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为弄清间伐对海岸林内环境因子 ,进而对海岸林天然更新的影响 ,在黑松海岸林内进行了 4种不同强度的块状间伐试验 .林分间伐后 ,对更新状况和环境因子进行了连续观测 .结果表明 ,间伐可以改善林内光环境、提高土壤的含水量、加强空气流动、促进枯枝落叶的分解等 .4 0年生的黑松海岸林 5 0 %间伐处理后 (密度为 15 0 0株·hm-2 ,林冠开阔度 >30 % )不会对海岸林本身造成风害 ,也不会对防护功能产生较大影响 ,但却能为黑松海岸林天然更新提供良好的生态环境 .试验结果证实了间伐产生的林隙内日本黑松的更新规律 ,提出间伐可作为同龄黑松海岸林向复层、异龄海岸林演化的主要经营措施 .
In order to understand the influence of thinning on the environmental factors in coastal forests and further the natural regeneration of coastal forests, four different intensities of block thinning experiments were carried out on the coasts of Pinus thunbergii forest. After the thinning, the renewal status and environmental factors were continuously The results showed that thinning could improve the light environment in the forest, increase the soil water content, enhance the air flow and promote the litter decomposition.40% of the Pinus thunbergii forest 50% thinning (density 15 000 Hm-2, canopy openness> 30%) did not cause any wind damage to coastal forest itself, nor did it have a significant impact on the protection function. However, it provided a good ecological environment for the natural regeneration of the coast of Pinus thunbergii forest. The test results confirmed the renewal rule of Japanese black pine within the gaps resulting from thinning and proposed that the thinning could be used as the main management measure for the forest-facing stratification and the evolution of aral shrub on the black pine coast of the same age.