摘要
土壤物理结构的优化也是退耕还林工程建设的目标之一.通过对退耕还林不同植被恢复类型土壤容重和孔隙度的测定,并与农耕地比较,探讨植被恢复后土壤容重和孔隙度的变化特征.结果表明,土壤容重的改良并非退耕后植被恢复初期就能实现的,土壤孔隙度也远不在土壤适宜范围之内,不同植被恢复类型对土壤容重和孔隙度的改良存在明显不同;土壤物理结构的改良尚需植被恢复后对土壤—植被系统科学合理的经营和持续的保护才能实现.
The optimization of soil physical structure is also one of the objectives of the project of returning farmland to forestry. Through the determination of soil bulk density and porosity of different types of vegetation restoration after the process of returning farmland to forestry,and their comparison with farmland,the paper discusses the changing characteristics of soil bulk density and porosity after vegetation restoration. The results show that the improvement of soil bulk density is not realized at the early stage of vegetation restoration,the soil porosity is not in the appropriate range at all. There are significant differences in soil bulk density and porosity between different vegetation restoration types.The soil physical structure improvement depends on reasonable management and sustainable protection of the soil-vegetation system after vegetation restoration.
出处
《成都大学学报（自然科学版）》
2017年第3期325-327,共3页
Journal of Chengdu University（Natural Science Edition）
关键词
植被恢复
土壤容重
土壤孔隙度
vegetation restoration
soil bulk density
soil porosity
