论文部分内容阅读
在对徐州石灰岩山地不同植被恢复类型土壤理化性质研究的基础上,综合分析了不同植被恢复类型对土壤健康影响,结果表明:石灰岩山地不同植被恢复模式土壤健康存在明显差异。其中:针阔混交林中土壤物理性质较好,说明混交林在一定程度上改善了土壤物理性质;土壤有机质和各养分含量上层明显高于下层,且各养分含量均以针阔混交林最高,进一步说明混交林在一定程度上改善了土壤化学性质。应用主成分分析方法对3种植被类型林分土壤健康状况综合评价指标主成分得分,针叶林为-8.309,针阔混交林为6.876,阔叶林为1.433。各类型林分土壤健康状况排序为:针阔混交林>阔叶林>针叶林,表明针阔混交林能够改善土壤健康状况。建议在徐州石灰岩山地上应以针阔混交林为主要恢复模式,从而提高该地区土壤的健康水平。
Based on the study of the soil physical and chemical properties of different vegetation restoration types in the limestone mountainous area of Xuzhou, the effects of different vegetation restoration types on the soil health were comprehensively analyzed. The results showed that there were significant differences in soil health between different vegetation restoration models in the limestone mountainous areas. Among them, the soil physical properties of mixed coniferous and broad-leaved forest are better, indicating that mixed forest to some extent to improve the physical properties of soil; soil organic matter and nutrient content of the upper layer was significantly higher than the lower layer, and the nutrient content of the coniferous and broad- Further explain the mixed forest to a certain extent, improve the soil chemical properties. Principal component analysis was used to evaluate the main components of soil health status of three vegetation types. The score of the main component was -8.309 for coniferous forest, 6.876 for coniferous and broad-leaved forest and 1.433 for broad-leaved forest. Soil health status of all types of stands ranked as follows: coniferous-broadleaved mixed forest> broadleaf forest> coniferous forest, indicating that coniferous and broad-leaved mixed forest can improve soil health status. It is suggested that the coniferous and broad-leaved mixed forest should be the main recovery mode in the limestone mountainous area of Xuzhou so as to improve the soil health of the area.