%0 Journal Article
%T Response of water use of winter wheat at different growth stages tonitrogen fertilizer and water-retaining agent<br>冬小麦不同生育阶段水分利用对保水剂与氮肥的响应*
%A YANG Yong-Hui
%A WU Ji-Cheng
%A WU Pu-Te
%A HUANG Zhan-Bin
%A HE Fang
%A YANG Xian-Ming
%A <br>杨永辉
%A 武继承
%A 吴普特
%A 黄占斌
%A 何 方
%A 杨先明
%J 中国生态农业学报
%D 2012
%I 
%X A field experiment was conducted to determine the water use characteristics of winter wheat at different growth stages under application of water-retaining agent (60 kg·hm -2) and nitrogen fertilizer 0, 225 kg(N)·hm-2, and 450 kg(N)·hm -2]. The field experiment investigated soil moisture, winter wheat biomass accumulation, water use at different growth stages as affected by wa-ter-retaining agent and nitrogen fertilizer. The results indicated that soil moisture, biomass accumulation, yield and water use effi-ciency (WUE) of winter wheat increased after water-retaining agent and nitrogen fertilizer application. Compared with other treat-ments, soil moisture under treatments of 450 kg(N)·hm -2 of nitrogen fertilizer, 60 kg·hm -2 of water-retaining agent, and 60 kg·hm-2 of water-retaining agent plus 450 kg(N)·hm -2 nitrogen fertilizer increased. There was a significant increase in the accumulation of above-ground winter wheat dry-matter with increasing nitrogen application rate without water-retaining agent. However, winter wheat dry-matter accumulation decreased under water-retaining agent plus excessive nitrogen fertilizer treatment. Winter wheat dry-matter biomass increased from jointing to harvest and the increase was more obvious at the later growth stage under wa-ter-retaining agent with 225 kg(N)·hm-2 nitrogen fertilizer treatment. From sowing through jointing, booting and grain-filling stages, WUE was boosted by increased nitrogen fertilizer application rate. WUE increased significantly under water-retaining agent plus nitrogen fertilizer treatment. Also from grain-filling to harvest, WUE increased by 53.8% and 57.8% over the control (CK) under 450 kg(N)·hm-2 nitrogen fertilizer and water-retaining agent plus 225 kg(N)·hm-2 nitrogen fertilizer treatments, respectively. In conclu-sion therefore, the yield and WUE of winter wheat increased and with the best effect under 60 kg·hm-2 water-retaining agent plus 225 kg(N)·hm-2-2 nitrogen fertilizer application.
%K Water-retaining agent
%K Nitrogen fertilizer
%K Winter wheat
%K Growth stage
%K Soil moisture
%K Yield
%K Water use efficiency<br>保水剂
%K 氮肥
%K 冬小麦
%K 生育阶段
%K 土壤水分
%K 产量
%K 水分利用效率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=F6F80FAD71E363AEEC6049A5916B69C3&yid=99E9153A83D4CB11&vid=A04140E723CB732E&iid=DF92D298D3FF1E6E&sid=68BCD01D0D745EB3&eid=117143DBED3B4430&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=0