| 摘要: |
| 为阐明四川省夏玉米生理成熟后穗下茎秆倒折规律，选用四川省大面积推广的夏玉米品种，在田间生理成熟后至收获前调查穗下茎秆倒折的具体位置，分析玉米植株性状与倒折发生位置的关系。结果表明，生理成熟后玉米穗下茎秆倒折各节位占比随节位的上升呈现先增后降的趋势，主要发生在基部第3、4和5节，所占比例分别为33.86%、34.66%和16.33%。生理成熟后穗下茎秆倒折主要发生在各茎节下部2.0 cm至茎节上部3.5 cm区域。参试品种生理成熟后茎秆倒折高度及倒折节位与株高、穗位高相关性均不显著。 |
| 关键词: 四川省 夏玉米 生理成熟后 穗下茎秆倒折 倒折节位 |
| DOI：10.11841/j.issn.1007-4333.2021.01.02 |
| 投稿时间：2020-02-10 |
| 基金项目:国家重点研发计划项目(2018YFD0301206, 2017YFD0301704) |
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| Analysis of the position of the stalk lodging under ear after physiological maturity of Sichuan summer maize |
|
ZHAO Bo,WU Yawei,YUAN Jichao,KONG Fanlei
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| (College of Agronomy/Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang 611130, China) |
| Abstract: |
| To clarify the regularity of lodging of stalk under ear after physiological maturity of summer maize, the specific position of stalk lodging under ear after the physiological maturity of the field to the harvest was investigated, and the relationships between the characteristics of maize plants and the occurrence position of lodging were analyzed. The results showed that: The proportion of each node increased first and then decreased with the increase of the node after the physiological maturity of Sichuan summer maize. It mainly occurred in the third, fourth and fifth nodes of the stalk base, accounting for 33. 86%, 34. 66% and 16. 33%, respectively; After the physiological maturity of summer maize in Sichuan Province, the stalk lodging mainly occurred in the area from 2. 0 cm in the lower part of each stalk node to 3. 5 cm in the upper part of each stalk node. In conclusion, under the conditions of this experiment, there was no significant correlations between the height, the node position of stalk lodging and plant height, ear height after physiological maturity. |
| Key words: Sichuan Province summer maize after physiological maturity stalk lodging under ear lodging node position |
