不同施肥和耕作方式下强化栽培水稻的生长与氮素利用

研究了不同施肥和耕作方式下强化栽培水稻的生长及氮素利用。结果表明,免耕条件下以尿素 猪粪强化栽培水稻的产量最高,而常耕条件下以单施尿素常规栽培水稻的产量最高,但各处理的产量差异并不显著。无论是免耕还是常耕条件下,单施尿素常规栽培水稻比单施猪粪强化栽培水稻植株积累更多的氮素量,但其氮素稻谷生产效率、氮素收获指数下降。两种耕作方式比较,免耕条件下水稻的氮素运转效率、氮素农艺效率显著高于常耕,但常耕条件下的氮素回收效率比免耕的高127.95%,差异显著。

Plant Growth and Nitrogen Utilization of the System of Rice Intensification under Different Fertilization Patterns and Tillage Ways

Experiment was conducted to compare plant growth and nitrogen utilization of the system of rice intensification(SRI) under different fertilization patterns and tillage at the late season in 2005.The results were as follows.Rice harvested the highest grain yield with urea plus pig muck fertilization and intensification cultivation under no-tillage,while the highest grain yield with only urea fertilization and conventional cultivation under conventional tillage,but the difference of yield were not significant at both tillage patterns.Rice plants accumulated more nitrogen with only application of urea and conventional cultivation than that with only pig muck application and intensification cultivation,but its nitrogen grain production efficiency and nitrogen harvest index decreased.Compared between tillage patterns,nitrogen transportation efficiency and nitrogen agronomy efficiency under no-tillage were higher significantly than those under conventional tillage,but nitrogen recovery efficiency under conventional tillage was 127.95% more than that under no-tillage,the difference was significant.