| 冠菌素对玉米抗倒伏能力及产量的影响 |
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投稿时间：2018-03-11
修订日期：2018-12-27
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| 引用本文：陶群,黄官民,郭庆,等.冠菌素对玉米抗倒伏能力及产量的影响[J].农药学学报,2019,21(1):43-51. |
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| 基金项目:国家杰出青年科学基金（3142500208） |
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| 中文摘要:在田间条件下，以玉米品种先玉335和郑单958为材料，在八展叶时于叶面喷施不同浓度（0、0.01、0.1、1和10 μmol/L）冠菌素（COR），研究了COR对玉米抗倒伏能力及产量的影响。结果表明：经10 μmol/L COR处理后，先玉335的株高和穗位高分别比对照降低了7.0%和19.9%，郑单958分别降低了20.8%和18.2%，单株叶面积、节间抗折断力、穗下第8~14节间长度和节间最大直径与对照间亦差异显著。且随着COR浓度的增加，先玉335和郑单958的株高、穗位高、单株叶面积和穗下第8~14 节间长度均逐渐降低；第8~14节间最大直径和节间抗折断力逐渐增大。经1 μmol/L COR处理后，2个供试玉米品种的产量、穗数、穗粒数和千粒重较对照均有所增加，其中先玉335的产量较对照增加了9.9%，郑单958增加了4.3%。综上所述，COR可以提高玉米的抗倒伏能力，不同品种玉米对COR的敏感性不同，其中先玉335抗倒伏的最适COR浓度为10 μmol/L，郑单958抗倒伏的最适COR浓度为1 μmol/L。 |
| 中文关键词:冠菌素 玉米 抗倒伏能力 产量 化学调控 植物生长调节剂 |
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| Effects of coronatine on lodging resistance and yield of maize |
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| Abstract:A field experiment using maize varieties Xianyu335 and Zhengdan958 was conducted to study the effects of spraying coronatine (COR) with different concentrations (0, 0.01, 0.1, 1 and 10 μmol/L) at V8 stage on maize yield and lodging resistance. The results showed that the plant height and ear height of Xianyu 335 treated with 10 μmol/L COR were decreased by 7.0% and 19.9%, respectively. And those of Zhengdan 958 were decreased by 20.8% and 18.2%, respectively. And the leaves area per plant, the breaking resistance, the length of the 8th-14th internodes and the maximum diameter of the 8th-14th internodes were significant different from the control. While the plant height, the ear height, the leaves area per plant, and the length of the 8th-14th internodes were decreased. And the maximum diameter and breaking resistance of the 8th-14th internodes were increased with the increase of the concentration of COR. Grain yield, ears per hm2, grain numbers per ear, and thousand grain weight of those two maize varieties treated with 1 μmol/L COR were increased compared with the control. The grain yield of Xianyu 335 increased by 9.9% compared with the control, and Zhengdan 958 increased by 4.3% compared with the control. In summary, COR could increase the lodging resistance of maize. The optimal COR concentration for Xianyu335 to increase lodging resistance was 10 μmol/L and that for Zhengdan958 was 1 μmol/L, indicating that different maize varieties have different sensitivity levels to COR. |
| Key words:coronatine maize lodging resistance grain yield chemical regulation plant growth regulator |
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