Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea
Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea
复制标题
接种剂、磷肥和有机肥配施提高豇豆籽粒产量
DOI：
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发表时间：
2020
影响因子：
2.4
通讯作者：
C. Masso
中科院分区：
文献类型：
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作者：
J. Ulzen;R. Abaidoo;N. Ewusi;C. Masso
草原土壤中低浓度的磷和有机肥限制了豇豆对根瘤菌的反应。2015年，在加纳北方的小农户农田中，采用完全随机区组设计的析因试验，确定了磷和有机肥对豇豆根瘤菌反应的综合影响。试验因素为两个接种量水平、两个施磷量水平、三个有机肥处理（肥田、牛粪和不施肥）。在P和肥力土壤中添加慢生根瘤菌接种剂显著增加了地上部生物量产量，从未接种慢生根瘤菌的地块的1677 kg ha−1增加到1913 kg ha−1。同样，在P和牛粪中添加慢生根瘤菌接种剂显著增加了地上部生物量，从1437 kg ha−1增加到1813 kg ha−1。当向慢生根瘤菌接种剂中分别加入肥料土或牛粪和P时，谷物产量比对照分别增加1427和1278 kg ha−1。在磷肥和肥力土壤中添加慢生根瘤菌接种剂的价值成本比为2，这表明它对规避风险的小农具有吸引力。研究表明，有机质和磷的结合应用，以提高豇豆接种慢生根瘤菌的反应的潜力。
ABSTRACT Low concentrations of P and organic manure in savanna soils limit cowpea response to rhizobia. The study was conducted to determine the combined effect of P and organic manure on cowpea response to rhizobia in a factorial experiment arranged in randomized complete block design with three replications on smallholder farmers’ fields in northern Ghana in 2015. The factors were two levels of Bradyrhizobium inoculant, two levels of P fertilizer, three treatments of manure (fertisoil, cattle manure, and no manure). Addition of Bradyrhizobium inoculant to P and fertisoil significantly increased shoot biomass yield from 1677 kg ha−1 in the plots without Bradyrhizobium inoculation to 1913 kg ha−1. Likewise, the addition of Bradyrhizobium inoculant to P and cattle manure significantly increased shoot biomass from 1437 kg ha−1 to 1813 kg ha−1. Grain yield increases of 1427 and 1278 kg ha−1 were obtained over the control when either fertisoil or cattle manure and P, respectively, were added to Bradyrhizobium inoculant. The value cost ratio for adding Bradyrhizobium inoculant to phosphorus and fertisoil was two indicating that it could be attractive to risk-averse smallholder farmers. The study demonstrated the potential of the combined application of organic matter and P to improve cowpea response to Bradyrhizobium inoculation.