高海拔地区黄壤茶园酸化及其原因分析——以挂墩茶园为例

Acidification and Reason of High Attitude Area's tea Garden in Yellow Soil Region——A case Study of Guadun Tea Garden

以武夷山挂墩茶园为研究区,通过土壤采样分析,选取土壤pH值、交换性酸2项指标对挂墩茶园土壤酸化问题进行研究。结果表明:挂墩茶园土壤pH值表现为A层<B层<BC层;交换性酸含量表现为A层>B层>BC层。通过不同植被利用方式下土壤pH值比较,茶园土壤酸化程度明显高于杉木林土壤,这表明茶树是造成挂墩茶园土壤酸化的主要原因,茶树根系代谢作用及枯枝落叶的还园作用导致茶园土壤酸化。

Selected Guadun tea garden as the research area, through sampling and analysis the soil. Taking the tea garden soil pH and exchangeable acid in Guadun as test objectives, and research the problem of tea garden soil acidification. The results showed that the value of pH is highest in BC and lowest in A, while exchangeable acid is highest in A and lowest in BC. Comparing the pH in different land - use, the tea garden soil acidification degree is higher than fir forest. Tea tree root metabolism and litter return is main reason to lead to soil acidification.