| 遮光对玉米干物质积累及产量性能的影响 |
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| 引用本文： | 陈传永,王荣焕,赵久然,徐田军,刘秀芝,王元东,成广雷,王晓光.遮光对玉米干物质积累及产量性能的影响[J].玉米科学,2014,22(2):70-75. |
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| 作者姓名： | 陈传永 王荣焕 赵久然 徐田军 刘秀芝 王元东 成广雷 王晓光 |
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| 作者单位： | 北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097;北京市农林科学院玉米研究中心, 北京 100097 |
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| 基金项目： | 国家玉米产业技术体系（nycytx-02）；北京市农林科学院青年科研基金（QN201115）；北京市农林科学院科技创新基金（CXJJ201309） |
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| 摘 要： | 选用玉米品种郑单958与先玉335，在大田条件分别于7叶全展期（T1）、13叶全展期（T2）、吐丝期（T3）、吐丝后15 d（T4）进行50%遮光处理，研究不同时期遮光对玉米干物质积累与产量性能的影响。结果表明，不同时期遮光均导致玉米终极生长量（a）、干物质积累速率最大时的生长量（Wmax）、最大干物质积累速率（Gmax）、平均叶面积指数（MLAI）、平均净同化率（MNAR）和收获指数（HI）降低，致使干物质积累与产量不同程度降低，吐丝后15 d遮光对干物质与产量影响最大。在产量构成因素中，遮光处理对穗粒数与千粒重影响较大，穗粒数减少占主导，其次是千粒重的降低。
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| 关 键 词： | 玉米 遮光 干物质 产量性能 |
| 收稿时间： | 2013/5/10 0:00:00 |
Effects of Shading on Dry Matter Accumulation and Yield Capability of Maize |
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| CHEN Chuan-yong,WANG Rong-huan,ZHAO Jiu-ran,XU Tian-jun,LIU Xiu-zhi,WANG Yuan-dong,CHENG Guang-lei and WANG Xiao-guang.Effects of Shading on Dry Matter Accumulation and Yield Capability of Maize[J].Journal of Maize Sciences,2014,22(2):70-75. |
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| Authors: | CHEN Chuan-yong WANG Rong-huan ZHAO Jiu-ran XU Tian-jun LIU Xiu-zhi WANG Yuan-dong CHENG Guang-lei and WANG Xiao-guang |
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| Institution: | Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China |
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| Abstract: | Field experiments were conducted using maize cultivars(Zhengdan958, Xianyu335) with shading of 50% at different stages to explore the effect of low light stress on dry matter accumulation characteristics and yield capability of maize. Shading treatments were conducted during the 7th leaf fully open(treatment T1), and the 13th leaf fully open(treatment T2), and the silking(treatment T3), and the 15th day after silking(treatment T4)and natural light condition without shading was used as the control. Each shading treatment would lasted 7 days. The results showed that, the maximum growth biomass(a), weight reaching maximum dry matter accumulation rate(Wmax), the maximum dry matter accumulation rate(Gmax), mean leaf area index(MLAI), mean net assimilation rate(MNAR) and harvest index(HI) decreased under shading conditions, the yield and dry matter accumulation then reduced in different degree correspondingly. Generally, the treatment T4 had the most important influence on yield and dry matter accumulation than other treatments. The results suggested that grain number per ear than 1 000-kernel weight were greatly influence by shading than other yield components. |
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| Keywords: | Maize Shading Dry matter Yield capability |
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