%0 Journal Article
%T Effect of nitrogen/phosphorus ratio on biological characteristics and organic acid exudation in soybean roots<br>氮磷比对大豆生物学性状和根系分泌有机酸量的影响
%A MIAO Shu-Jie
%A QIAO Yun-Fa
%A LIU Xiao-Bing
%A <br>苗淑杰
%A 乔云发
%A 刘晓冰
%J 中国生态农业学报
%D 2011
%I 
%X Three nitrogen/phosphorus ratios were designed in a sand culture test to analyze the effect of nitrogen/phosphorus ratio on the biological characteristics and organic acid exudation in the roots of soybean. Biomass and nodulation were investigated and organic acid exudation from the roots of soybean was measured with a high performance liquid chromatography. Results showed that at seedling stage, biomass accumulation in soybean was not affected by phosphorus. Suitable nitrogen levels were needed to maintain efficient nodulation. Low phosphorus increased organic acid exudation by the roots of soybean, which was promoted by high nitrogen content. With regards to root organic acid exudation, a negative interaction was noted between nitrogen and phosphorus.
%K Ratio of nitrogen and phosphorus
%K Soybean root
%K Biological characteristics
%K Biomass
%K High performance liquid chromatography
%K Organic acid
%K Nodulation<br>氮磷比
%K 大豆根系
%K 生物学性状
%K 生物量
%K 高效液相色谱
%K 有机酸
%K 结瘤
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=D7EC4A02BA916E47DBFFBB22CAA7C6C8&yid=9377ED8094509821&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=2EAE52BA5B1222A9&eid=6341CCF6B158C5F9&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=16