优化的种植密度和气可以通过改善树冠功能和源下水平衡来提高滴滴化玉米的谷物产量和水生产率
Zhenlin Lai1, Zhenqi Liao1, Hao Kong1
1Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest Agriculture and Forestry (A&F) University, Xianyang, Shaanxi, China.
Frontiers in plant science
|March 9, 2026
概括
在玉米 (Zea mays L.) 中优化 (N) 率和种植密度是产量和水生产率的关键. 中等密度与高N提高了谷物产量和用水效率,平衡了源水槽动态.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 农业学是一种农业学.
背景情况:
- 玉米的产量和水的生产力取决于源下水平衡和丝后的绿叶面积.
- 在玉米中, (N) 率,种植密度,叶子衰老和源水槽调节之间的机制尚不清楚.
研究的目的:
- 调查N率和种植密度如何影响玉米产量和水生产率.
- 阐明造后叶子功能衰退和源下沉平衡在这些过程中的作用.
主要方法:
- 在不同种植密度 (80,000120,000植物/ha) 和N速率 (0240公斤/ha) 的实地实验中.
- 评估叶面积持续时间 (LAD),叶子衰老,源下沉特征,谷物产量和水生产力.
- 使用部分最小平方结构方程建模 (PLS-SEM) 分析变量关系.
主要成果:
- 的应用减少了叶子过早衰老;更高的种植密度加快了它.
- 增加的和种植密度都提高了LAD,源生长,水槽容量和源水槽差异.
- 沉限制限制了高密度的产量;LAD显著影响了产量和水生产率.
结论:
- 建议采用D2N2处理 (中等密度,高N) 以获得最佳的源-水槽平衡,节水和稳定的玉米产量.
- 这些发现提高了对水资源有限的环境中有效的密集种植和高产玉米种植的理解.
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