优化种植密度,以改善源水关系和混合小麦在晚播种条件下的产量
Yulu Zhang1,2, Zixin Zhu1,3, Changxing Zhao1
1College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China.
Plants (Basel, Switzerland)
|January 28, 2026
概括
增加冬季小麦的种植密度,特别是混合品种的种植密度,可以在晚播种条件下提高产量. 最佳密度 (300种植物·m−2) 提高了源-沉协调,提高了谷物数量和重量,以获得更高,更稳定的产量.
科学领域:
- 农业学是一种农业学.
- 植物生理学 植物生理学
- 农作物科学 农作物科学
背景情况:
- 冬季小麦的晚播通常会降低产量潜力.
- 增加种植密度是一种减轻产量损失的策略.
- 密度影响对高潜能杂交小麦的源-沉动态的机制尚未完全理解.
研究的目的:
- 研究种植密度对源盆关系和混合和传统冬季小麦产量的影响.
- 为了确定晚播种条件的最佳种植密度.
- 通过密度调节来阐明产量增强背后的生理机制.
主要方法:
- 实地实验为期两年的杂交 (Jingmai 17) 和传统 (Jimai 22) 的小麦品种.
- 测试了三个种植密度:150 (M1),300 (M2) 和450种植物·m−2 (M3).
- 系统地调查源-水槽关系和产量组成部分.
主要成果:
- 两种品种的M2密度 (300种植物·m-2) 显著提高了两种品种的产量 (2.4-10.6%).
- 这种密度维持了光合作用,延迟了衰老,改善了同化转位,增加了谷物数量和重量.
- 混合动力Jingmai 17显示出8.2-10.1%的收益率优势,这是由于优越的源功能,水槽容量和协调效率.
结论:
- 种植密度为300 plants·m−2优化了混合动力Jingmai 17在晚播种下的源-下水沟关系.
- 这种密度最大限度地提高了产量潜力,实现了高和稳定的产量之间的平衡.
- 为该地区选择高产混合小麦品种提供种植见解.
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