海风降雪对黑松沿海防护林危害分析

The Harm Analysis of Sea Wind and Snowfall to Pinus thunbergii Coastal Shelter Forest

本文以风灾雪灾较为严重的烟台市牟平区黑松沿海防护林为研究对象,重点探讨了防护林带距离海岸线纵向深度与受害程度的关系,得出几点主要结论:(1)黑松沿海防护林降风减风作用明显,在黑松防护林带纵向宽600m时,海风对林木正常生长基本不再产生影响;(2)在黑松沿海防护林中,雪压造成的灾害呈现单峰抛物线趋势变化,建议在林带纵向宽度200m以外,采取适当降低造林密度或其他措施;(3)黑松沿海防护林最佳营建宽度为600m。

the shelterbelt coastal forest of Plnus thunbergii with wind and snow damage in Muping district of Yantai city were taken as research object in this article. The relationship between longitudinal depth from shelterbelt to coastline and damage degree was the main research content. Results obtained were as follow, （1） the effects of wind reduction for sheltered coastal forests were significant. The sea breeze had no effect on the normal growth when longitudinal depth was 600m; （2） the damage caused by snow pressure showed a quadratic curve, which suggested that forestry density should be decreased or other measures when longitudinal depth was beyond 200m; （3） the optimal width ofPinus thunbergii coastal shelterbelt was 600m.