化肥有机肥配合对水稻产量和氮素利用的影响.pdf

中国农学通报 2009,25(11):88-92 Chinese Agricultural Science Bulletin 化肥有机肥配合对水稻产量和氮素利用的影响 1 2 2 管建新 ，王伯仁 ，李冬初 1 2 （湖南省祁东县农业局，湖南祁东421600 ；中国农业科学院祁阳红壤实验站，湖南祁阳421001 ） 摘 要：通过对不同施肥下水稻产量和氮肥利用率连续4 年的定位观测研究，结果表明：在红壤丘陵区稻 田上，土壤氮素来源以施肥带入为主，占土壤氮素总收入95% 以上，氮素带出以作物吸收和氨挥发损失 为主要途径；水稻对氮素吸收利用与氮素形态关系密切，早稻对无机氮吸收利用好于有机氮，晚稻对有 机氮利用优于无机氮；对水稻4 年产量统计分析，单施有机肥（M ）处理与化肥（NPK ）处理具有同等的产 量效果，但有机肥料处理提高土壤有机质含量，提升了土壤生产力；单施有机肥（M ）处理氮肥利用率达 37.8% ，化肥有机肥配施（NPKM ）处理氮肥利用率为35.1% ，而单施化肥（NPK ）处理氮肥利用率仅为 25.7%。 关键词：化肥有机肥配合；水稻产量；氮素利用 中图分类号：S147.34 ；S153.6 文献标识码：A EffectofChemicalFertilizerAppliedCombingwithOrganicManure onYieldofRiceandNitrogenUsingEfficiency 1 2 2 Guan Jianxin , Wang Boren , Li Dongchu 1 ( AgriculturalBureauinQiDongCountyHunanProvince, Qidong Hunan 421600; 2QiyangRedSoilExperimentalStation,CAAS, Qiyang Hunan 421001) Abstract: Four years in site field experiment were conducted to study in the effect of chemical fertilizer applied combing with organic manure on yield of rice and nitrogen use efficiency. The results showed that the sources of nitrogen in soil were mainly come from application. And it was account for above 95% of total nitrogen input. Nitrogen uptake by rice and nitrogen losses via ammonia volatilization was the main pass of nitrogen output. The inorganic nitrogen was easily absorbed by early rice and organic nitrogen was easily absor