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Legume-based cropping systems for improving soil environments in sub-Saharan Africa
https://doi.org/10.34556/0002000759
https://doi.org/10.34556/000200075974950ecf-1565-4f36-ad1f-414f075a1d3a
| 名前 / ファイル | ライセンス | アクション |
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International_symp2016_-59-72 (847.4 KB)
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| Item type | 国際農研デフォルトアイテムタイプ（フル）(1) | |||||||||
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| 公開日 | 2025-03-19 | |||||||||
| タイトル | ||||||||||
| タイトル | Legume-based cropping systems for improving soil environments in sub-Saharan Africa | |||||||||
| 言語 | en | |||||||||
| その他のタイトル | ||||||||||
| その他のタイトル | サブサハラアフリカにおける土壌環境を改善するマメ類ベースの作付体系 | |||||||||
| 言語 | ja | |||||||||
| 作成者 |
Abaidoo, Robert Clement
× Abaidoo, Robert Clement
× Opoku, Andrews
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| アクセス権 | ||||||||||
| アクセス権 | open access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||
| 主題 | ||||||||||
| 主題 | Biological nitrogen fixation, soil types, grain legumes, nitrogen and phosphorus mining | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Soils in Africa are less resilient for crop production. The soils range from stony and shallow with poor life-sustaining capabilities to deeply weathered soils with inherently poor fertility status. The soils are situated in five major agro-ecological zones depending on the length of the growing period. The agro-ecological zones are humid, semi humid, semi arid, arid and highlands. The dominant soils in these agro-ecological zones are Ferralsols and Acrisols in the humid zones; Ferralsols and Lixisols in sub-humid zones; Lixisols, Arenosols and Nitosols in semi-arid zones and Lithosols in the arid zones. Among these major soils, Ferralsols, Acrisols and Arenosols are laden with severe fertility constraints. Ferralsols have extremely low nutrient retention, low water holding capacity, high P fixation and deficiencies in magnesium, calcium, potassium and molybdenum. Acrisols also have high P fixation, low nutrient retention capacity, as well as boron and magnesium deficiencies. In addition, the structure is weak and internal drainage is poor. Arenosols have low water-holding capacity, low nutrient content, low nutrient-retention capacity, and chronic deficiencies in nitrogen, potassium, sulfur, zinc, manganese, copper and iron. Furthermore, Arenosols are weakly structured and prone to soil compaction. In contrast, Nitosols have good structure and high nutrient retention. Grain legumes such as cowpeas, soybeans, groundnuts and common beans are commonly grown as mono crop, intercrop or in rotation with other crops in the sub-humid and semi-arid zones. The grain legumes have contributed in diverse ways to the restoration and maintenance of soil fertility. Nitrogen is the most limiting nutrient element in the soils of sub-saharan Africa. The contribution of grain legumes to biological nitrogen fixation varied widely depending on the crop, variety and the management practices adopted. Large number of on-farm trials carried out by N2Africa in West, East and Southern Africa showed that the amounts of N fixed were 12 - 266kg N ha-1 by cowpea, 3 - 166kg N ha-1 by soybean, 10 - 124kg N ha-1 by groundnut and 5 - 31kg N ha-1 by common bean. These studies also identified the choice of variety and application of P fertilizers as the key determinants for enhanced biological nitrogen fixation. The choice of an improved variety of cowpea increased N-fixed by 120kg ha-1in one study, while the application of 30kg P ha-1 increased the N-fixed by 58kg ha-1 in another study. Nutrient mining is a widespread soil fertility challenge in Africa. Over the last three decades, nutrient depletion has been estimated at an average of 660kg N ha-1, 75kg P ha-1 and 450kg K ha-1 in 37 African countries. Studies conducted by the International Institute of Tropical Agriculture in 52 farms in northern Nigeria showed that retention of cowpea haulm at a rate of 100kg/ha could reverse N mining within 2 to 54 years and P mining within 2 to 10 years of continuous practice. Undoubtedly, grain legumes are endowed with enormous potentials which, when harness appropriately could propel the attainment of the much needed green revolution in Africa. | |||||||||
| 言語 | en | |||||||||
| 内容記述 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | JIRCAS International Symposium 2016, Session 1: Legumes in agriculture : Sustainability, environment, and development Chair: Satoshi Tobita |
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| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | Japan International Research Center for Agricultural Sciences (JIRCAS) | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||||||
| 資源タイプ | conference presentation | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| ID登録 | ||||||||||
| ID登録 | 10.34556/0002000759 | |||||||||
| ID登録タイプ | JaLC | |||||||||
| 関連情報 | ||||||||||
| 関連タイプ | isPartOf | |||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | https://doi.org/10.34556/0002000749 | |||||||||
| 関連名称 | Legumes Improve Our Livelihood! | |||||||||
| 書誌情報 |
en : JIRCAS International Symposium Proceedings : Legumes Improve Our Livelihood! 巻 2016, p. 59-72, 発行日 2017-02 |
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| 会議記述 | ||||||||||
| 会議名 | JIRCAS International Symposium 2016 : Legumes Improve Our Livelihood! | |||||||||
| 主催機関 | Japan International Research Center for Agricultural Sciences (JIRCAS) | |||||||||
| 開催期間 | 2016-12-02 | |||||||||
| 開催会場 | U Thant International Conference Hall, United Nations University | |||||||||
| 開催国 | JPN | |||||||||
