扩行缩株对夏玉米群体冠层结构及产量的影响

丁相鹏,白晶,张春雨,张吉旺,刘鹏,任佰朝,赵斌

Effects of Line-Spacing Expansion and Row-Spacing Shrinkage on Population Structure and Yield of Summer Maize

DING XiangPeng,BAI Jing,ZHANG ChunYu,ZHANG JiWang,LIU Peng,REN BaiZhao,ZHAO Bin

表4 扩行缩株对夏玉米植株形态特征的影响

Table 4 Effects of line-spacing expansion and row-spacing shrinkage on plant morphological characteristics of summer maize

年份 Year 密度 Density 行距 Row space 株高 Plant height (cm) 穗位高 Ear height (cm) 穗位系数 Ear ratio (%) 茎秆横截面积 Stalk area (cm2) 茎叶夹角 Leaf angle (°) 叶向值 LOV 2018 D1 B1 247.00a 122.50a 49.60a 4.36a 24.33bc 61.79bc B2 248.75a 121.25a 48.74a 4.45a 25.64b 59.50c B3 251.25a 122.50a 48.76a 4.31a 27.64a 56.22d 平均值Average 249.00 122.08 49.03 4.37 25.87 59.17 D2 B1 252.67a 127.50a 50.46a 3.32c 21.23d 66.36a B2 252.25a 124.23a 49.25a 3.59b 23.91c 62.94b B3 254.17a 124.62a 49.03a 3.46bc 25.50b 60.32bc 平均值Average 253.03 125.78 49.71 3.46 23.55 63.21 2019 D1 B1 253.89a 118.50c 46.67a 4.79a 24.35bc 60.91b B2 256.75a 121.20bc 47.21a 4.64a 25.66b 56.93c B3 252.60a 116.80c 46.24a 4.75a 27.65a 55.25c 平均值Average 254.41 118.83 46.71 4.73 25.89 57.70 D2 B1 257.75a 128.13a 49.71a 3.66c 21.22d 64.96a B2 259.29a 125.83ab 48.53a 3.99b 23.93c 62.30ab B3 265.10a 127.90a 48.25a 4.05b 25.51b 60.35b 平均值Average 260.71 127.29 48.82 3.90 23.55 62.54 变异来源 Sources of variation 年份 Year (Y) * NS ** ** NS NS 密度 Density (D) NS ** NS ** ** ** 行距 Race space (R) NS NS NS * ** ** 年份×密度Y×D NS NS NS NS NS NS 年份×行距Y×R NS NS NS NS NS NS 密度×行距D×R NS NS NS ** NS NS 年份×密度×行距 Y×D×R NS NS NS NS NS NS