沙打旺、苜蓿对氮磷钾的效应  

EFFECT OF ASTRAGALUS ADSURGENS AND MEDICAGO SATIVA ON N. P. K

作　　者：贾恒义[1] 彭祥林[1] 雍绍萍[1] 穆兴民[1] 程积民[1] 

机构地区：[1]中国科学院水利部西北水土保持研究所

出　　处：《草业科学》1994年第5期42-45,共4页Pratacultural Science

基　　金：中国科学院院长基金

摘　　要：通过沙打旺、苜蓿对氮、磷、钾肥的效应研究表明：氮肥对它们均为负效应；磷肥均有显著的正效应，而且第二年明显高于第一年，其幅度备异；氮磷，氮磷钾配合的效应并不高于磷素的增产效应。磷，氮磷和氮磷钾处理对二年后沙打旺干：鲜比有所降低，而干叶：干茎比有所提高；对二年生苜蓿干：鲜比有所提高，干叶：干茎比有所降低。Throuth study on effect of A. adsurgens and M. Stativa on N. P. K,the result showed that nitrogenous fer-tilizer was negative effect on them phosphoric fertilizer was sign ificant positive effect.And the effect wasgreater in the first year than the second year.Using P,N一P and N一P一K treating A. adsurgens of the sec-ond growth year,rate of dry:fresh decreased,but dry leaf :dry stem increased;However, for M. sativa ofthe second growth year,rate of dry:fresh increased.rate of dry leaf:dry stem decreased.The yield wasnot greater in N一P and N一P一K combied than P singly applied.

关 键 词：沙打旺 苜蓿 氮磷钾肥 施肥 肥料 

分 类 号：S541.906.2[农业科学—作物学]