Research on the Pollution Hazard of Municipal Solid Waste in China and its Prevention and Control Legal Countermeasures

摘要

Studying the mechanisms between factors of stand structure and the environment is an importantway to research and interpret the complex relationships between stand development and theenvironment. We investigated 113 sample plots of four typical forest types at Badaling forest farm inBeijing, and analysed stand soil structure, the correlations between stand structure and environmentalfactors, and the spatial distribution of soil nitrogen (TN) content and soil alkali-hydrolyzale (AN)content. The results showed that the typical forest types had significant differences in soil physicaland chemical properties; the stand soil status of broad-leaved forest and scrubland was superior tothat of the coniferous forest and the coniferous and broad-leaved mixed forest. The soil physicalstructure affected the stand structure more than the soil chemical structure, and stand structurevariation caused by the soil factors was more important than the topographic factors in all the fourtypical forest types. Spatial heterogeneity in TN and AN was evidenced, and the overall N content waslow.