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首页> 外文期刊>Tropical Science >Yield responses of food crops to animal manure in semi-arid Kenya.
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Yield responses of food crops to animal manure in semi-arid Kenya.

机译：半干旱肯尼亚的粮食作物对动物粪便的产量响应。

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摘要

In field experiments in 1989-93 at 9 sites on the lower eastern slopes of Mount Kenya, pearl millet [Pennisetum glaucum]-green gram [Vigna radiata] and sorghum-cowpeas cropping systems were compared. Crops were grown in Apr. and Nov. Either the cereal crops followed the legumes or vice versa or cereal/legume intercrops were grown during both seasons. The crops received 0, 5 or 10 t goat manure/ha. Yield response to manure application was relatively greater in the cereals than the legumes. Yields and returns from the intercrops were greater than from the sole crops. The marginal yield gain with 10 t manure was substantially less than that from the 5 t rate, and the less popular sorghum-cowpea cropping system gave both higher yields and greater yield responses than the more widespread pearl millet-green gram cropping system. Results were not consistent across all the sites. Of the possible common factors of ecological zone, soil type, site history and soil phosphate status, only the last showed a close relationship, suggesting that available soil phosphate is a key limiting factor in crop production in that area.
机译：在1989-93年肯尼亚山下东部斜坡上的9个地点的田间试验中，比较了珍珠粟[Pennisetum glaucum]-绿克[Vigna radiata]和高粱-w豆的种植系统。作物分别在4月和11月生长。在两个季节中，谷物作物都跟随豆类作物生长，反之亦然，或者谷物/豆类间作作物也生长。作物获得了0、5或10吨山羊粪/公顷。谷物中对粪肥施用的产量响应比豆类高。间作的单产和收益均高于单季作物。施用10吨粪肥的边际增产幅度远低于5吨施用量时的边际增产幅度，相对较普遍的珍珠粟-绿克作物耕作制度，较少使用的高粱-豆种植制度既具有较高的产量，又具有较高的增产响应。所有站点的结果均不一致。在生态区，土壤类型，用地历史和土壤磷酸盐状况的可能共同因素中，只有最后一个表现出密切的关系，这表明可用的土壤磷酸盐是该地区作物生产的关键限制因素。

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