摘要
在同一生态条件不同地力的4个点进行了油菜施用氮、磷、钾肥试验，有4个点的氮、磷肥效应可用二元二次方程进行较好的拟合，有2个点的磷、钾施肥效应可用一元二次方程进行较好的拟合，有1个点的磷、钾施肥效应可用一元二次方程进行较好的拟舍，并利用微分法测算出4个点的最佳施肥量。结合土壤测试结果测算出的全氮、水解氮、有效磷和速效钾的校正系数分别在0．0150-0．0276、0．223-0．371、0．306～1．298和0．367-0．838，且均随土壤养分含量增加而降低。
The ＂3414＂ design was used in four testing sites with different soil fertility under the same ecological condition to study effects of different application amount of N, P and K on rape yield. The results showed that the effect of N and P accorded with the binary quadratic equation at four testing sites, the effect of P and K accorded with the quadratic equation at two testing sites and the effect of P and K accorded with the quadratic equation at one testing site. The optimum application amounts for four testing sites were respectively calculated. The rectification coefficient of total N, hydrolysable nitrogen, active P and active K was 0. 0150 to 0. 0276, 0. 223 to 0. 371, 0. 306 to 1. 298 and 0. 367 to 0. 838 respectively and reduced with increase of soil nutrients.
出处
《贵州农业科学》
CAS
北大核心
2009年第1期58-61,共4页
Guizhou Agricultural Sciences
基金
农业部
财政部测土配方施肥补贴资金项目
关键词
油菜
施肥效应
氮
磷
钾肥
最佳施肥量
rape
fertilizing effect
N, P, K fertilizer
optimum application amount
