水肥协同效应对沙打旺吸收氮磷钾的影响  

Effect of Moisture and fertilizer Coordination Upon Astragalus adsurgens for N,P,K Absorption

作　　者：贾恒义[1] 穆兴民[1] 雍绍萍 

机构地区：[1]中国科学院水利部水土保持研究所

出　　处：《干旱地区农业研究》1996年第4期17-21,共5页Agricultural Research in the Arid Areas

基　　金：国家"七五"攻关项目

摘　　要：通过盆栽试验研究了沙打旺水肥协同效应对Ｎ、Ｐ、Ｋ吸收的影响，结果表明：Ｎ地上，整体水分平均主效应和交互效应为肥料效应的２．００，２．５７倍；Ｐ地上几乎相等；Ｋ地上分别是２．４４、２．７０倍。就Ｎ∶Ｐ∶Ｋ的比例而言。地上１．００∶１．３０～１．８３∶８．２０～１３．３７；总体１．００∶１．３４～１．６６∶７．３１～８．８８。虽然水肥都有增加Ｎ、Ｐ、Ｋ吸收的效果，但在高水分时均为抛物线型增加。从增加Ｎ、Ｐ、Ｋ的绝对量来说。The effect of moisture and fertilizer coordination upon A.adsurgens for N,P,K absorption was studied through pot experiments.The results show that in land surface and total,the mean positive effect and interactions of moisture of N is 2.00 and 2.57 times as much as the effect of fertilizer;that of P is nearly equal;and that of K is 2.44 and 2.70 times as much.The proportion of N,P and K is 1.00∶1.30～1.83∶8.20～13.37 in land surface and 1.00∶1.34～1.66∶7.3～8.88 in total.Although water and fertilizer have the effect to improve N,P,K absorption,the increase takes up the type of parabola at the higher moisture without any treatments.As to an increase in N,P K absolute quantities,it is suitable to control moisture in the range of 0～1.

关 键 词：水肥协同效应 养分吸收 沙打旺 

分 类 号：S543.901[农业科学—作物学]