扩行缩株对夏玉米群体冠层结构及产量的影响
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丁相鹏,白晶,张春雨,张吉旺,刘鹏,任佰朝,赵斌
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Effects of Line-Spacing Expansion and Row-Spacing Shrinkage on Population Structure and Yield of Summer Maize
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DING XiangPeng,BAI Jing,ZHANG ChunYu,ZHANG JiWang,LIU Peng,REN BaiZhao,ZHAO Bin
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表5 扩行缩株对夏玉米透光率及消光系数的影响
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Table 5 Effects of line-spacing expansion and row-spacing shrinkage on light transmittance and extinction coefficient of summer maize
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年份 Year | 密度 Density | 行距 Row space | 透光率 (%) | 消光系数 Extinction coefficient equation | 吐丝期 Silking | 乳熟期 Milking | 穗位层Ear layer | 底层Bottom | 穗位层Ear layer | 底层Bottom | 吐丝期Silking | 乳熟期Milking | 2018 | D1 | B1 | 25.19d | 9.61c | 25.94d | 11.38c | 0.44c | 0.43b | | | B2 | 26.34c | 14.94b | 27.22c | 17.19b | 0.35e | 0.35d | | | B3 | 36.69 a | 20.83a | 37.09a | 22.46a | 0.30f | 0.31e | | | 平均值Average | 29.41 | 15.13 | 30.08 | 17.34 | 0.36 | 0.36 | | D2 | B1 | 15.45f | 3.19f | 16.46f | 5.92f | 0.54a | 0.50a | | | B2 | 19.31e | 4.92e | 20.22e | 6.82e | 0.46b | 0.45b | | | B3 | 29.32b | 8.64d | 31.23b | 10.76d | 0.40d | 0.39c | | | 平均值Average | 21.36 | 5.58 | 22.64 | 7.83 | 0.47 | 0.45 | 2019 | D1 | B1 | 23.19d | 8.35c | 24.39d | 12.84c | 0.46c | 0.43c | | | B2 | 25.22c | 16.03b | 25.93c | 18.03b | 0.34e | 0.36d | | | B3 | 33.93a | 18.01a | 35.05a | 21.37a | 0.32f | 0.33e | | | 平均值Average | 27.45 | 14.13 | 28.46 | 17.41 | 0.37 | 0.37 | | D2 | B1 | 14.45f | 3.01f | 17.23f | 5.46f | 0.58a | 0.55a | | | B2 | 19.49e | 4.56e | 20.62e | 6.22e | 0.49b | 0.49b | | | B3 | 27.75b | 7.83d | 29.92b | 9.05d | 0.42d | 0.44c | | | 平均值Average | 20.56 | 5.13 | 22.59 | 6.91 | 0.50 | 0.49 | | 变异来源 Sources of variation | 年份 Year (Y) | ** | * | ** | NS | ** | ** | | 密度 Density (D) | ** | ** | ** | ** | ** | ** | | 行距 Race space (R) | ** | ** | ** | ** | ** | ** | | 年份×密度Y×D | ** | ** | ** | ** | ** | ** | | 年份×行距Y×R | ** | ** | ** | ** | ** | ** | | 密度×行距D×R | ** | ** | ** | ** | ** | ** | | 年份×密度×行距 Y×D×R | NS | ** | NS | NS | NS | NS |
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