%0 Journal Article
%T Effect of sulfate supply level on characteristics of N and S metabolism and on root vigor of corn<br>硫水平对玉米氮、硫代谢特性及根系活性的影响
%A WANG Kongjun
%A HU Changhao
%A DONG Shuting
%A LIU Kaichang
%A LIU Cunhui
%A <br>王空军
%A 胡昌浩
%A 董树亭
%A 刘开昌
%A 刘存辉
%J 应用生态学报
%D 2003
%I 
%X The effects of different sulfate supply level on N and S metabolism and on root vigor of corn were quantitatively studied with Hoagland solution under greenhouse conditions.The results showed that in S deficient solution,root vigor and leaf nitrate reductase (NR) activity significantly rdduced,top root ratio (T/R) increased,and S and N accumulation in tops and roots decreased.The partition of S decreased in roots and incompletely expanded leaves,but increased in senescent leaves and sheaths stems ;while the partition of N increased in roots,but decreased in incompletely and fully expanded leaves.The content of protein,protein N,protein S,and sulfate S significantly reduced, percentage of non protein N increased,inorganic S/total S ratio decreased,and total N/total S ratio increased.The protein N/protein S ratio in tops had no observable changes.but increased significantly in roots,showing that root was a sensitive organ to S deficiency.There was a close relatioinship between protein content and NR activity in S deficiency.Deficient or excessive S supply limited N and S metabolism of corn plant.N/S or inorganic S/total S ratio in roots was a sensitive index to indicate the deficiency of S supply,which was 10.7 or 0.302 under normal condition,respectively.
%K Zea mays
%K L
%K Sulfate supply
%K Nitrogen
%K Metabolism
%K N
%K S interaction
%K Roots vigor<br>硫水平
%K 玉米
%K 硫代谢特性
%K 氮代谢特性
%K 根系活性
%K 供硫
%K N－S交互作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=7298360C848353AF&yid=D43C4A19B2EE3C0A&vid=F3583C8E78166B9E&iid=0B39A22176CE99FB&sid=AC1578C6BB9EBDEF&eid=64963996248CBF47&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=3&reference_num=17