%0 Journal Article
%T Influence of water deficit and supplemental irrigation on nitrogen uptake by winter wheat and nitrogen residual in soil<br>缺水与补水对小麦氮素吸收及土壤残留氮的影响
%A WANG Zhaohui
%A WANG Bing
%A LI Shengxiu
%A <br>王朝辉
%A 王兵
%A 李生秀
%J 应用生态学报
%D 2004
%I 
%X Pot experiment in greenhouse showed that water deficit at all growth stages and supplemental irrigation at tillering stage significantly decreased the nitrogen uptake by winter wheat and increased the mineral N residual (79.8-113.7 mg x kg(-1)) in soil. Supplemental irrigation at over-wintering, jointing or filling stage significantly increased the nitrogen uptake by plant and decreased the nitrogen residual (47.2-60.3 mg x kg(-1)) in soil. But, the increase of nitrogen uptake caused by supplemental irrigation did not always mean a high magnitude of efficient use of nitrogen by plants. Supplemental irrigation at over-wintering stage didn't induce any significant change in nitrogen content of grain, irrigation at filling stage increased the nitrogen content by 20.9%, and doing this at jointing stage decreased the nitrogen content by 19.6%, as compared to the control.
%K Water deficit
%K Supplemental irrigation
%K Winter wheat
%K N uptake
%K N residue<br>水分亏缺
%K 补充灌水
%K 冬小麦
%K 氮素吸收
%K 氮素残留
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=C9D8E00776C457AA&yid=D0E58B75BFD8E51C&vid=23CCDDCD68FFCC2F&iid=5D311CA918CA9A03&sid=59D5B0EDB2D8DABC&eid=C91D29281694E9C8&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=12&reference_num=21