【作者】 王红梅； 孙启忠；

【Author】 WANG Hong-mei;SUN Qi-zhong;Grassland Research Institute CAAS;

【机构】 中国农业科学院草原研究所；

【摘要】 探讨了氮、磷、钾的施肥量与配比及不同种植密度与肥料组合对苜蓿产草量的影响。结果表明,施肥对阿尔冈金具有明显的增产效果。在单种种肥中,增产效果尿素>二铵>磷肥;在二种肥料组合中,增产效果尿素+二铵>尿素+磷肥>二铵+磷肥;三种肥料组合的增产效果最好,最适当施肥配比为尿素:二铵:磷肥=3:4.5:4.5。在试验范围内,甘农3号和WL232的最高产草量施肥组合与播种量(kg/亩)为尿素(5)+二铵(25)+P(45)+K(20)和1.4;中苜1号和WL323最高产草量施肥组合与播种量(kg/亩)为尿素(3)+二铵(15)+P(30)+K(10)和1.4。更多还原

【Abstract】 The effects of N,P and K fertilizers on the yield of alfalfa under the ratio of fertilizer,different planting density and fertilizer combinations were studied in this article.The results indicated that the proper fertilization could improve the yield of Medicago varia Martin.cv.Algonquin obviously.In single seed manure,the order of effect in yield increase was urea > diammonium > P;In the combinations of two fertilizers,the order of effect in yield increase was urea+diammonium > urea+P> diammonium+P;The combinations of three fertilizers was the best one(urea:diammonium:P=3:4.5:4.5).In the experimental field under same nutritional condition,the most suitable fertilizer combinations and seeding rate of Gannong No.3 and WL232 was urea(5)+diammonium(25)+P(45)+K(20) and 1.4;In the same way,Zhongmu No.1 and WL323:urea(3) +diammonium(15) +P(30)+K(10) and 1.4.更多还原