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以植被不同恢复阶段的普洱季风常绿阔叶林林地土壤为研究对象,分析了土壤理化性质随植被恢复的动态变化。结果表明:土壤容重随恢复时间的延长呈现降低的趋势,而土壤孔隙度和水分含量则随恢复时间的延长缓慢增大。土壤有机质和全N含量在恢复15年及原始林中最高,全P含量为恢复30年最低,原始林最高,全K含量则是恢复40年样地中最高。不同恢复阶段样地中,原始林中速效N含量最高,恢复15年样地中速效P含量最高,恢复40年样地中速效K含量最高。所有恢复阶段间pH值均无显著性差异,而阳离子交换量由高到低依次为恢复15年>原始林>恢复40年>恢复30年。土壤理化性质相关性分析显示,土壤容重与土壤全N、土壤全P、速效N、有机质具有显著相关性,而土壤孔隙度则仅与土壤pH值具有显著相关性,土壤水分含量则与土壤全N、速效N、阳离子交换量具有显著相关性。
Taking Pu’er monsoon evergreen broadleaved forest in different recovery stages of vegetation as the research object, the dynamic changes of soil physical and chemical properties with vegetation restoration were analyzed. The results showed that the bulk density of soil showed a decreasing trend with the prolongation of recovery time, while the porosity and moisture content of soil slowly increased with the recovery time. The contents of soil organic matter and total N were the highest in 15 years after restoration and in virgin forest, the lowest in all 30 years after restoration, the highest in virgin forest and the highest in total K after 40 years of restoration. In the different recovery stage plots, the content of available N in the primary forest was the highest, and the medium-available P content was the highest in the 15-year restoration plots. The medium-available K content was the highest in the 40-year restoration plots. There was no significant difference in pH between all recovery stages, while the highest cation exchange capacity was 15 years of recovery> virgin forest> 40 years of recovery> 30 years of recovery. Correlation analysis of soil physical and chemical properties showed that soil bulk density was significantly correlated with total N, total P, available N and organic matter, while soil porosity was only significantly correlated with soil pH. Soil moisture content was correlated with soil total N, available N, cation exchange capacity has a significant correlation.