| 高产夏玉米群体光合速率与产量关系的研究 |
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| 引用本文： | 胡昌浩,董树亭.高产夏玉米群体光合速率与产量关系的研究[J].作物学报,1993,19(1):63-69. |
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| 作者姓名： | 胡昌浩 董树亭 |
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| 作者单位： | 山东农业大学,泰安,271018 |
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| 摘 要： | 高产夏玉米群体光合速率在整个生育期的变化呈单峰型曲线,开花期达最大值.紧凑型品种在适宜高密度下具有较高的群体光合速率,易获高产,平展型品种在适宜低密度下,大喇叭口期上部叶＞上部叶下部叶,平展型品种上部叶＞中部叶＞下部叶.高产群体光合最适叶面积指数紧凑型品种6-7,平展型品种4-5.玉米开花后的群体光合速率与生物产
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| 关 键 词： | 夏玉米 群体光合速率 产量 |
| 收稿时间： | 1990-12-12 |
| 修稿时间： | 1991-12-10 |
Studies on the Relationship between Canopy Apparent Photosynthesis Rate and Grain Yield in High Yielding Summer Corn(Zea may L.) |
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| Hu Chang-hao,Dong Shu-ting,Yue Shou-song,Wang qun-ying,Gao Rong-qi,Pan Zi-long shandong Agicultural University.Taian.Studies on the Relationship between Canopy Apparent Photosynthesis Rate and Grain Yield in High Yielding Summer Corn(Zea may L.)[J].Acta Agronomica Sinica,1993,19(1):63-69. |
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| Authors: | Hu Chang-hao Dong Shu-ting Yue Shou-song Wang qun-ying Gao Rong-qi Pan Zi-long shandong Agicultural UniversityTaian |
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| Affiliation: | Shandong Agricultural University,Taian,271018 |
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| Abstract: | The present study was carried out during 1989--1990 to investigate the relation-ship between the canopy apparent photosynthesis (CAP) rate and grainyield of twohigh-yielding summer corn cuitivars at five different sowing densities. The results areas follows: The CAP rate of summer corn showed a single peak curve throughout the entiregrowth period. Maximum CAP values occurred around anthesis stage. Suitable highdensity could lead to higher values of CAP rate and higher yield in the erectleaf typecultivar. Suitable low densities could lead to higher values of CAP rate after themale tetrad stage and higher yield in the horizontal-leaf type cultivar. CAP distribution incanopy depth was middle leaves>top leaves>basal leaves in the erect-leaf typecultivar and was top leaves>middle leaves>basal leaves in the horizontal-leaf typecultivar. Opttmum leaf area index (LAI) with maximum values of CAP rate was6--7 in the erect-leaf type cultivar and 4--5 in the horizontal-leaf type cultivar.Values of CAP rate was positively correlated witll dry matter and grain yield afterflowering stage. Data also showed that grain yield could be enhanced if a morefavorable environment for CAP rate could be provided after flowering stage. |
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| Keywords: | Summer corn Canopy apparent photosynthesis rate Grain yield |
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