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6 扩行缩株对夏玉米干物质积累与转运的影响

Table 6 Effects of line-spacing expansion and row-spacing shrinkage on dry matter accumulation and transport of summer maize

年份 Year 密度 Density 行距 Row space 吐丝期干物质 积累量 DMAS (t·hm-2) 成熟期干物质积累量DMAM (t·hm-2) 花后干物质积累量DMAAS (t·hm-2) 花后干物质转运量TADM (t·hm-2) 花后干物质转运对 籽粒的贡献率 CGDMT (%) 2018 D1 B1 10.91b 18.67cd 7.75b 1.75b 18.42c B2 10.94b 18.62d 7.68b 1.72b 18.25c B3 10.92b 18.58d 7.66b 1.76b 18.64c 平均值Average 10.92 18.62 7.70 1.74 18.44 D2 B1 11.39a 19.27bc 7.88b 2.72a 31.32a B2 11.72a 19.99a 8.28a 2.65a 29.64b B3 11.60a 19.40ab 7.81b 2.69a 31.31a 平均值Average 11.57 19.56 7.99 2.68 30.76 2019 D1 B1 10.46c 18.07c 7.61c 1.98d 20.64c B2 10.58c 18.25c 7.67c 2.03d 20.91c B3 10.50c 18.12c 7.62c 1.98d 20.61c 平均值Average 10.51 18.15 7.63 2.00 20.72 D2 B1 11.47ab 19.60b 8.13b 2.69a 30.40a B2 11.73a 20.25a 8.53a 2.59b 28.50b B3 11.22b 19.38b 8.15b 2.42c 28.00b 平均值Average 11.47 19.74 8.27 2.57 28.97 变异来源 Sources of variation 年份 Year (Y) ** NS NS ** NS 密度 Density (D) ** ** ** ** ** 行距 Race space (R) NS * ** ** ** 年份×密度Y×D * * ** ** ** 年份×行距Y×R NS NS NS ** ** 密度×行距D×R NS NS ** ** ** 年份×密度×行距 Y×D×R NS NS NS * *