【作者】 李鹏； 李玉浸； 杨殿林； 王志勇； 庞凤梅；

【Author】 LI Peng1,LI YuJin1,YANG DianLin1,WANG ZhiYong2,PANG FengMei1 (1.Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191,China;2.College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010019,China)

【机构】 农业部环境保护科研监测所； 内蒙古农业大学生态环境学院；

【摘要】 通过大田试验研究了不同施氮处理对菠菜土壤硝态氮累积的影响。结果表明:土壤的硝态氮含量随施氮量的增加而增加,过量施氮会引起土壤NO3--N含量过剩;同一供氮水平下,随着有机肥在整个有机无机肥料配施中所占份量的增加,同层土壤NO3--N含量降低;整个0-100cm土壤剖面的NO3--N从上层到下层呈"∧"型变化。不同施氮处理对土壤上层NO3--N含量影响显著,对下层土壤影响不明显。为协调菠菜产量和土壤硝态氮含量,建议尽量减少施氮水平,并进行有机无机肥料配施。更多还原

【Abstract】 Under different nitrogen fertilizer level and with combined application of organic and inorganic fertilizer, a field experiment was carried out to study the varying characteristics of soil NO3--N during the growth period of spinach. The results show that: soil NO3--N content increases following the rates of nitrogen fertilizer; the surplus amount of nitrogen fertilizer can result in the surplus amount of soil NO3--N content; When the amount of nitrogen fertilizer is equal and as the ratio of organic fertilizer increases, soil NO3--N content decreases in the same layer of soil; In the 0-100cm soil layer, the soil NO3--N content changes in the shape of "∧". In the upper soil layer, the soil NO3--N content changes obviously while in the lower soil layer it changes not obviously. Take a comprehensive consideration between the yield and Soil NO3--N of spinach, we suggest reduce the nitrogen level and take measures of combined application of organic and inorganic fertilizer.更多还原