不同株型玉米冠层光氮分布、衰老特征及光能利用对增密的响应
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柏延文,张宏军,朱亚利,郑学慧,杨梅,李从锋,张仁和
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Responses of Canopy Radiation and Nitrogen Distribution, Leaf Senescence and Radiation Use Efficiency on Increased Planting Density of Different Variety Types of Maize
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BAI YanWen,ZHANG HongJun,ZHU YaLi,ZHENG XueHui,YANG Mei,LI CongFeng,ZHANG RenHe
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表2 密度对不同株型玉米吐丝前后光能截获和光能利用率的影响
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Table 2 Effect of planting density on intercepted photosynthetically active radiation and radiation use efficiency of different plant- type maize
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年份
Year | 品种
Cultivar | 密度
Density (plants/hm2) | 吐丝前Pre-silking | 吐丝后Post-silking | | IPAR (MJ·m-2) | RUE (g·MJ-1) | IPAR (MJ·m-2) | RUE (g·MJ-1) | | 2017 | 陕单609
Shaandan609 | 45000 | 807.7d | 1.046d | 1033.5c | 1.331d | | 60000 | 933.4c | 1.083c | 1075.8b | 1.482c | | | 75000 | 1021.5b | 1.112b | 1084.2a | 1.526b | | | 90000 | 1091.7a | 1.203a | 1086.6a | 1.539a | | 陕单8806
Shaandan8806 | 45000 | 1007.2d | 0.894b | 997.0b | 1.169c | | 60000 | 1108.1c | 0.902a | 1035.1a | 1.392a | | | 75000 | 1159.1b | 0.886b | 1020.2a | 1.348b | | | 90000 | 1214.7a | 0.851c | 995.7b | 1.345b | | 2018 | 陕单609
Shaandan609 | 45000 | 837.2c | 0.824d | 1004.1d | 1.449c | | 60000 | 931.2c | 0.969c | 1061.2c | 1.497b | | | 75000 | 1028.9b | 1.022b | 1077.2b | 1.648a | | | 90000 | 1094.3a | 1.083a | 1088.9a | 1.611a | | 陕单8806
Shaandan8806 | 45000 | 1063.4d | 0.887b | 991.8c | 1.376b | | 60000 | 1129.1c | 0.931a | 1038.8a | 1.475a | | | 75000 | 1188.1b | 0.862b | 1026.6b | 1.366b | | | 90000 | 1274.6a | 0.763c | 958.0d | 1.337c |
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