不同株型玉米品种的冠层结构特征
首发时间:2020-04-30
摘要:为了探讨不同株型群体的冠层结构与产量的关系,本试验以京农科728(JNK)、MC812(MC)、先玉335(XY1)、先玉047(XY2)、登海605(DH)、郑单958(ZD)、金海5号(JH)为试验材料。从品种的叶片形态、叶面积分布、各器官干物质分布、群体透光率及产量等方面研究了不同株型透光率的变化、叶面积分布状况、植株干物质分布状况及产量的关系。为合理调控夏玉米冠层结构,提高群体产量提供理论依据。结果表明,叶夹角越小,群体透光率越大,有利于穗位部提高光能利用率,且穗上部叶面积越大有利于粒重的增加,穗粒数更是受穗位层及上部叶片的影响。因此,高产量群体的冠层结构应为穗位及上部叶面积较大且叶向值较小。
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Canopy structure characteristics of maize varieties of different plant types
Abstract:In order to explore the relationship between canopy structure and yield of different plant type populations, Jingnongke 728 (JNK), MC812 (MC), Xianyu 335 (XY1), Xianyu 047 (XY2), Denghai 605 (DH), Zhengdan958 (ZD) and Jinhai 5 (JH) were used as test materials in this experiment. The changes of light transmittance, leaf area distribution, dry matter distribution, population transmittance and yield of different plant types, leaf area distribution, plant dry matter distribution and yield were studied. It provides theoretical basis for rational regulation of canopy structure of summer maize and improvement of population yield. The results showed that the smaller the blade Angle, the greater the light transmittance of the population, the better the utilization rate of the panicle, the larger the upper leaf area of the panicle, the better the grain weight, and the number of grains in the panicle was affected by the panicle layer and the upper blade. Therefore, the canopy structure of the high-yield population should be large in spike position and upper leaf area and small in leaf direction.
Keywords: Summer maize Plant type Canopy structure Production
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