摘要
在充足底墒播后不灌水条件下,进行了适当晚播(10月15日播)与超晚播条件下的小麦肥料试验。主要结果为:(1)播后不灌水条件下超晚播减产严重,主要是单位面积总粒数下降太多,通过适当提高穗密度难以补偿;(2)高施磷条件下(施磷二铵450kg/hm2),随施氮量的增加,开花前的耗水量没有增加,而灌浆期的耗水量则随氮肥用量增加而增加;(3)控制花前无效生长,降低花前耗水,优化开花后的群体结构,提高灌浆期的灌浆强度是降低总耗水、提高水分利用效率的基本途径。
Under the condition of sufficient soil moisture content before sowing and no irrigation after sowing, the effect of fertilization on winter wheat was studied with 2 planting dates of Oct. 15 and Nov. 1. The main conclusions are: (1) When there is no irrigation after planting, yield reduction due to late planting is significant because of sharp reduction of total grain number in unit area; (2) When phosphate fertilization is adequate, water consumption is stable before flowering and increased during filling stage with the increase of amount of N fertilization; (3) The main principle for improvement of WUE is control of water consumption by depressing depression of trivial growth before flowering and improving grain filling ear number in unit area.
出处
《干旱地区农业研究》
CSCD
北大核心
2003年第4期78-83,共6页
Agricultural Research in the Arid Areas
基金
北京市新星计划(H020821340130)
关键词
小麦
生长发育
产量
耗水
肥料
播期
节水模式
fertilization
sowing date
water-saving conservation
winter wheat
