宁夏旱地农业土壤氮磷养分与油葵产量变化分析  

Research on nitrogen phosphorus nutrient and production change analysis by dryland agriculture in Ningxia

作　　者：王晓军[1] 何文寿[1] 马廷吉 王勤芳 王海军 王勤 王现知 杨贤斌 王庭伟 

机构地区：[1]宁夏大学农学院,宁夏银川750021 [2]宁夏固原林业局赵千户林场,宁夏固原756299 [3]宁夏西吉县兴泰建筑公司,宁夏西吉756209 [4]宁夏鑫尔特化学有限公司,宁夏银川750021 [5]宁夏西吉县林业局月亮山林杨,宁夏西吉756209 [6]宁夏吴忠监狱医院,宁夏吴忠751100 [7]西夏区农牧水务局,宁夏银川750021 [8]宁夏恒安建设监理公司,宁夏银川750021

出　　处：《农业科学研究》2012年第1期57-60,79,共5页Journal of Agricultural Sciences

基　　金：国家科技支撑计划课题(2011BAD29B07);国家自然基金项目(31160416)

摘　　要：通过田间试验的方法得出半干旱地区在供试土壤条件下土壤有效养分在0～20cm时氮、磷肥都呈现出高低的不稳定性,在20～40cm时氮、磷肥的肥效及肥料利用率也比较低,说明在宁夏旱作农业区由于耕作层的深度不一致,土壤养分的空间差异性比较大.结果表明,在中壤黏土区,目标产量在200～300kg/666.7m2时建议施入氮肥35～45kg/666.7m2,施入磷肥40～50kg/666.7m2,同时在施肥过程中应增施有机肥,有机肥和化肥相结合,适当增加氮肥和磷肥,减少或者少施钾肥的原则.This article through the method of field experiments that half dry area of the tested soil conditions in the soil nutrient effectively N P are presenting the instability of high and low in 0-20 cm, and the Nitrogen,Phosphate fertilizer utilization ratio and fertilizer applied are low in 20-40 cm. The sais dry land farming that the depth of the non-plough layer to differ in Ningxia, The soil nutrient space difference is bigger, Recommended in clay soil, goal 200-300 kg/666.7 m2 was recommended to production in the nitrogen 35-45 kg/666.7 m2 and Phosphate 40-50 kg/666.7 m2 , at the time should be followed the principle in the process： Add apply organic fertilizer, combined the organic and fertilizer, increasing nitrogen and Phosphate, reduce or less the potassium fertilizer.

关 键 词：旱地农业 氮磷养分 半干旱 宁夏 

分 类 号：S158.3[农业科学—土壤学]