杂交晚稻田间肥料效应研究  

Research on the fertilizer effect for late-cropping hybrid rice

作　　者：高永桂[1] 杨春龙[1] 李华[1] 邹金福 王松夫 朱卫华[1] 

机构地区：[1]湖南省桃源县农业局,湖南桃源415700

出　　处：《中国土壤与肥料》2008年第2期48-51,共4页Soil and Fertilizer Sciences in China

摘　　要：2006年选择桃源代表性土种进行了杂交晚稻氮磷钾3因素4水平14个处理田间试验（即3414试验）。结果表明,在杂交晚稻（金优207）上氮肥的增产效应居首位,平均增产43.3%,钾肥次之,平均增产27.2%,磷肥的增产效果不明显,平均增产2.8%。钾肥的增产效果与土壤速效钾和缓效钾含量有关。采用二次多项式逐步回归的方法对试验产量结果进行肥料效应回归模型模拟,得到3丘试验田的肥料效应回归模型全部为氮、钾二元二次回归模型,据此提出了杂交晚稻的最佳施肥量为N 148.0-188.0 kg/hm^2,K2O 74.3-103.0 kg/hm^2。Field experiment of fertilizer effect were conducted in Taoyuan county in 2006. The results indicated that production effect of nitrogen fertilizer for late- cropping hybrid rice Jinyou 207 occupy first （ increased by 43.3% ）, then potash （27.2%）, and phosphate effect are not obvious （only 2.8% ）. Effect of the potash fertilizer have something to do with the content of quick - acting K and slow- acting K in the soil. Quadratic polynomial models of fertilization effects of 3 experiment plots were simulated, adopting the method of second- degree polynomial stepwise regression. According to the models, optimum amount of applied fertilizer are as follows N 148.0- 188.0 kg/hm^2 and K2O 74.3 - 103.0 kg/hm^2.

关 键 词：肥料效应 最佳施肥量 杂交晚稻 测土配方施肥 

分 类 号：S511.33[农业科学—作物学] S511