【摘要】 <正> 前言川西亚高山林区是四川主要林业生产基地。从植被演替的角度了解川西森林采伐后的恢复途径及其前景,对于研究长江上游地区的生态平衡,制定森林资源开发规划和从事林业生产都有一定理论价值和实际意义。这方面前人已作过不少研究。为研究迹地植被演替规律,作者于1983—1984年对川西长江上游岷江流域之米亚罗地区的迹地植被进行了调查。更多还原

【Abstract】 A secondary succession of vegetation on clearcut sites was studied in Western Sichuan. The coverage and biomass of trees, shrubs and herbs at different stages of succession have been surveyed. The result showed that the coverage and biomass of trees and shrubs have changed greatly in the succession. After the forest was cut, raspherry’s （Rab（?）sldaeus） coverage was the greatest during the first 0—15 years, Red birch’s coverage was the greatest during 16—29 years, while the total coverage of other shrubs was greater than those of raspberry and red birch during 10—20 years.The following empirical formulas with good fitness have been used:C_tree=0.803+2.437^T1/2 （r=0.88 p<0.01）C_shrub=10.481+10.392T+0.373T² （r=0.87 p<0.01）C_borb=0.489+87.001/T （r=0.93 p<0.01）C₂ biomass, kilogram/ha T: time period, yearAccording to the curves, the succession of vegetation can be divided into four stages: herb stage: 0—3 years; raspberry stage: 4—10 year; shrub and small broad-leaved forest stage: 11—20 years, and small broad-leaved forest stage: 21—29 years.更多还原