顺德森林改造区不同林分土壤环境质量研究

土壤质量是环境质量的重要组成部分,是指在一定的时间和空间范围内,土壤维持生态系统的生产力和动植物健康而不发生退化及其它生态问题与环境问题的能力。土壤质量指标是表示从土壤生产潜力和环境管理的角度监测和评价土壤物理、化学和生物学性质、土壤过程以

Study on the Soil Environmental Quality of Forest Rehabilitation in Shunde, Guangdong Province

By comparison the soil physical and chemical characteristics and heavy metal content of 6 forest rehabilitation sites in Shunde District, Foshan City, Guangdong Province, were studied and analyzed. The results showed that the soil bulk density was heavy in all the 6 sites. The soil structure and holding water-fertility capability was the best in Jun'an followed by Longjiang and Daliang was the worst. The soil organic matter, total N, cation exchange capacity, base cation concentration and pH value showed a tendency to reduce with the different ways of silviculture from no rehabilitation to rehabilitate completely. The soil nutrient elements were losed slowly in forest rehabilitation prophase. In all sites, the soil cadmium(Cd) and plumbum(Pb) contents overstepped third scope of environmental quality standard for soils (GB 15618-1995) and nature background value respectively, reached heavier pollution and lightly pollution. The environment loading capacity of soil for heavy metals did not show the obvious correlation with the silviculture methods. In the initial stages of forest rehabilitation, the soil environment qualities were not diverged from that of before rehabilitation. Planting native broadleaf tree species had great significance to protect forest soil from heavy metal pollution and raise environment capacity.