每个山丘的苗木数量和植物间距对源盆动态和水产量形成的互动影响
Xiaoyan Wu1, Dongjie Xie1, Anjie Xu1
1Key Laboratory of Crop Cultivation and Farming System, College of Agriculture, Guangxi University, Nanning, China.
Frontiers in plant science
|December 10, 2025
概括
优化大米 (Oryza sativa L.) 产量涉及平衡植物间距和每个山丘的苗木. 狭窄间距的单个苗木通过增强生物质积累和优化源-沉平衡来最大限度地提高产量.
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:
- 米种群结构对于高产量至关重要,受植物间距和每个山丘的苗木的影响.
- 这些因素对大米产量形成和资源分配的综合影响需要进一步研究.
研究的目的:
- 评估每个山丘和植物间距的苗木协调变化如何影响米源-水槽动态和产量.
- 保持不变的苗木密度,同时评估不同大米品种的这些综合效应.
主要方法:
- 实地实验为期两年,使用四种大米品种,种植密度不变 (60×104公-1).
- 每个山丘和植物间隔的多样化的苗木.
- 利用线性模型,混合效应模型,回归和结构方程建模进行分析.
主要成果:
- 每个山丘增加的苗木和植物间距减少了产量和地表生物质 (AGB),但增加了收获指数 (HI).
- 狭窄间距的单个苗 (1苗/12.93厘米) 的产量最高 (7.27t ha-1),AGB最高 (16.4t ha-1),HI最低 (0.46).
- 有机碳和生物质积累对产量变化做出了重大贡献;恐慌生物质和源下沉平衡是关键驱动因素.
结论:
- 狭窄间距的单个苗木优化了大米的源水平衡.
- 这种配置通过增强生物质积累来弥补较低的收获指数,从而提高了总产量.
- 这些发现为优化大米种植实践提供了关键的见解,以提高生产率.
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