四川盆地浅丘区农林复合系统空间结构的景观生态学初步分析

Landscape Ecological Analysis of the Saecial Structure of Agroforestry in Hilly Regions in the Sichuan Basin

应用景观生态学的基本原理，对浅丘农区清水河小流域农林复合系统的结构进行了分析，表明浅丘农区水土保持林体系的营建，使该区农林结构发生了变化，使景观的复杂性提高，破碎度增大；同时林分景观生态结构的变化，使其生物量与养分分配发生了变化，均匀性降低，优势度提高；尤以混交林最为突出。这些为生物种群提供了复杂多样的生态环境，提高了生物的多样性，促进了系统中物质和能量等的充分循环利用．

Landscape ecological analysis of the spacial structure of agroforestry in hilly regions in the Sichuan Basin were carried out in this paper.It has been shown that the structure of agroforestry in these regions were changed after the soil and water conservation forest system had been set up. These changes increased complicacy and fragmentation of the landscape,nd resulted in varlations in its allocated structure of biomass and nutrient,namely,the decrease of homogeneousness and the increase of diversity, especially in mixed forest,thus providing various kinds of ecological environment for biological populations, enhancing the diversity in biology, and promoting more effective circulation and use of substances and energy in agroforestry.