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不同水分、施氮量对土壤中硝态氮含量分布的影响

Effect of Irrigation and Nitrogen Fertilizer on NO₃^--N Content and Distribution in Soil

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【Author】 LIU Wei~1,ZHAO Tong-ke~(2,3),WANG Li-ying~3 (1.College of Resource and Environment,Agriculture University of Hebei,Baoding 071001,China;2.Institute of Plant Nutrition and Resource,Beijng Academy of Agricultural and Forestry Sciences,Beijing100089,China;3.Institute of Agriculture Resource and Environment,Hebei Academy of Agriculture and Forestry Sciences,Shijiazhuang050051 China)

【机构】河北农业大学资源环境学院；北京市农林科学院植物营养与资源研究所；河北省农林科学院农业资源环境研究所河北保定071001；北京100089；河北省农林科学院农业资源环境研究所；河北石家庄050051；

【摘要】通过田间试验,研究了不同氮肥用量和灌水量情况下土壤中硝态氮的动态分布。结果表明,土壤剖面的硝态氮含量随着施氮量的增加而增加,在同一施氮量水平下,随着土壤深度的增加,土壤中硝态氮含量递减。在冬小麦的整个生育期中,拔节期的追肥灌水有助于硝态氮向土壤深处移动,甚至有可能淋洗出根层,对地下水产生影响。更多还原

【Abstract】 Based on the field experiments of nitrogen fertilizer and irrigation applied to winter wheat,the effects of quantity on its dynamic distribution of soil NO₃^--N were studied.The results indicated that the content of soil NO₃^-N increased with increasing amount of N fertilizer application,and under the same level of nitrogen fertilizer,from top soil to deep layer of soil,the content of soil NO^-₃-N was decreased.According to the amount of NO^-₃-N in the deep layer soil during the growth of winter wheat,irrigation and fertilization help to NO^-₃-N leaching,so it was very easy to seep into ground-water and pollute the environment.更多还原