摘要
在不同肥力和质地的土壤上,采用田间小区及水泥池栽培试验进行了麦田氮肥利用率的研究。结果表明,高肥力麦田小麦对土壤氮素的依存率很高,氮肥的利用率较低,在设计施氮量范围内,仅为19.0％～7.4％;在中高肥力麦田,小麦对土壤氮素的依存率低,氮肥的利用率较高,达58.8％～36.9％。在供氮水平相近的不同质地土壤中,小麦对氮肥的依存率是以重壤<中壤<轻壤;氮肥利用率在氮肥用量低时相差不大(38.3％～39.3％),随着施氮量的提高,氮肥利用率下降;相同施氮量下,氮肥利用率大小为重壤>中壤>轻壤。
By methods of field trial and cement-pool cultivation, this paper studied the
use efficiencies of N fertilizer in wheat fields with different fertilities and soil textures. The re
sults showed that, in high fertility field, the soil N dependant rate of wheat was very high with
the use efficiency of N fertilizer being very low, only 19. 0% to 7. 4% in certain scale of fertilizer
rates, while in mid-high fertility field, the soil N dependant rate was lower with the use efficien
cy of N fertilizer higher (58. 8% to 36. 9%). In soils with different textures and similar N con
tents, the soil N dependant rates were in the order of heavy loamy<medium loamy<light
loamy, and the use efficiency of N fertilizer was heavy loamy>medium loamy>light loamy un
der the same rates of N fertilizer applied. With the increase of the rates of N fertilizer applied,
the use efficiency of N fertilizer decreased in all the soils tested.
出处
《作物学报》
CAS
CSCD
北大核心
1998年第6期884-88,共1页
Acta Agronomica Sinica
基金
国家"九五"重中之重科技攻关项目
关键词
小麦
土壤肥力
氮肥利用率
Wheat
Soil fertility
Texture
Use efficiency of N fertilizer
