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马尾松(Pinus massoniana Lamb)是我国南方主要飞播造林树种之一,我省有大面积马尾松飞播林分,进行马尾松飞播林不同密度林分间伐始期、间伐强度、间隔期、抚育间伐综合效果定位试验研究,选择最优间伐方案用于生产实践,使马尾松飞播林速生、丰产、优质,是本试验的基本目的。本文根据马尾松飞播林3个试验区,27个固定样地,5年的观测数据,对马尾松飞播林间伐起始期、间伐强度、间隔期等进行统计分析。结果表明:马尾松飞播林宜在飞播后8年进行第一次间伐;不同间伐强度与直径生长、单株材积生长呈正相关。林分密度与直径生长,单株材积生长呈负相关;与林分材积增长呈正相关;间伐间隔期以3年为宜。
Pinus massoniana Lamb is one of the main aerial seeding afforestation species in South China. There is a large area of aerial seeding of Pinus massoniana Lamb in our province, and the effect of thinning intensity, interval and tending thinning on the density of Pinus massoniana Lamb. Positioning test research, select the optimal program for the production of thinning practice, the Masson Pine aerial seeding fast, high yield, high quality, is the basic purpose of this experiment. Based on the observation data of 3 plots of aerial plantation of Masson pine, 27 fixed plots and 5 years observation data, the initial period, the thinning intensity and the interval of aerial felling of aerial seeding of Masson pine were analyzed statistically. The results showed that the first thinning of Pinus massoniana forest should take place at 8 years after aerial seeding. Different thinning intensities had positive correlation with diameter growth and single plant volume growth. Stand density was negatively correlated with diameter growth and volume growth per plant, and was positively correlated with stand volume growth; interval interval was 3 years.