| 播期对春玉米生长发育、产量及水分利用的影响 |
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| 引用本文： | 刘明,陶洪斌,王璞,张雅杰.播期对春玉米生长发育、产量及水分利用的影响[J].玉米科学,2009,17(2):108-111. |
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| 作者姓名： | 刘明 陶洪斌 王璞 张雅杰 |
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| 作者单位： | 中国农业大学农学与生物技术学院,农业部作物栽培与耕作学重点实验室,北京,100094 |
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| 基金项目： | “863”课题(2006AA100202)、中德合作项目DGF-International Research Training Program、国家自然科学基金(3057 1089) |
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| 摘 要： | 以郑单958和鲁单984为材料，研究了两个播期条件下春玉米的生长发育、产量形成和水分利用情况。结果表明：播期对春玉米生长发育和产量影响显著，且品种间表现趋势一致。晚播春玉米生育期缩短，在各时期叶面积指数和干物质积累均显著高于早播春玉米。晚播春玉米产量(干重)提高，粒重在播期间、品种间差异均不显著。晚播春玉米穗粒数显著提高，品种间差异不显著。推迟播期后总耗水量增加，但增加幅度小于产量增加的幅度，水分利用效率略高于早播春玉米。在本试验条件下，晚播春玉米具有较优叶面积指数，有利于干物质积累并向子粒转移，增加穗粒数。因此，在春玉米播期的选择上不应单纯考虑生育期的延长，应重视早播春玉米前期营养生长受限对产量的影响。
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| 关 键 词： | 春玉米 播期 生长发育 产量 水分利用效率 |
| 收稿时间： | 2008/3/13 0:00:00 |
Effects of Sowing Date on Growth, Yield Formation and Water Utilization of Spring Maize |
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| LIU Ming,TAO Hong-bin,WANG Pu,ZHANG Ya-jie.Effects of Sowing Date on Growth, Yield Formation and Water Utilization of Spring Maize[J].Journal of Maize Sciences,2009,17(2):108-111. |
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| Authors: | LIU Ming TAO Hong-bin WANG Pu ZHANG Ya-jie |
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| Abstract: | A field experiment of two planting dates and two genotypes Zhengdan958 and Ludan984 was carried out to compare crop growth, yield formation and water utilization of different planting dates. The results showed that LAI, dry matter and grain yield of two genotypes planted on May 15 were higher than those on April 24. There was no significant difference between genotypes. Planting in May 15 increased the yield. Difference of 1 000-grain weight between two planting dates and genotypes were not significant. The difference of grain number was not significant between two genotypes, but was significant between two planting dates. The grain number of spring maize planting at the second planting date was increased than the first planting date. Water consumption and water utilization efficiency of the second planting date was higher than the first sowing date. In this experiment, the LAI of the second planting date was higher than the first one, which promoted dry matter accumulation and increased kernel numbers. Therefore, vegetation growth of early planting date of spring maize was limited leading to yield decline should be considered. |
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