%0 Journal Article
%T Effect of topdressing time of nitrogen fertilizer and controlled-release coated urea on winter wheat yield and apparent nitrogen recovery rate<br>氮肥追施时期及包膜控释氮肥对冬小麦产量和氮素吸收的影响
%A LI Ruo-Nan
%A WANG Li-Ying
%A ZHANG Yan-Cai
%A LIU Meng-Chao
%A ZHAI Cai-Xia
%A CHEN Li-Li
%A <br>李若楠
%A 王丽英
%A 张彦才
%A 刘孟朝
%A 翟彩霞
%A 陈丽莉
%J 中国生态农业学报
%D 2010
%I 
%X Pot experiments were used to investigate the effect of topdressing time of nitrogen fertilizer and application of controlled-release coated urea on wheat yield, yield component, apparent nitrogen recovery rate and apparent soil nitrogen loss. The results show that jointing stage is the best time for topdressing of nitrogen fertilizer in winter wheat. Compared with 40% basal and 60% topdressing urea (F2) at jointing stage, nitrogen release trend of 30% urea, 35% coated urea with a release time of 90 d, and 35% coated urea with release time of 120 d (F4, F6) mixed basal application is more or less the same as that of plant nitrogen requirement. The total nitrogen accumulation under F4 (with normal N dose) increases by 6.11%, while under F6 (with 75% of normal N dose) increases by 8.48% compared with F2. Wheat yield, economic coefficient and apparent nitrogen recovery rate increase by 5.02%, 6.43% and 10.22% under F4 respectively. Furthermore, apparent soil nitrogen loss decreases. F4 increases yield by improving 1000-grain weight and single spike weight, F6 guarantees the yield through maintaining the grain number per spike.
%K Controlled-release coated urea
%K Topdressing time of nitrogen fertilizer
%K Winter wheat
%K Yield
%K Apparent nitrogen recovery rate
%K Apparent soil nitrogen loss<br>包膜控释尿素
%K 氮肥追肥时期
%K 冬小麦
%K 产量
%K 氮肥利用率
%K 氮素表观损失
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=8C44A4E254475AD3811462365CA7167F&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=0B39A22176CE99FB&sid=CAA7BAE04CB631A1&eid=5D8C08279A19B0D4&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=18