施用氮磷钾肥对紫云英生长·产量的影响

Effects of Nitrogen,Phosphorus and Potassium Fertilizer on Growth and Yield of Astragalus sinicus

[目的]研究不同肥料运筹措施对紫云英生长的影响和增产效果。[方法]通过田间试验,研究氮磷钾肥配合施用对紫云英根瘤数量、鲜草和籽粒产量的影响。[结果]氮磷钾肥对紫云英根瘤数量的影响顺序均为P>K>N。初花期氮磷钾配合施用处理紫云英鲜草产量最高,而盛花期为NP处理最高,氮磷钾肥对鲜草的增产效果为P>K>N。氮磷钾肥对紫云英籽粒产量的影响大小顺序为P>K>N。[结论]增施磷肥是提高紫云英鲜草和籽粒产量的关键。氮肥、钾肥后移对紫云英籽粒产量提高也有一定的作用。

[Objective]The research aimed to study the effects of different fertilization on the growth of Astragalus sinicus and the increase of the yield.[Method]The field experiments were carried out to study the effects of combining application of nitrogen,phosphorus and potassium fertilizer on the amount of root nodule,the fresh weight and the grain yield.[Result]The order of the effects of nitrogen,phosphorus and potassium fertilizer on the amount of the root nodule was PKN.The fresh weight with the combining application of nitrogen,phosphorus and potassium fertilizer reached the highest at the initial bloom stage,and the fresh weight with the combining application of nitrogen and phosphorus reached the highest at the bloom stage.The order of the effects of nitrogen,phosphorus and potassium fertilizer on the fresh weight was PK N.And the order of the effects of nitrogen,phosphorus and potassium fertilizer on the grain yield was PKN.[Conclusion]Appling more phosphorus fertilizer was the key to improve the fresh weight and the grain yield.The technique of N,K application at later growth stage played a certain role in the increase of the grain yield.