摘要
氮肥和磷钾肥追施试验表明:适量的氮磷钾肥后移不仅能提高产量,且有一定的经济效益。增产幅度和效益的顺序为:氮肥后移>磷肥后移>钾肥后移。氮肥后移适宜比例为50%左右,宜初花期一次追施或初花期、鼓粒期二次追施;30%以上的磷钾肥可后移至初花期追施。生产上应提倡氮肥后移;在基施磷钾肥不足时,还应追施磷钾肥。
The study showed that proper late application of nitrogen （N）,phosphorus （P） and potassium （K） fertilizer could improve yield and economic benefits.The order of yield gain and benefits was NPK.The proper propotion of late N application was 50% of the total,dressing once in early flowering stage or dressing twice in early flowering stage and seed filling stage separately.30% of the total P and K fertilizers could be applied in the early flowering stage.Late N application was strongly recommended,while top dressing of P and K fertilizers was essential for the field with insufficient P and K application at seeding.
出处
《大豆科技》
2011年第5期13-17,共5页
Soybean Science & Technology
基金
淮北市重大科技项目"大豆新品种选育及综合增产技术集成与示范"(2009-01-06)
关键词
夏大豆
氮磷钾
产量
Summer soybean
NPK fertilizers
Yield
