文档介绍：混交林的改土效益及其在防止地力衰退上的应用
王楚荣1 陈红跃2 许炼烽3
(1:珠海市西区园林所,珠海 519145;2:华南农业大学林学院;3:国家环保总局华南环境科学研究所)
摘要讨论了人工混交林对林地土壤理化性质、微生物及水土保持等方面的改良和促进作用。针对目前人工纯林地力衰退的问题,提出了混交林可作为防止地力衰退的途径,并对混交林应用上的有关问题作了探讨。
关键词混交林;改土效益;地力衰退
Benefits of Improving Soil Productivity from Mixed Plantation and Their Preventive Roles in the Depletion of Soil Productivity. Wang Churong (Park and Garden Management Department of West Region, Zhuhai 519145), Chen Hongyue(College of Forestry, South China Agricultural university, Guangzhou 510642), and Xu Lianfeng (South China Institute of Environmental Sciences, SEPA, Guang zhou 510655). Soil & Environ Sci, 1999, 8(1): 58~60
Beneficial changing and improvement of the soil physical and chemical properties, anic properties and erosion control capacity in the mixed plantations are discussed in this paper. Mixed plantation can be used to prevent soil productivity from deterioration in the repeated pure plantations. Some problems of the application of mixed plantation are also discussed in this paper.
Key words mixed plantation; benefit of improving soil productivity; depletion of soil productivity
人工林的地力衰退,包括土壤肥力的下降及其林分生产力的下降,已越来越受到人们的关注[1~4]。防止这种衰退的途径有多种,其中重要的一种就是营造混交林,因为混交林能较好地维持和提高地力[5, 6]。
1 混交林的改土效益
混交林与土壤理化性状
有关研究[7~9]表明:混交林土壤具有较纯林更疏松、通透性更佳、保水力更强等特点。如马尾松(Pinus massoniana)、杉木(Cunninghamia lanceolata)%~%;%~%,A、B层土壤自然含水量分别高