast, available (Bray-1) phosphorus (P) content was found to be lower in both the mound wall and the nest body than in the adjacent topmost soil horizon. Consequently, the mounds formed by M. bellicosus contained 1.71±0.62 kg ha -1 of total N, 0.004±0.003 kg ha -1 of available P, 3.23±0.81 kg ha -1 of exchangeable Ca, 1.11±0.22 kg ha -1 of exchangeable Mg and 0.79±0.21 kg ha -1 of exchangeable K. However, with the exception of exchangeable K (1.2%), these nutrients amounted to less than 0.5% of those found in the topmost soil horizon. The soil nutrient turnover rate via M. bellicosus mounds was indeed limited, being estimated at 1.72 kg ha -1 for organic carbon (C), 0.15 kg ha -1 for total N, 0.0004 kg ha -1 for available P, 0.15 kg ha -1 for exchangeable Ca, 0.05 kg ha -1 for exchangeable Mg, and 0.06 kg ha -1 for exchangeable K per annum. These findings suggest that the mounds of M. bellicosus, while being enriched with some nutrients to create hot spots of soil nutrients in the vicinity of the mounds, are not a significant reservoir of soil nutrients and are therefore of minor importance for nutrient cycling at the ecosystem scale in the tropical savanna. © 2011 Japanese Society of Soil Science and Plant Nutrition.
  • Sawah ecotechnology - A trigger for a rice green revolution in Sub-Saharan Africa: Basic concept and policy implications, S. S. Abe, T. Wakatsuki, Outlook on Agriculture, 40, 221, 227,   2011年09月01日
    概要:The green revolution has yet to be realized in Sub-Saharan Africa (SSA) even 40 years after its success in tropical Asia, suggesting that there was a missing element in the basic principles underlying the Asian green revolution when they were transferred to SSA. The authors argue that this missing element is 'ecotechnology'. Ecotechnology improves the crop growing environment in farmers' fields and enables them to accommodate basic green revolution technologies such as modern varieties, chemical fertilizers and irrigation facilities. The authors focus on sawah ecotechnology, a sustainable rice production technology. The term 'sawah' refers to a levelled, bunded and puddled rice field under controlled submergence, and 'sawah ecotechnology' indicates the technology for designing, developing and managing the sawah system. The sawah system development potential is at least 20 million ha in the West Africa (WA) subregion only. Realizing this potential, WA can sustainably produce food for more than 300 million people, as well as enabling the conservation and restoration of hundreds of millions of hectares of upland forests, contributing to carbon sequestration and global warming mitigation in the future.
  • Soil fertility potential for rice production in West African lowlands, Susumu S. Abe, M. Moro Buri, Roland N. Issaka, Paul Kiepe, Toshiyuki Wakatsuki, Japan Agricultural Research Quarterly, 44, 343, 355,   2010年10月01日
    概要:In this paper, we review the soil fertility characteristics and the nature of material in the West African lowlands in comparison with paddy soils in tropical Asia to examine their potential for rice cultivation. Soil samples collected from major lowland ecosystems, i.e., inland valleys (185 locations) and flood plains (62 locations), in 13 countries (Benin, Burkina Faso, Cameroon, Cote d'Ivoire, Ghana, Guinea, Niger, Nigeria, Liberia, Mali, Senegal, Sierra Leone, and Togo) generally show low values of pH, total C and N, available (Bary-2) P, exchangeable Ca and Mg, effective cation exchange capacity (ECEC), and clay content. These properties of the 87 topsoil samples selected from 247 collected samples are well associated with mineralogical composition. The clay and primary minerals predominantly consist of kaolinite and quartz, respectively, which suggests that the lowland soils in the region have low nutrient-holding capacity and a limited potential for inherent nutrient supply. In general, soil pH, available P, exchangeable bases (Ca, Mg, K, and Na), and ECEC decrease while total C, total N and exchange acidity (Al and H) increase with increasing rainfall. This tendency is mostly explained by the enhanced biomass production and soil weathering sequence governed by the climate. In terms of rice production, the lowland soils in West Africa have lower values of general fertility parameters and poorer mineralogical characteristics compared to paddy soils in tropical Asia, which includes Bangladesh, Cambodia, India, Indonesia, Malaysia, Myanmar, Philippines, Sri Lanka, and Thailand. In addition, deficit levels of S and Zn for rice production are widely observed in the lowland soils in West Africa. These findings suggest that soil fertility characteristics show substantially less potential for rice production in West Africa than in tropical Asia.
  • Agronomic and environmental performance of rapeseed oilcake in the lowland rice farming of Japan, S. S. Abe, S. Hashimoto, T. Umezane, T. Yamaguchi, S. Yamamoto, S. Yamada, T. Endo, N. Nakata, Communications in Soil Science and Plant Analysis, 41, 1944, 1958,   2010年09月17日
    概要:The use of organic manures as an alternative to chemical fertilizers is an option for the development of sustainable farming systems in Japan. The present study examined the effect of rapeseed oilcake (RO) not only on yield and yield components of rice (Oryza sativa L.) but also on soil fertility parameters and surface water quality in a paddy field by comparing them with the effects of conventional inorganic fertilizer (IF) and a control (CR), that is, natural (unfertilized) system. The long-term field experiment from 1990 to 2006 demonstrated the indigenous sustainability of paddy systems, because husked grain yield and shoot biomass in the CR plot remained at moderate levels (ave. 323 ± 56 g m-2 and 843 ± 166 g m-2, respectively) over 17 successive years. Meanwhile, the application of RO comparatively improved grain yield (ave. 538 ± 83 g m-2) and shoot biomass (ave. 1478 ± 187 g m-2) to almost the same level as with IF (ave. 538 ± 68 g m-2 and 1511 ± 173 g m-2, respectively) during the study period. Soil fertility assessment in the last experimental year (2006) indicated that RO could improve the soil quality to the same extent as IF because major fertility parameters showed similar values between the RO and IF plots. On the other hand, the application of IF induced a substantial increase in estimated load outflows of nitrogen (N) and phosphorus (P) from the paddy surface water (2.46 g N m-2; 0.38 g P m-2) as compared to the CR plot (0.92 g N m-2; 0.06 g P m-2). Outflows from the RO plot showed relatively lesser effluent loads (2.00 g N m-2; 0.14 g P m-2) than the IF plot. From the findings of this study, we concluded that RO is agronomically similar to but an environmentally better resource material than conventional IF in the lowland rice farming system in Japan. © Taylor & Francis Group, LLC.
  • Possible influence of termites (Macrotermes bellicosus) on forms and composition of free sesquioxides in tropical soils, Susumu S. Abe, Toshiyuki Wakatsuki, Pedobiologia, 53, 301, 306,   2010年08月01日
    概要:There has been less concern about soil mineralogical alteration than about soil physical, chemical and biological changes induced by termite nest-building activity. Furthermore, much less attention has been paid to free sesquioxides than to phyllosilicate minerals. In the present study, we conducted field morphological observations and selective dissolution analysis to characterize free sesquioxides in termite (Macrotermes bellicosus) mounds as compared with surrounding pedons in different toposequence positions, i.e., seasonally flooded valley bottom, hydromorphic fringe and well-drained upland sites. Distinctive redoximorphic features, such as surface yellowish layers on mound structures from the fringe site, indicate possible alteration of iron sesquioxide forms in the mounds due to the transportation of soil from reductive (aquic subsoil) to oxidative (epigeal mound) environments by the nest-building activity of M. bellicosus. On the other hand, the iron-soluble content in the dithionite-citrate-bicarbonate (DCB) system (Fed) was generally higher in the mound structures than at the adjacent sub-surface (Ap2) horizon at each toposequence position, while there was less difference in the content of acid ammonium oxalate (AAO) extractable iron (Feo) as compared to Fed. As a consequence, the iron activity index (Fed/Feo ratio) was found for the most part to be lower in the mound structures than in the neighboring Ap2 horizon. In addition, the content of Fed, AAO-soluble Al (Alo) and DCB-extractable Al (Ald) was significantly correlated with clay content in these soils. These findings suggest that M. bellicosus preferentially collects clay particles, probably from the clay-rich subsoils, such as the argillic horizon, which has been formed by the co-migration of phyllosilicate minerals and relatively crystalline sesquioxides. The species then likely incorporates them into the mounds, which induces an increase in the Fed content relative to that of Feo, resulting in a decreased iron activity index in the mound structures. © 2010 Elsevier GmbH.
  • Traditional farmer-managed irrigation system in central Nigeria, Regina H Y Fu, Susumu S. Abe, Toshiyuki Wakatsuki, Makoto Maruyama, Japan Agricultural Research Quarterly, Japan Agricultural Research Quarterly: JARQ, 44, 1, 53, 60,   2010年01月01日
    概要:This paper examines the characteristics of a traditional farmer-managed irrigation system in Nigeria, through the presentation of a detailed case study. It documents the development of a traditional irrigation system in the inland valley of the Bida region in central Nigeria and the features of its operation and management. The physical structure and the composition of system users were surveyed in detail. In addition, the characteristics of community management of several irrigation systems in the region were investigated. Farmers were able to mobilize necessary local resources for irrigation development and maintenance although they did this without any external support. The irrigation management institution in the area was highly linked to the local land tenure system. The involvement of landlords in the irrigation community greatly affected the performance of irrigation management. There was no clear definition of water rights. In times of water shortage, water was rotated and shared but water scrambling had become a severe problem in recent years with the higher demand for off-season crops. Irrigation communities were organized informally without tiers of nested organizations. Unfairness in water distribution and contribution to system maintenance existed between top-enders and tail-enders of irrigation canals. Nevertheless, the multi-layered and fragmented land ownership of the region made coordination among different irrigation communities difficult and the unfairness problem could not be solved without institutional changes.
  • Erratum: Effects of land-use change on chemical composition of soil organic matter in tropical lowland Bolivia (Grassland Science (2009) vol. 55 (104-109)), Susumu S. Abe, Susumu S. Abe, Carsten W. Mueller, Markus Steffens, Angelika Koelbl, Heike Knicker, Ingrid Koegel-Knabner, Grassland Science, 55, 174,   2009年08月31日
  • Physicochemical and morphological properties of termite (Macrotermes bellicosus) mounds and surrounding pedons on a toposequence of an inland valley in the southern Guinea savanna zone of Nigeria, Susumu S. Abe, Sadahiro Yamamoto, Toshiyuki Wakatsuki, Soil Science and Plant Nutrition, 55, 514, 552,   2009年08月01日
    概要:Termites play a significant role in soil-forming processes of the tropics. The influence of termites on pedogenesis as affected by the toposequence, however, has rarely been explored. We investigated the soil physicochemical and morphological characteristics of epigeal mounds constructed by Macrotermes bellicosus (Smethman) compared with those of surrounding pedons along a toposequence (bottom, fringe and upland sites) of an inland valley in central Nigeria. The physicochemical and morphological properties of the mound soils varied according to structural units but were generally different from those of the adjacent pedons. The differences included finer texture, higher electrical conductivity, total N, exchangeable bases (Ca, Mg and K) and effective cation exchange capacity and lower C/N ratio and exchange acidity in the mound than the pedon at each toposequence position. This tendency to modify the soil properties was more prominent in the nest body where the termites actually live, that is, in the hives, royal cell and base-plate, than in the soils below the nest and the other mound parts, that is, the external wall, internal wall and pillars. We found this trend to a greater or lesser degree at all toposequence positions. Our findings suggest that: (1) M. bellicosus can manipulate the mound soils according to functional applications of structure units or environmental requirements for its livelihood, regardless of local soils; (2) M. bellicosus makes ecological patches (hot spots) at all toposequence positions in the same measure; (3) the influence of M. bellicosus on the pedogenesis is reduced in the lowlands compared with the uplands because the number and volume of the mounds were substantially lower in the bottom and fringe sites compared with the upland site. © 2009 Japanese Society of Soil Science and Plant Nutrition.
  • Soil Development and Fertility Characteristics of Inland Valleys in the Rain Forest Zone of Nigeria: Mineralogical Composition and Particle-Size Distribution, S. S. ABE, S. S. ABE, G. O. OYEDIRAN, T. MASUNAGA, S. YAMAMOTO, T. HONNA, T. WAKATSUKI, Pedosphere, 19, 505, 514,   2009年08月01日
    概要:The particle-size distribution and mineralogical composition of the clay (< 2 μm) and fine-sand (0.25-0.10 mm) fractions in soils of two inland valleys in Abakaliki and Bende, Southeast Nigeria, were investigated to provide basic information on soil-forming processes and agricultural potentials. These soils were silty or clayey, deriving from Cretaceous or Tertiary shale materials. The particle-size distribution and its computation on a clay-free basis revealed relatively remarkable lithologic breaks in a couple of pedons. The effect of lithologic discontinuities on soil mineralogical composition was not, however, conspicuous. Petrographic investigation revealed that quartz predominantly comprised the fine-sand fraction in the soils at both study sites. Nevertheless, the clay mineralogical composition of the soils was a mixture of kaolinite, irregularly interstratified smectite-illite intergrades (S/I), hydroxyl-Al interlayered 2:1 type clays (HICs), vermiculite, smectite, halloysite and illite along with fine-sized quartz in Abakaliki. The soils of Bende predominantly contained smectite, which was partially interlayered with hydroxyl-Al and kaolinite. It is suggested that seasonal floodwater has slowed the disintegration of weatherable clay minerals inherited from the shale, while quartz originating from the sandstone is predominant in the fine-sand fraction. Additionally, a possible soil-forming process observed at the both study sites was ferrolysis, which was indicated by a clear decreasing pattern of HICs downward in the soil profiles. The entry of S/I and vertical distribution patterns for a couple of clay minerals in the pedon suggested that the soils in Abakaliki have developed under the significant influence of aeolian dust delivered by the Harmattan. The findings might describe a site-specific deposition pattern of Harmattan dusts as well as hydromorphic soil-forming processes in the wetlands of the inland valleys. © 2009 Soil Science Society of China.
  • Soil-particle selection by the mound-building termite Macrotermes bellicosus on a sandy loam soil catena in a Nigerian tropical Savanna, Susumu S. Abe, Sadahiro Yamamoto, Toshiyuki Wakatsuki, Journal of Tropical Ecology, 25, 449, 452,   2009年07月01日
  • Effects of land-use change on chemical composition of soil organic matter in tropical lowland Bolivia, Abe Susumu S., Mueller Carsten W., Steffens Markus, KOELBL Angelika, KNICKER Heike, KOEGEL-KNABNER Ingrid, Grassland science, Grassland science, 55, 2, 104, 109,   2009年06月01日
  • Land-use effects on soil macro- and micronutrient status in tropical lowland zone of Bolivia, Abe Susumu Shin, Yamamoto Sadahiro, Masunaga Tsugiyuki, ENDO Tsuneyoshi, WAKATSUKI Toshiyuki, HONNA Toshimasa, Grassland science, Grassland science, 53, 1, 33, 38,   2007年05月01日
  • Soil development and fertility characteristics of inland valleys in the rain forest zone of Nigeria: Physicochemical properties and morphological features: Original article, Susumu S. Abe, Susumu S. Abe, Gbade O. Oyediran, Sadahiro Yamamoto, Tsugiyuki Masunaga, Toshimasa Honna, Toshiyuki Wakatsuki, Soil Science and Plant Nutrition, 53, 141, 149,   2007年04月01日
    概要:Inland valleys are a widespread topography in West Africa and have significant potential for agricultural development, especially wet rice cultivation. This study investigated the physicochemical and morphological properties of the soils of two inland valleys in Abakaliki and Bende, Southeast Nigeria, where the soils are derived from shale materials, and discusses their agricultural potential as well as the soil-forming process. Particle size analysis suggested that the soils at both sites were fine-silty, fine-loamy or clayey and, thus, would be able to retain a high amount of water. In contrast, the higher content of clay and silt in the Abakaliki soils would enhance much more water retention than the Bende soils. The soils in Abakaliki, except for some subsoil horizons, generally had acidic reactions, low contents of exchangeable bases (Ca, Mg, K and Na) and high amounts of exchangeable acidity (Al and H) for which leaching effects under high precipitation in the area would be implicated. Bray-1 P values in these soils were generally low under such acidic conditions, while organic C and total N were recorded at relatively high levels, in particular at the surface horizons, reflecting large biomass production under a humid climate. The Bende soils showed similar chemical properties to Abakaliki except for relative accumulation of exchangeable bases throughout the profile on the downslope possibly because of the rolling topography. This result suggested that geological fertilization (i.e. afflux of nutrients released during the soil formation in the upland into the lowland) was more beneficial in Bende than Abakaliki. From the findings of the present study, we concluded that soils in both Abakaliki and Bende had good texture for sawah development (leveled and bounded rice field with an inlet and an outlet for irrigation and drainage), but their poor chemical properties would be constraints for agricultural production. © 2007 Japanese Society of Soil Science and Plant Nutrition.
  • Primary Mineral Characteristics of Topsoil Samples from Lowlands in Seven West African Countries, 阿部 進, OYEDIRAN Gbade O., 増永 二之, 山本 定博, 本名 俊正, 若月 利之, 熱帯農業, 熱帯農業, 51, 1, 35, 39,   2007年
  • Soil profile alteration in a brown forest soil under high-input tea cultivation, Susumu Shin Abe, Ikuya Hashi, Tsugiyuki Masunaga, Sadahiro Yamamoto, Toshimasa Honna, Toshiyuki Wakatsuki, Plant Production Science, Plant Production Science, 9, 4, 457, 461,   2006年11月06日
  • Comprehensive assessment of the clay mineralogical composition of lowland soils in West Africa, Susumu Shin Abe, Tsugiyuki Masunaga, Sadahiro Yamamoto, Toshimasa Honna, Toshiyuki Wakatsuki, Soil Science and Plant Nutrition, 52, 479, 488,   2006年08月01日
    概要:The clay mineralogical composition of 87 topsoil (0-15 cm) samples from inland valleys (IVs) and flood plains (FPs) in seven West African countries, namely Côte d'Ivoire, Ghana, Guinea, Mali, Niger, Nigeria and Sierra Leone, was examined using X-ray diffraction analysis to gain basic information for the development of sustainable lowland agriculture in the region. The results of the present study revealed that the clay fraction (< 2 μm) of these samples consisted of 68.4% of 7 Å minerals (low-activity clays such as kaolin minerals), 26.6% of 14 Å minerals (relatively high-activity clays such as smectite and vermiculite) and 5.1% of 10 Å minerals (illite or clay micas) and showed a high variability in the composition. With respect to the soil material classification based on the relative abundance of these three types of minerals, Type 7 (rich in 7 Å minerals) accounted for 42.5% of the total samples, while 39.7% of all the samples were Type 7-10 and 7-14 with a predominance of 7 Å minerals and with negligible amounts of 10 and/or 14 Å minerals, respectively. Type 14-7 accounted for 17.2% of the total samples and was only recorded in Nigeria. The other clay mineral types (i.e. Types 7-10-14, 14, 10, 10-7, 10-14 and 14-10) that were composed mainly of 10 and/or 14 Å minerals were hardly found in the West African lowland soils, whereas Types 14 and 7-10-14 were observed in a vertic soil of Southeast Ghana and in northern Ghana, respectively. In contrast, no significant differences in the clay mineralogical composition were found between the IV and FP soils. Geographical distribution of the soil types showed that the soils in the eastern part of West Africa contained more 14 Å and 10 Å minerals than those in the western part. Although the effect of agroclimatological differences was not conspicuous, soils in the Sahel and Sudan savanna zones showed a higher percentage of 14 Å clay minerals than those in the Guinea savanna and equatorial forest zones. The findings were as follows: (1) the low fertility status of the lowland soils in the region was closely associated with their poor mineralogical characteristics (i.e. predominance of 1:1 type clay minerals and a lower amount of 2:1 type clay minerals), (2) no significant differences in the mean clay mineralogical composition were observed between the IV and FP soils, indicating that the lower fertility of the IV soils mainly resulted from the lower clay content, (3) the clay mineralogy of the West African lowland soils was more strongly influenced by the nature of the parent materials than by the climatic conditions and relief. © 2006 Japanese Society of Soil Science and Plant Nutrition.