山东农业科学Issue(6)：35-39,5.
地力水平和播期对冬小麦籽粒产量及氮素利用率的影响
Effects of Fertility Level and Sowing Date on Grain Yield and Nitrogen Use Efficiency of Winter Wheat
摘要
Abstract
The cultivar Tainong 18 was sowed on three dates ( conventional sowing on October 8, early sowing on October 1 and delayed sowing on October 15) under low or high fertility level with plant density of 4.05 million/hm2.Under high fertility, higher grain yield but lower nitrogen use efficiency (NUE) was ob-served.Under the same fertility level , properly sowing later could maintain the grain yield equivalent to that of early and conventional sowing through coordinating spikes per unit area and grains per spike .Delayed sowing resulted in lower nitrogen uptake efficiency ( UPE ) but higher nitrogen utilization efficiency ( UTE ) , so the offset led to its equivalent NUE to the other sowing date treatments .Delayed sowing under both low and high fertility level could protect winter wheat from cold damage , so the higher grain yield and NUE could be main-tained.关键词
冬小麦/地力水平/播期/籽粒产量/氮素利用率Key words
Winter wheat/Fertility level/Sowing date/Grain yield/Nitrogen use efficiency分类
农业科技引用本文复制引用
孔海波,肖丽丽,代兴龙,李传兴,王月超,李华英,贺明荣..地力水平和播期对冬小麦籽粒产量及氮素利用率的影响[J].山东农业科学,2014,(6):35-39,5.基金项目
国家重点基础研究发展计划项目（2009CB118602）和国家公益性行业（农业）科研专项（201203096）资助。 （）
