水稻精量节肥防治面源污染高产栽培模式研究

Research on rice higb-yielding culture mode with applng fertilizer in extractive quantity to control nonpoint-sonr cepollution

摘要: 采用二次回归组合设计试验研究水稻栽培精量节肥技术，建立了水稻栽培密度、施N量和施P量数字模型，该模型寻优结果表明水稻种植密度为20.9628万丛／hm² 、施N 素折尿素379.05 kg／hm²、施P素折过磷酸钙476.85 kg／hm² 时，其稻谷理论最高产量可达9211.5kg／hm²。

Abstract: Using the orthogonal quadratic regression design method，a cultivation technology mod e to retain rice high yield with applying fertilizer in extractive quantity is studied，and a numeric mod e of the density of rice planting，quantity of ap-plyirlg N and quantity of applying P is established，the results show that the theorical maximal yield of rice is 9211.5kg／hm² when the planting density of rice is 209628 clumps／hm²，the application amounts of N and P are 379.05kg／hm²and 476.85kg／hm²，respectively．