干旱地区农业研究2013，Vol.31Issue(3)：127-132,149,7.
保水剂用量对冬小麦生长及水肥利用的影响
Impacts of dosage of water-retaining agent on growth and water and fertilizer utilization of winter wheat
摘要
Abstract
In order to investigate impacts of water-retaining agent on characteristics of growth and water and fertilizer utilization of winter wheat,different dosage of water-retaining agent (T3 ∶ 30 kg· km-2,T4 ∶ 60 kg· km-2,T5 ∶ 90 kg·km-2) combined with nitrogen fertilizer (225 kg· km-2) were tested on winter wheat in a field experiment.Winter wheat growth,soil available nitrogen,water and nitrogen fertilizer utilization were studied and no nitrogen and water-retaining agent (CK) usage was control.The results indicated that application of water-retaining agent and nitrogen fertilizer increased total group number,plant height,leaf area,soil available nitrogen,yield and WUE.The total group number,plant height,leaf area,ear length and grain number per panicle in T4 were higher in other treatments,and leaf area and 1 000 grain mass were increased most in T5.With advancement of wheat growth period,root-shoot ratio of wheat was lower in water-retaining agent treatment than control,especially in T3.The order of average content of soil available nitrogen in various growth of wheat was as follows:T4 ＞ T3 ＞ T5 ＞ T2 ＞ control.With increase of water-retaining agent dosage,wheat yield,nitrogen agronomic efficiency,nitrogen productivity and water use efficiency were first increased and then reduced.All of these parameters were increased most in T4.Compared to single nitrogen treatment (T2),they were increased by 14.5％,55.9％,34.6％ and 25.0％,respectively.In conclusion,T4 had best effect on growth,yield and water and fertilizer utilization of winter wheat compared with other treatments.关键词
保水剂/冬小麦/氮肥/产量/氮素利用率/水分利用效率Key words
water-retaining agent/ winter wheat/ nitrogen fertilizer/ yield/ NUE/ WUE分类
农业科技引用本文复制引用
杨永辉,武继承,李宗军,李学军,何方,侯占领,杨先明..保水剂用量对冬小麦生长及水肥利用的影响[J].干旱地区农业研究,2013,31(3):127-132,149,7.基金项目
国家863节水农业项目"绿色环保多功能保水制剂"(2006AA100215) （2006AA100215）
公益性行业(农业)科研专项经费项目"黄淮海高产农田作物需水及高效用水技术研究与示范"(201203077) （农业）
河南省杰出青年基金项目"保水剂应用对土壤环境的影响研究"(104100510024) （104100510024）
