土壤pH,有机物,可交换酸度和阴离子交换能力的相互作用在一个经营的茶叶农场
Haijie Song1, Jing Shi1, Rou Wang1
1College of Tea Science, Guizhou University, Guiyang, Guizhou Province, China.
PeerJ
|December 1, 2025
概括
扬农场的茶叶种植导致了严重的土壤酸化,主要是由于可交换的Al3+. 管理土壤有机物和阳离子交换能力对于可持续茶叶种植至关重要.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境科学 环境科学
背景情况:
- 扬海茶庄成立于1952年,茶叶种植历史悠久.
- 茶叶植物通过激活土壤 (Al3+) 来影响土壤的物理化学特性.
- 了解土壤的特性对于肥沃性,养分保留和农业可持续性至关重要.
研究的目的:
- 调查土壤pH值,可交换酸,土壤有机物 (SOM) 和阴离子交换能力 (CEC) 的分布.
- 在管理的茶园中评估这些属性的相互作用.
- 在不同的土地使用类型中比较土壤特性.
主要方法:
- 从经营茶园,未经营茶园和Pinus massoniana森林中收集了表面和土壤特征样本.
- 使用实验室pH计测量土壤pH值.
- 使用标准实验室方法 (加热二酸盐,化物出水,光谱测量) 确定SOM,可交换酸和CEC.
主要成果:
- 土壤平均pH值为4.50,表面土壤严重酸化主要是由于可交换的Al3+.
- 扬海茶庄的表面土壤由于丰富的SOM (55.94g kg-1) 和CEC (24.06 cmol(+) kg-1),具有很高的肥料保留能力.
- 与未经管理的茶园和Pinus massoniana森林相比,经过管理的茶园显示土壤酸化速度更快.
结论:
- 茶园中的表面土壤酸化是显著的,可交换Al3+作为主要的酸性成分.
- 建议包括补充茶叶采摘后的有机肥料,以补充SOM,SOM在高峰季节耗尽.
- 长期管理应侧重于防止茶园中的过度土壤酸化.
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