| 摘要: |
| 为探讨不同播期对不同熟性品种夏玉米生长发育及群体特性的影响,以纪元一号(早熟品种)、郑单958(中熟品种)及农大108(晚熟品种)为试验材料,于2008—2009年在中国农业大学上庄试验站设置3个播期的处理试验。结果表明:夏玉米的生育期随播期推迟而缩短,平均每推迟1 d全生育期缩短0.2~0.6 d;从早熟到晚熟品种夏玉米生育期缩短表现出加剧的趋势。随播期推迟,早熟与中熟品种的穗位比增大,茎粗降低,但播期对晚熟品种的穗位比与茎粗影响不显著。播种期推迟,夏玉米最大叶面积指数、地上部干物质重量、群体光合势(LAD)及籽粒产量均呈降低趋势,其中晚熟品种的籽粒产量降幅大于早熟品种。晚播与中播相比:农大108籽粒产量降幅为40.7%~41.6%,而纪元一号降幅为22.2%~27.7%。播期及品种是影响华北平原夏玉米生长发育的重要因素,适度提前播种利于高产群体的形成,在相同管理措施条件下郑单958具有较强产量优势。 |
| 关键词: 夏玉米 播种期 品种熟性 生长发育 群体性状 |
| DOI：10.11841/j.issn.1007-4333.2012.05.005 |
| 投稿时间：2012-03-20 |
| 基金项目:国家公益性行业(气象)科研专项(GYHY200906022);国家自然科学基金项目(41101046);国家重点基础研究发展计划项目(2009CB118608) |
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| Effect of sowing date and variety on growth and population characteristics of summer maize in North China Plain |
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XUE Qing-yu1,2, WANG Jing1, CAO Xiu-ping3, MA Wei1, FENG Li-ping1
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| (1.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;2.Tianjin Climate Center, Tianjin 300074, China;3.Animal Husbandry and Veterinary Bureau of Jixian, Tianjin 301900, China) |
| Abstract: |
| In order to investigate the effects of sowing dates and varieties on the growth,development and yield of summer maize,the experiments with three sowing dates and three varieties of Jiyuan 1(early-maturing),Zhengdan 958(middle-maturing),Nongda 108(late-maturing),were conducted in Shangzhuang experiment station of China Agricultural University in Beijing from 2008 to 2009.The results showed that the growth period of summer maize was shortened when the sowing date was put off.The growth period could be shortened by 0.2-0.6 days when the sowing date was delayed for one day.Postponing the sowing date of summer maize resulted in increase of the ratio of ear height to plant height,but the stem diameter for both early-maturing and middle-maturing varieties.The change was not significant for late-maturing variety.The parameters of maximum leaf area index,the aboveground dry matter,leaf area duration and grain yield were all low under late sowing of summer maize.The decrease of grain yield of late-maturing variety was greater than the early-maturing.The grain yield of Nongda 108 decreased by 40.7%-41.6%,and Jiyuan 1 by 22.2%-27.7%.It is evident that the varieties and sowing dates are both very important factors to growth of summer maize in North China Plain.Early sowing is benefit to build high-yield group of maize.Zhengdan 958 shows high yield advantage than others under the same management measures. |
| Key words: summer maize (Zea mays L.) sowing date variety growth and development physiological indices of population |
