李宁, 翟志席, 李建民, 段留生, 李召虎. 播期与密度组合对夏玉米群体源库关系及冠层透光率的影响[J]. 中国生态农业学报(中英文), 2010, 18(5): 959-964. DOI: 10.3724/SP.J.1011.2010.00959
引用本文: 李宁, 翟志席, 李建民, 段留生, 李召虎. 播期与密度组合对夏玉米群体源库关系及冠层透光率的影响[J]. 中国生态农业学报(中英文), 2010, 18(5): 959-964. DOI: 10.3724/SP.J.1011.2010.00959
LI Ning, ZHAI Zhi-Xi, LI Jian-Min, DUAN Liu-Sheng, LI Zhao-Hu. Effect of sowing date and density on sink/source relationship and canopy light transmission of summer maize (Zea mays L.)[J]. Chinese Journal of Eco-Agriculture, 2010, 18(5): 959-964. DOI: 10.3724/SP.J.1011.2010.00959
Citation: LI Ning, ZHAI Zhi-Xi, LI Jian-Min, DUAN Liu-Sheng, LI Zhao-Hu. Effect of sowing date and density on sink/source relationship and canopy light transmission of summer maize (Zea mays L.)[J]. Chinese Journal of Eco-Agriculture, 2010, 18(5): 959-964. DOI: 10.3724/SP.J.1011.2010.00959

播期与密度组合对夏玉米群体源库关系及冠层透光率的影响

Effect of sowing date and density on sink/source relationship and canopy light transmission of summer maize (Zea mays L.)

  • 摘要: 通过播种期和密度两因素耦合试验(3个播期, 各播期下设3个密度)研究不同播期、密度组合对夏播玉米群体源库关系及冠层透光率的影响。结果表明: 适宜播期(6月22日之前)与适当密度(半紧凑型品种“金海5号”为6.00~7.50万株·hm-2, 紧凑型品种“郑单958”为6.75~8.25万株·hm-2)组合的各源库指标表现较优。叶面积指数(LAI)在吐丝期达到4.88~5.97, 成熟期仍保持在2.73~4.48; 群体透光率在吐丝期和成熟期分别达21.09%~34.82%和27.97%~35.29%; 吐丝期穗位叶片Pn较高, 达34.4~41.7 μmol(CO2)·m-2·s-1; “金海5号”6月15~17日播种、播种密度为7.50万株·hm-2, “郑单958”6月15~17日播种、播种密度为8.25万株·hm-2时, 均产量达到最大, 分别为14 863.50 kg·hm-2和15 123.30 kg·hm-2

     

    Abstract: An experiment involving 2 cultivars, and 3 sowing dates and densities was conducted in Laizhou Experimental Station of China Agricultural University in 2008~2009 with the objective of selecting the optimum cultivation pattern. The effects of sowing date and density on sink/source relationship and canopy light transmission of summer maize population were also analyzed in the experiment. The results indicate higher sink/source indices under sowing date before June 22 at a density of 6.00×104~ 7.50×104·hm-2 (semi-compact variety “Jinhai No. 5”) or 6.75×104~8.25×104·hm-2 (compact variety “Zhengdan 958”). At this rate, LAI is 4.88~5.97 at silking and 2.73~4.48 at maturity stage, light transmission is 21.09%~34.82% at silking and 27.97%~35.29% at maturity stage, ear-leaf Pn is 34.4~41.7 μmol(CO2)·m-2·s-1. The optimum yield is 14 863.50 kg·hm-2 for “Jinhai No. 5” sowed at June 15~17 with 7.50×104·hm-2 density, and 15 123.30 kg·hm-2 for “Zhengdan 958” sowed at June 15~17 with 8.25×104·hm-2 density.

     

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