Effect of interaction between water and fertilizer on wheat and maize semiarid region of western Liaoning

Abstract

Abstract: Using 312-D optimum design and quadratic general rotation design,the effect of interaction between water and fertilizer on wheat and maize yields was studied in semiarid region of western Liaoning Province.Reasonable combination of applying N and P fertilizers,irrigation,and mulching corn straws could increase crop yield remarkably,otherwise,it could not only increase cost,but also result in output reduction due to increasing crop stress to water or nutrients.Based on the results of the trials,the effects of the productive factors on crop yield were analyzed.The optimum economical combination of water and fertilizers fitting for local agriculture was put forward,i.e., water 120.2mm,N 58.5kg·hm^-2, and P₂O₅ 123.0kg·hm^-2 for wheat,and water 173.3mm,N 256.5kg·hm^-2,P₂O₅ 85.5kg·hm^-2,and straw mulching 8509.5kg·hm^-2 for maize.

Key words: Semiarid region, Interaction between water and fertilizer, Regressive model, fenpropathrin, Panonychus citri, avermectin, life-table parameters., sublethal effect

LIU Zuoxin, ZHENG Zhaopei, WANG Jian. Effect of interaction between water and fertilizer on wheat and maize semiarid region of western Liaoning[J]. Chinese Journal of Applied Ecology, 2000, 11(4): 540-544.

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