论文部分内容阅读
为了改变甘肃省河西沙漠沿线地区小麦的低产面貌,在系统工程原理和方法的指导下,1985年我们采用四元二次回归通用旋转组合设计和相应分析技术,借助电子计算机,研究了亩施纯氮(x_1)、亩施五氧化二磷(x_2)、亩播种粒数(x_3)和头水叶龄(x_4)等四项主效因子与春小麦亩产量(a)、亩净产值(b)、亩穗数(c)、穗粒数(d)和千粒重(e)等目标函数间的变化规律。获得了分别以a、b、c、d、e为目标函数的数学模型:
In order to change the low yield of wheat along the Hexi Desert in Gansu Province, under the guidance of system engineering principles and methods, in 1985, we used quadratic quadratic regression general rotation combination design and corresponding analysis techniques. With the help of computer, Nitrogen (x_1), Phosphorus pentaoxide (x_2), seed sowing number (x_3) and leaf age (x_4) were related to spring wheat yield (a), net output per mu Acreage (c), grain number per spike (d) and grain weight per thousand (e). Obtained a, b, c, d, e as the objective function of the mathematical model: