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进行农田土壤渗漏及伴随的N和P淋失的研究是十分重要的,这对于制定合理的水肥管理措施和保护人类的生存环境具有十分重要的意义.选取湖北省漳河灌区的水旱作物(水稻和玉米)作为研究对象,对两种作物在不同处理方式下土壤N和P渗漏淋失的规律及其主要影响因素进行了深入分析.试验结果表明:不同的土地利用方式的土壤有不同的特性,对N和P淋失影响显著;灌溉方式直接影响渗漏量,对N和P淋失有一定影响;在作物生育期的不同阶段,N和P淋失存在显著差异;不同的降雨条件和地形地势差异也会对N和P淋失产生一定影响.
It is very important to study the soil seepage and accompanying N and P leaching in farmland, which is of great significance to formulate reasonable management measures of water and fertilizer and to protect the living environment of human beings.Water and drought crops in Zhanghe Irrigation District of Hubei Province (Paddy and maize) as the research object, the law of leakage leaching of soil N and P and the main influencing factors of the two crops under different treatment modes were analyzed in depth.The results showed that the soil with different land use patterns Different characteristics have significant effects on the leaching of N and P. The irrigation methods directly affect the amount of leakage and have some impact on N and P leaching. There are significant differences in leaching of N and P at different stages of crop growth period. Rainfall and terrain differences also have an impact on N and P leaching.