【作者】 吴建富； 张美良； 刘经荣； 王海辉；

【Author】 Wu Jian-fu Zhang Mei-liang Liu Jing-rong Wang Hai-hui(College of Land Resource and Environment, Jiangxi Agricultural University, Nanchang 330045) (College of Agronomy, Jiangxi Agricultural University, Nanchang 330045)

【机构】 江西农业大学国土资源与环境学院； 江西农业大学农学院；

【摘要】 本文研究了有机—无机肥料配施对红壤稻田淹水层、不同深度渗漏水、外排水和土壤剖面中氮素的含量、形态及其动态的影响。结果表明:各处理淹水层、外排水和渗漏水中N素的含量,水稻生育前期单施化肥的高于配施有机肥的;相反,水稻生育后期,后者高于前者。N素的存在形态主要为NH4+-N和NO3--N,且NH4-+N含量明显高于NO3--N。各处理上层(30 cm)渗漏水中NO3--N的比例大多低于下层(50 cm)。外排水中N的输出量均以苗期为最高,且单施化肥的大于配施有机肥的。土壤剖面中NH4-+N向下迁移比碱解N更为明显,且配施有机肥的远高于单施肥的,而NO3--N正好相反。更多还原

【Abstract】 SummaryThe effects of combined application of organic and inorganic fertilizer on amounts, form and dynamic of nitrogen in soil flooding layer, percolating water of different depth of soil, out-drain water and soil profile in paddy fields of red earth were studied. Results showed that during the early growing stage of rice the amount of N in soil flooding layer, percolating water and out-drain water was higher for inorganic fertilizer treatment than that of the combined application of organic and inorganic treatment. On the contrary, it was higher for the latter during the later growing stage of rice. The existing form of N was mainly NH4+-N and NO3--N, and the content of NH4+-N was more than that of NO3--N. The proporation of NO3--N in percolating water at depth of 30 cm was lower than that of 50 cm. The output of N in out-drain water was the highest in seeding period and it was much higher for inorganic fertilizer applied alone. The downward migration of NH4+-N was obvious than that of alkali-hydrolyzable. N and it was more for the treatment of combined fertilizer. But the migration of NO3--N was on the contrary.更多还原