摘要
根据田间试验结果，建立了四川丘陵区黄红紫泥土壤油菜肥料效应函数模型．结果表明磷的效应最大，其次是氮和钾．当施肥水平小于０．２５时，Ｋ＞Ｎ，超过０．２５时，Ｎ＞Ｋ．ＮＰ和ＮＫ对油菜产量具有显著正交互效应，而ＰＫ为显著负交互效应．交互效应大小随施肥水平的增加而提高。通过计算机模拟获得了油菜最高产量和最经济的肥料配方．分析了肥料对油菜产量结构的影响，提出了最适产量结构指标。
In this research, a functional model was established for the effects of fertilizers on rape in yellow-red purple soils in hilly areas of Sichuan. The results showed that phosphorus had a highest effect on rape yield followed by nitrogen and potassium. When the fertilizing level was over 0. 25 (about 131 kg N/ha or 82. 5 kg K2O/ha), the effiency of N was higher than K While that of K was higher than N when it was less than 0. 25. The interactions of N×P and P×K were positive and significant to the yield while that of P×K was negative. By computer simulating, the most favourable fertilizer combination for rape was worked out, and effects on the yield components were analysed.
出处
《中国油料》
CSCD
北大核心
1994年第2期38-42,共5页
基金
四川省科委"农业专家系统开发与推广应用"课题
关键词
黄红紫泥
油菜
产量结构
肥料效应
Yellow-red purple soil
Rape
Yield Components
Fertilizer response
