%0 Journal Article
%T Effect of N, P and K fertilizer combination and application rate on yield of Astragalus sinicus L.<br>氮磷钾肥用量对紫云英产量效应的研究
%A SU Wei
%A LU Jian-Wei
%A LIU Wei
%A CAO Wei-Dong
%A LU Ming-Xing
%A <br>苏 伟
%A 鲁剑巍
%A 刘 威
%A 曹卫东
%A 鲁明星
%J 中国生态农业学报
%D 2009
%I 
%X The effect of nitrogen, phosphorus and potassium fertilization on the yield of Astragalus sinicus L. was investigated in 3414-design fertilization trial. The results show that comparing with no fertilizer treatment (CK), the thirteen fertilization treatments harvest average 21.1 t·hm-2 higher yield, with a yield increase of 135%. Under the fixed combination rates of P25-K2O at 60-60 kg·hm-2, N-K2O at 75-60 kg·hm-2 and N-P25 at 75-60 kg·hm-2, A. sinicus yield significant increase with respective increase in N (N 0~112.5 kg·hm-2), P (P25 0~90 kg·hm-2), K (K2O 0~90 kg·hm-2) application rates. And the highest yield increment rates caused by N, P, K fertilizers are 65.0%, 27.8% and 44.5% respectively. In view of nutrition efficiency, medium application rates of N (N 75.0 kg·hm-2), P (P25 60 kg·hm-2) and a low rate of K (K2O 30 kg·hm-2) are the best application rates. The results also show beneficial interactions among N, P and K. Medium application rates of N (N 75.0 kg·hm-2), P (P25 60 kg·hm-2) and K (K2O 60 kg·hm-2) have synergetic effects on nutrient and yield. The results therefore imply that fertilization significantly increases yield of A. sinicus and different combination and application rates of N, P and K are important factors that influence A.sinicus yield.
%K Astragalus sinicus L
%K 3414-design fertilization trial
%K Fertilization effect
%K N
%K P
%K K interactive effect<br>紫云英
%K "3414"肥效试验设计
%K 施肥效应
%K 肥料交互作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=189DA25438163B5E945144D5CD8F9999&yid=DE12191FBD62783C&vid=BCA2697F357F2001&iid=B31275AF3241DB2D&sid=6B48C3DA6EA0194C&eid=4759DE41370E2E7A&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=2&reference_num=17