摘要
针对目前国内利用二元二次肥料效应函数确定最佳经济施肥量的数学方法存在的问题.依据多元函数的极值理论,结合生产实际,构造了一个既严密又便于应用的利用二元二次肥料效应函数确定最佳经济施肥量的数学模型,同时给出了详细的计算方法和步骤。
The function of binary quadric fertilizer effect has been extensively used in China to determine the optimum economy fertilizing quantity. In order to solve the problems occurred in practice, based upon math-matical theory and production practice, a mathmatical model which is accurate and easy to use has been established. This paper explains the model and its usage in detail.
出处
《吉林农业大学学报》
CAS
CSCD
1990年第4期57-59,83,共4页
Journal of Jilin Agricultural University
关键词
经济施肥量
数学模型
施肥设计
upper limit
lower limit
optimum economy fertilizing quantity
