种植密度对贵州春玉米茎秆抗倒伏性能及籽粒产量的影响

郑迎霞, 陈杜, 魏鹏程, 卢平, 杨锦越, 罗上轲, 叶开梅, 宋碧

Effects of planting density on lodging resistance and grain yield of spring maize stalks in Guizhou province

ZHENG Ying-Xia, CHEN Du, WEI Peng-Cheng, LU Ping, YANG Jin-Yue, LUO Shang-Ke, YE Kai-Mei, SONG Bi

表7 种植密度与春玉米产量及其构成因素回归关系

Table 7 Regression relationship between planting density and spring maize yield and its components

项目 Item	品种 Varieties	回归方程 Regression equation	R²
产量 Grain yield	先玉1171 Xianyu 1171	y= -112.4x² + 2096.3x + 2555.5	0.8331^**
产量 Grain yield	新中玉801 Xinzhongyu 801	y = -89.6x² + 1547.3x + 4385.2	0.8589^**
有效穗数 Ear number	先玉1171 Xianyu 1171	y = 7069.1x + 16,271	0.9955^**
有效穗数 Ear number	新中玉801 Xinzhongyu 801	y = 5448.1x + 24,252	0.9909^**
穗粒数 Kernels per ear	先玉1171 Xianyu 1171	y = -14.2x + 792.6	0.9046^**
穗粒数 Kernels per ear	新中玉801 Xinzhongyu 801	y = -25.4x + 757.1	0.8519^**
百粒重 100-kernel weight	先玉1171 Xianyu 1171	y = -0.7x + 36.8	0.9227^**
百粒重 100-kernel weight	新中玉801 Xinzhongyu 801	y = -0.8x + 41.5	0.9227^**