摘要
求导了水稻目标产量的预测方程，不同氮钾施用水平的等产方程，以及氮钾最佳配比方程。根据上述方程推导出地力产量为6345kg／hm2的水稻田目标产量为8589kg／hm2，N与K2O施用量的最佳配比为11．22，即N139．4kg／hm2、K2O170．6kg／hm2。
In this paper, we work out a forecast equation for aim-yield of rice, an equal-product-curve equation under different application rates of N and K2O, and the optimum proportion equation for N and K2O. Accordingto these equations, we calculate the optimum application proportion of N to K2O for the field, which capability yield is 6 345 kg/hm2, under the aim yield 8 589 kg/hm2. The proportion is 1: 1.22, namely, N 139.4 kg/hm2 and K2O 170.6 kg/hm2. It quite accords with practice.
出处
《土壤与环境》
CSCD
1999年第3期221-223,共3页
Soil and Environmental Sciences
基金
广东省"八五"科技攻关项目!1991-120-07
关键词
水稻
氮
钾
施肥量
最佳配比
rice
nitrogen
potassium
application rates
optimum proportion
