Soyabeans and sustainable agriculture - Promiscuous soyabeans in southern Africa
Soyabeans and sustainable agriculture - Promiscuous soyabeans in southern Africa
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DOI：
10.1016/s0378-4290(99)00083-0
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发表时间：
2000-03-01
影响因子：
5.8
通讯作者：
Giller, KE
中科院分区：
文献类型：
--
作者：
Mpepereki, S;Javaheri, F;Giller, KE
杂交结瘤的大豆品种在非洲南部的大多数土壤中结瘤丰富而有效。不同大豆基因型和不同根瘤菌分离株之间的共生相互作用在结瘤能力和固氮有效性方面差异很大，但所有被测试的植物基因型，包括被认为是高度特异性的品种，在至少一种土壤中与本地分离株结瘤。结瘤的混杂性使大豆能够被引入到一系列缺乏合适接种剂的环境中，否则就会妨碍作物的生长。小农只需要获得种子就可以种植大豆，这带来了多重好处：蛋白质和油脂含量高，改善家庭营养，销售作物获得现金收入，氮素投入可提高土壤肥力，促进种植系统的可持续性。因此，杂交大豆品种是小农种植大豆的一种非常合适的技术，而使用具有更大产量潜力的品种与根瘤菌接种剂是一种适合于有现成农业投入物的农民进行大豆商业化生产的技术。(C) 2000 Elsevier Science B.V.版权所有
Promiscuously nodulating varieties of soyabean have been developed which nodulate abundantly and effectively in most soils in southern Africa. Bred from genotypes collected in East Asia these promiscuous varieties nodulate with fast and slow-growing rhizobia representing several different genera, The symbiotic interaction between different soyabean genotypes and different rhizobial isolates varies widely both in terms of ability to nodulate and effectiveness in N-2 fixation, but all plant genotypes tested, including varieties considered to be highly specific, nodulated with indigenous isolates in at least one soil.Promiscuity in nodulation allows soyabean to be introduced into a range of environments where lack of suitable inoculants would otherwise preclude growing the crop. Smallholder farmers need only access to seed to be able to grow soyabean, which brings multiple benefits in improved household nutrition from the high protein and oil content, cash income from sales of the crop and inputs of N which enhance soil fertility and contribute to the sustainability of their cropping system. Promiscuous soyabean varieties therefore represent a highly appropriate technology for cultivation of soyabeans for smallholder farmers, whereas use of varieties with greater yield potential together with rhizobial inoculants is an appropriate technology for commercial production of soyabeans by farmers who have ready access to agricultural inputs. (C) 2000 Elsevier Science B.V. All rights reserved.