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施用磷肥对土壤NO3——N累积的影响
引用本文:袁新民,同延安,杨学云.施用磷肥对土壤NO3——N累积的影响[J].植物营养与肥料学报,2000,6(4):397-403.
作者姓名:袁新民  同延安  杨学云
作者单位:1.中国农业大学植物营养系 北京100094;
摘    要:在黄土高原南部的国家黄土肥力和肥料效益监测基地进行的长期定位试验结果表明 ,在小麦 玉米轮作中 ,当年施氮量为N 352kg/hm2 时 ,单施氮肥或氮钾配合的 0~4m土壤剖面的NO3--N累积量达 1000kg/hm2 以上 ,其中约 50%~60%的NO3--N分布在 2~ 4m以下的土层中 ,而氮磷配合的 0~ 4m土壤剖面的NO3--N累积量仅为 220kg/hm2,且 80 %的NO3--N分布在 0~2m的土层中 ,增施磷肥由于增加了氮的吸收和对水分的利用而有效地降低了土壤中NO3--N的累积。

关 键 词:磷肥    NO3--N累积
修稿时间:1999-12-13

Effect of phosphate application on soil nitrate nitrogen accumulation
YUAN Xin min,TONG Yan an,YANG Xue yun,LI Xiao lin,ZHANG Fu suo.Effect of phosphate application on soil nitrate nitrogen accumulation[J].Plant Nutrition and Fertilizer Science,2000,6(4):397-403.
Authors:YUAN Xin min  TONG Yan an  YANG Xue yun  LI Xiao lin  ZHANG Fu suo
Affiliation:1.Dept. of Plant Nutrition;CAU;Beijing100094;
Abstract:An eight-year long-term experiment in Loess Plateau Area demonstrated the importance of balanced fertilization. In a rotation of wheat-corn, when nitrogen application rate was as high as 352kg·hm-2 ·a-1, NO3--N accumulation in a 4 meter deep profile was more than 1000kg/hm2 if there was no application of phosphorus fertilizer(treatment of N and NK), and 50%~60% of it distributed below 2 meter soil layer. For treatment of applying phosphorus fertilizer(NP), the NO3--N accumulation was only about 220kg/hm2, and more than 80% of it distributed in a layer of 0~2m. Balanced fertilization can greatly decrease soil NO3--N accumulation by increasing soil water use efficiency and nitrogen uptake.
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