低效林是国家“七·五”期间长江上游防护林建设前期研究中提出来的新概念,它不同于次生林,也区别于低产林。据研究,低效林指的是森林的总体功能低下,它是人们对森林的生态系统和经济系统的综合评价指标,其表现类型有:生态效益高,经济效益低;生态效益低,经济效益高;生态和经济效益均低。为此,我们在乌江流域低效林改造试验示范区按 The inefficient forest is a new concept proposed in the preliminary study of the construction of the shelterbelt in the upper reaches of the Yangtze River during the “Seventh Five-year Plan” period. It is different from the secondary forest and from the low-yield forest. According to the research, low efficiency forest means the overall low function of forest, which is a comprehensive evaluation index of people’s ecosystem and economic system of forest. Its performance types are: high ecological benefit, low economic benefit; low ecological benefit and economic benefit High; ecological and economic benefits are low. To this end, we are in the Wujiang River Basin low-efficiency forest reform demonstration zone press