摘要
根据8年田间定位试验资料,按不同降水年份,分别讨论了氮、磷、钾肥在渭北冬小麦上施用的增产效果,进而拟合出氮,磷——产量效应方程,提出了氮、磷肥的合理施用量。结果表明,无论丰水年、平水年,还是干旱年,施用化肥均有一定的增产效果,但增产效果有较大差异。同一降水年份,肥底水平越高,氮磷的合理用量越高。同一肥底上,降水越充足,化肥的合理用量越高。丰水年份,要重施氮肥少施磷肥,干旱年份,要重施磷肥少施氮肥。
Based on 8 years data of field fixed position tests and different rainfallyears,this paper discusses the effect of N,P,K fertilizers upon yield increase in winterwheat thereby to fit N,P and Yield effect equation and suggests the rational applicationof N and P fertilizers. The results indicate that no matter what kind of yields such as richrainfall years,general rainfall years and dry year may be the chemical fertilizer applica-tion has a certain kind of effects upon yield increase,but there is a great difference. Inthe years with the same rainfall,the higher the base fertilizer is,the higher the rationalapplication of N and P fertilizer is. In the same base fortilizer,the higher the rainfall is,the higher the utilization of chemical fertilizer is. In rich rainfall year,attention should bepaid to N fertilizer but less application of P fertilizer. In the dry years,attention shouldbe paid to p fertilizer but less application of N fertilizer.
出处
《干旱地区农业研究》
CSCD
北大核心
1993年第3期20-26,共7页
Agricultural Research in the Arid Areas
关键词
小麦
施肥
化肥
rainfed land winter wheat
rainfall year
fertilizer effects
rational fertilization