不同颜色地膜和种植密度对春玉米田间地温、耗水及产量的影响

孙仕军,朱振闯,陈志君,杨丹,张旭东

Effects of Different Colored Plastic Film Mulching and Planting Density on Soil Temperature, Evapotranspiration and Yield of Spring Maize

ShiJun SUN,ZhenChuang ZHU,ZhiJun CHEN,Dan YANG,XuDong ZHANG

表3 不同生育时期耕层积温对产量的通径分析

Table 3 Path analysis of yield and accumulated temperature of maize in different growth stages

因子 Factor 相关系数 Correlation coefficient 直接通径系数 Direct path coefficient 间接通径系数 Indirect path coefficient R2贡献率Contribution rate R2 X1 X2 X3 X4 X5 X1 0.23 0.9133 -0.4942 -0.093 -0.0296 -0.0686 0.2101 X2 -0.38* -0.8244 0.5474 -0.0162 0.0228 -0.1107 0.3133 X3 0.31 -0.1982 0.4284 -0.0676 -0.0158 0.1597 -0.0614 X4 -0.22 -0.1632 0.1658 0.1154 -0.0191 -0.3209 0.0359 X5 -0.54** -0.4220 0.1486 -0.2163 0.075 -0.1241 0.2279