干燥-重新湿周期对和蔬菜土壤中的合成分的影响
Ziwan Wang1, Kamel Mohamed Eltohamy1, Boyi Liu1
1Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China.
The Science of the total environment
|October 24, 2023
概括
干燥-重新湿周期对土壤有很大影响,特别是合 (CP). 保持土壤湿度在50-70%之间可以减少农业土壤中CP积累.
科学领域:
- 土壤科学 土壤科学
- 环境化学环境化学
- 农业科学 农业科学
背景情况:
- 已知干燥复湿 (DRW) 周期会影响土壤 (P) 的行为.
- 农业土壤中DRW对不同大小的合 (CP) 的具体影响仍然不太清楚.
- 了解CP动态对于农业系统中的营养循环和水质至关重要.
研究的目的:
- 研究DRW周期对农业土壤中CP动员的影响.
- 分析DRW强度和周期如何影响CP分数 (细,中,粗).
- 确定土壤类型和 CP 组成在 DRW 引起的变化中的作用.
主要方法:
- 收集了米和蔬菜土壤样本.
- 土壤经历了3,6和9个不同强度的DRW周期.
- 通过过分成细 (FC-P; 1-220 nm),中 (MC-P; 220-450 nm) 和粗 (CC-P; 450-1000 nm) 尺寸的化合物P (CP).
- 测量了CP度并分析了其组成,与土壤有机碳,和铁相关联.
主要成果:
- 体P构成了水溶性P (<1000nm) 的重要部分 (71.1%在米中,55.6%在植物土壤中).
- 微型体P (FC-P) 是主导的部分 (50%在米土壤中,44%在植物土壤中).
- 液压压循环改变了CP的度和成分,但没有改变大小分量的整体分布.
- CP与土壤有机碳,和铁含量正相关.
结论:
- 电循环显著影响农业土壤中的合动态.
- 这些变化对营养的可用性和潜在的水质恶化有影响.
- 保持土壤湿度在水容量的50-70%,可以减轻因DRW事件引起的CP积累.
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