Achieving food security for one million sub-Saharan African poor through push-pull innovation by 2020.
Achieving food security for one million sub-Saharan African poor through push-pull innovation by 2020.
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DOI：
10.1098/rstb.2012.0284
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发表时间：
2014-04-05
期刊：
影响因子：
--
通讯作者：
Pickett JA
中科院分区：
文献类型：
--
作者：
Khan ZR;Midega CA;Pittchar JO;Murage AW;Birkett MA;Bruce TJ;Pickett JA
粮食不安全是非洲的一个长期问题，并可能随着气候变化和人口增长而恶化。这主要是由于蛀茎害虫、独脚草和土壤退化等因素造成的谷类作物产量低。一种基于当地现有伴生植物的平台技术“推拉”有效地解决了这些制约因素，从而大幅提高了谷物产量。它包括谷类作物与饲料豆类，山蚂蝗间作，并种植纳皮耶草作为边境作物。山蚂蝗能驱赶蛀茎蛾（推），并吸引它们的天敌，而纳皮耶草则能吸引它们（拉）。山蚂蝗在抑制独脚金杂草方面非常有效，同时通过固氮和提高有机质含量来提高土壤肥力。这两种伴生植物提供高价值的动物饲料，促进牛奶生产，使农民的收入来源多样化。为了将这些好处扩大到干旱地区，并确保该技术在气候变化方面的长期可持续性，正在确定耐旱的陷阱和间作植物。研究表明，当地的商业臂形草（诱捕作物）和绿叶山蚂蝗（间作）可以忍受长期干旱。新的农场田间试验表明，在适应推拉技术中使用这两种伴生作物可有效控制茎螟和独脚草，从而显著提高粮食产量。与国家农业研究和推广系统、非政府组织和其他利益攸关方建立了有效的多层次伙伴关系，以加强技术的传播，目标是到2020年使该区域100万农户受益。这些将得到东非有效的山蚂蝗种子生产和分配系统、相关政策以及利益攸关方培训和能力发展的支持。
Food insecurity is a chronic problem in Africa and is likely to worsen with climate change and population growth. It is largely due to poor yields of the cereal crops caused by factors including stemborer pests, striga weeds and degraded soils. A platform technology, ‘push–pull’, based on locally available companion plants, effectively addresses these constraints resulting in substantial grain yield increases. It involves intercropping cereal crops with a forage legume, desmodium, and planting Napier grass as a border crop. Desmodium repels stemborer moths (push), and attracts their natural enemies, while Napier grass attracts them (pull). Desmodium is very effective in suppressing striga weed while improving soil fertility through nitrogen fixation and improved organic matter content. Both companion plants provide high-value animal fodder, facilitating milk production and diversifying farmers’ income sources. To extend these benefits to drier areas and ensure long-term sustainability of the technology in view of climate change, drought-tolerant trap and intercrop plants are being identified. Studies show that the locally commercial brachiaria cv mulato (trap crop) and greenleaf desmodium (intercrop) can tolerate long droughts. New on-farm field trials show that using these two companion crops in adapted push–pull technology provides effective control of stemborers and striga weeds, resulting in significant grain yield increases. Effective multi-level partnerships have been established with national agricultural research and extension systems, non-governmental organizations and other stakeholders to enhance dissemination of the technology with a goal of reaching one million farm households in the region by 2020. These will be supported by an efficient desmodium seed production and distribution system in eastern Africa, relevant policies and stakeholder training and capacity development.
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DOI：
10.1098/rstb.2005.1744
发表时间：
2005-11-29
影响因子：
6.3
作者：
Fischer, G;Shah, M;van Velhuizen, H
通讯作者：
van Velhuizen, H
影响因子：
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作者：
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通讯作者：
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DOI：
10.1556/aagr.50.2002.2.4
发表时间：
2002-01-01
期刊：
Acta Agronomica Hungarica
影响因子：
--
作者：
Adagba, M. A.;Lagoke, S. T. O.;Imolehin, E. D.
通讯作者：
Imolehin, E. D.
影响因子：
7.3
作者：
Frost, DL;Gurney, AL;Scholes, JD
通讯作者：
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影响因子：
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作者：
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