评估玉米在不同土壤湿度制度下从季节早期的营养压力中恢复
Solomon Amissah1, Godfred Ankomah1, Robert D Lee1
1Department of Crop and Soil Sciences, University of Georgia, Tifton, GA, United States.
Frontiers in plant science
|March 21, 2024
概括
季节早期的营养压力大大降低了玉米的产量和恢复. 在V6生长阶段充足的营养供应对于最佳的玉米 (Zea mays) 生产和营养使用效率至关重要.
科学领域:
- 农业学是一种农业学.
- 植物生理学 植物生理学
- 土壤科学 土壤科学
背景情况:
- 玉米 (Zea mays) 的生物质和营养吸收在V6生长阶段较低.
- 与作物需求同步营养供应可以最大限度地减少损失并提高效率.
- 了解季节早期的营养压力可以为管理策略提供信息.
研究的目的:
- 评估玉米在不同土壤水分和灌条件下从季节早期的营养压力中恢复.
- 为了确定营养压力对玉米生长,营养吸收和产量的影响.
- 为了确定玉米生产的关键营养管理时期.
主要方法:
- 实地研究比较营养压力和非压力玉米 (Zea mays).
- 在50%和80%的田地容量下使用空面和地下滴灌 (SSDI) 进行灌安排.
- 在V6生长阶段和收获时评估营养度,生物质和产量.
主要成果:
- 在V6时,营养物质度 (除铜外) 仍然足够,但在压力下,生物质减少了50%以上.
- 季初的营养压力显著降低了营养吸收和玉米产量 (1.583.4 Mg ha-1).
- 地下滴灌加剧了由于表土水压力的产量损失 (37.638.2%).
结论:
- 在早期生长阶段充足的营养供应对于玉米 (Zea mays) 生产至关重要.
- 玉米从季节早期的营养压力中恢复是有限的,这凸显了及时施肥的重要性.
- 需要进一步的研究来优化玉米的早期季节营养管理.
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