五指山次生林群落土壤养分特征及肥力质量评价

Soil Nutrient Characteristics and Fertility Quality Evaluation of Secondary Forest Communities in Wuzhishan

以五指山次生林群落为研究对象,探究次生林群落土壤养分特征在不同演替阶段(幼龄林、中龄林、成熟林、过熟林)的变化规律及其土壤肥力质量。结果表明:随着次生林正向演替的进程,土壤pH呈现先上升后下降的趋势,而土壤有机质、全磷含量均呈现先下降后上升的趋势,土壤全钾含量呈逐渐上升趋势;土壤有机质含量与pH为极显著负相关,土壤有机质含量与全氮、全磷均为极显著正相关;次生林群落不同演替阶段土壤养分综合得分排序:幼龄林>成熟林>过熟林>中龄林。

The soil samples in the secondary forest communities of Wuzhishan Mountains at different forest succession stages(young,middle-aged,mature and over-mature)were collected by using quadrat approach to analyze their changes in soil nutrient characteristics and their soil fertility quality.The results showed that with the process of positive succession of the secondary forests the soil pH increased first and then decreased,while the contents of soil organic matter and total phosphorus decreased first and then increased,and that the content of soil total potassium increased gradually.The content of soil organic matter is significantly negatively correlated with pH,and the content of soil organic matter is positively correlated with the contents of total nitrogen and total phosphorus.The comprehensive scores of soil nutrients in the secondary forest communities at different forest succession stages are in the order of young forest>mature forest>over-mature forest>middle-aged forest.