湘东丘陵区马尾松低质低效次生林改造经营模式研究

在湖南省茶陵县设置了低质低效马尾松次生林改造试验基地，面积为10hm^2。研究分析了其低质低效的形成原因。根据多项改造技术措施及改造措施因素的对比筛选试验结果，确定了最优改造经营技术，并依此建立了改造经营模式。通过5年的定位观测研究，试验林在林分结构，林分生产力，林分涵养水源，固持土壤等方面均较对照林分有较大幅度的提高，改造成效非常显著。

The transform and management model of low-quality low-effect Pinus massoniana secondary forest in the hills in the east of Hunan province

The experimental are of low-quality low-effect Pinus massoniana secondary forest of Changling county in Hunan province was 10hm 2.The reasons for the low-quality low-effect were analyzed.Based on the contract the reaults of experiments of several transform technology and transform countermeasure factors,the best transform management technology and model were recommended.Through the 5 years locative observation research,the experimental forest by the transform model had marked success in stand construction,stand product ability,stand conserve water and soil ability.