中季干燥通过土壤cbbL细菌增加土壤溶解的有机碳和大米产量
Jinsong He1, Wei Wang2, Ting Liu3
1National Engineering Laboratory of Applied Technology for Forestry & Ecology in Southern China, Central South University of Forestry and Technology, Changsha, 410004, Hunan, China; College of Forestry, College of Soil and Water Conservation, Central South University of Forestry & Technology, Changsha, 410004, Hunan, China.
Journal of environmental management
|November 7, 2024
概括
中季干燥灌增强了土壤的碳和微生物多样性,提高了水产量. 这种水资源管理策略改善了土壤有机碳,并支持有利于可持续农业的有益微生物.
科学领域:
- 土壤微生物学和生物化学
- 农业科学 农业科学
- 环境科学环境科学
背景情况:
- 了解灌对土壤健康的影响对于可持续农业至关重要.
- 自营微生物在土壤有机碳 (SOC) 循环中发挥着关键作用.
- 优化灌制度可以影响作物产量和土壤肥力.
研究的目的:
- 研究不同灌模式 (雨水,中季干燥,连续洪水) 对自营微生物的影响.
- 分析这些制度对土壤活性有机碳分数和大米产量的影响.
- 确定最佳的灌策略,以提高土壤健康和作物生产率.
主要方法:
- 三种灌模式的比较:雨水 (RF),中季干燥 (MD) 和连续洪水 (CF).
- 评估土壤有机碳 (SOC),微生物生物质碳 (MBC),溶解有机碳 (DOC) 和它们的比例.
- 分析cbbL细菌多样性和社区组成,以及大米产量.
主要成果:
- 中季干燥 (MD) 模式显示了土壤溶解有机碳 (DOC) 和DOC/SOC比率最高.
- 雨水 (RF) 饮食表现出最高的微生物生物质碳 (MBC) 和MBC/SOC比率.
- MD疗法产生了最高的cbbL细菌α多样性,并显著增加了大米产量 (53%高于RF).
结论:
- 中季干燥 (MD) 灌制度是改善土壤有机碳和微生物多样性的最佳方式.
- 农药制促进有益的土壤微生物,增加土壤DOC,从而提高了水产量.
- 水资源管理策略对土壤微生物群落和农业生产率产生重大影响,为可持续实践提供指导.
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