摘要
研究了不同肥料配比对小麦的增产效果和小麦叶片氮磷钾含量的影响,运用统合诊断(DRIS)法重点对不同肥料配比下小麦体内营养平衡状况进行了探讨。结果表明:(1)豫西旱地小麦的需肥顺序为P>K>N,磷是产量的首要限制因子,施磷效果优于氮肥;(2)不适当的肥料配合不利于校正甚至加剧小麦养分吸收的失衡状态,最佳肥料配比才能改善营养平衡并促进高产;(3)豫西旱区土壤速效钾含量丰富,施用高量磷肥,仍不能完全满足小麦对钾磷的吸收。
The effect of matching of different fertilizers on the yield and the N,P,Kcontents in wheat leaves were studied. Particularly, the status of nutrient balance inwheat was studied using DRIS method. The results indicated in the followings: (1)Thesequence of nutrient requirements by wheat in rainfed lands is P>K>N. Phosphorousfertilizer is a major constraint to wheat yield in the west part of Henan Province. The ef-fect of P application is superior to that of N fortilizer. (2)An Irretionel matching of different fertilizers is unfavourable to the correction of nutrient balance but worsening ofnutrient uptake by wheat in balance. The optimal fertilizer matching can improve nutri-ent balance uptake by wheat thereby to improve wheat yield. (3)Soils in the rainfedlands in the west part of Henan province is rich in fast K_2O but poor in available P. Theapplication of more P fertilizer still can not meet the P requirement by wheat uptakecompletely. For this reason,attention should be paid to P fertilizer in fertilizer studies.
出处
《干旱地区农业研究》
CSCD
北大核心
1993年第4期36-40,共5页
Agricultural Research in the Arid Areas
关键词
小麦
施肥
营养
the arid area in the west part of Henan
winter wheat
optimal fertilization
DRIS method
nutrient balance
