淮北夏玉米高产栽培综合农艺措施数学模型初探

<正> 玉米是粮饲兼用的高产作物,是平原农区农牧结合的重要环节。近年来随着作物种植结构的调整,淮北玉米种植面积由1980年的161.5万亩发展到1986年的309.3万亩,并由过去的以春玉米为主改为以夏玉米为主。但该区玉米生产多沿用传统经验,尚未建立起一套科学的栽培技术体系,因而生产水平较低。为此,我们从系统理论出发,于1987年在濉溪县杨柳乡进行了淮北夏玉米高产栽培综合农艺措施的田间试验研究,建立了主要农艺措施的多维反应面数学模型,并对利用数学模型解析技术信息和进行生产决策作了初步探讨,为淮北地区夏玉米栽培提供了较为全面的科学依据。

PRIMARY APPROACH ON THE MATHEMATICAL MODEL ABOUT COMPREHENSIVE AGRONOMIC MEASURES OF SUMMER MAIZE CULTIVATION FOR HIGH YIELD IN HUAIBEI AREA

According to the principle of systems science, the method of quadric regression rotational combination design had been appleid in the field experiment to approach problems of summer maize cultivation in Huaibei area。Factors as agronomic measure in the experiment were: planting date, placating density, amount of N and P_2O_5 applied。A function model of maize yield had been established based on the results of experiment and computer had been used for calculation and simulation. Some useful technical imformation had been revealed by the model analysis as follows: (1) the importance of the four factors to maize yield, (2) the single factor effect, (3) the double factors effect, (4) the marginal yield of each factor in different coding levels, Through the frequency analysis, optima regions of integrated agronomic measures for expected objective of maize yield which over 300 and 350 kg/mu were provided。