采伐对海南霸王岭热带山地雨林乔木碳储量影响初步研究

Analysis on Early Stage Trees Carbon Storage Change of Tropical Montane Rain Forest in Bawangling of Hainan Island

以海南岛霸王岭热带天然山地雨林原始林为对象,实施了择伐强度为0.0%(未采伐)、30.7%(低择伐强度)、45.3%(中择伐强度)、53.5%(高择伐强度)4种试验,观测和分析了择伐后13年间各种试验类型的乔木总碳储量、枯死木碳储量、进界木碳储量、保留木碳储量、树种组碳储量和径级碳储量的变化趋势。结果表明:高强度择伐林分枯死木碳储量比率最大,中强度择伐林分枯死木碳储量比率最低;低强度择伐和未择伐林分的保留木碳储量增长率、总碳储量增长率高于中高强度择伐林分;进界木碳储量比率随择伐强度的增大而增大;45.0%左右采伐强度是树种组碳储量增长较理想的强度;45 cm及以下径级保留木各径级碳储量增长率随择伐强度的增大而增大,45 cm以上径级保留木各径级碳储量增长率与择伐强度关系不明显。

Taking virgin tropical montane rain forest in Bawangling of Hainan Island as study object, four selective cutting experiments of 0.0% （no cutting）, 30.7% （ low selective cutting intensity）, 45.3% （ middle selective cutting intensity） and 53.5% （ high selective cutting intensity） was implemented. The change tendency of carbon storage of forest stand, dead trees, remained trees, ingrowth trees, tree species group and diameter class thirteen year after cutting was observed and analyzed. The results show that the carbon storage rate of dead trees in forest stand with high selective cutting intensity is the biggest, the carbon storage rate of dead trees in forest stand with middle selective cutting intensity is the least; the growth rates of carbon storage of re- mained trees and forest stand with low selective cutting intensity and no cutting are higher than that of the others; the carbon storage rate of ingrowth trees increases along with the selective cutting intensity increase; cutting intensity of 45.0% is an ideal to improve carbon storage increasing of trees group; growth rate of carbon storage of remained trees under diameter class of 45 cm increases along with selective cutting intensity increase, the growth rate of carbon storage of remained trees over diameter class of 45 cm isn＇ t related with selective cutting intensity.