抚育间伐强度对杉木林生长的影响

Effect of Thinning Intensity on the Growth of Cryptomeria japonica Forests

以融水苗族自治县贝江河林场为研究地点,通过监测杉木林树高、胸径、材积和林木生物量等指标,探讨了抚育间伐强度对杉木林生长的影响。结果表明:在不同的间伐强度下,杉木的各项生长指标和生物量均受到显著影响。特别是在30%的间伐强度下,杉木的生长表现最为明显。适度的抚育间伐可以促进杉木树高、胸径、材积和生物量的增长,但过高的间伐强度可能导致不利影响。指出了随着间伐强度的增加,部分处理组的根部、叶部、枝部和整株生物量均呈现出增加的趋势,这表明适度间伐可以促进杉木的生长和生物量积累。研究结果为杉木林的科学抚育提供理论依据。

In this study,tree height,diameter at breast height,volume and biomass of Cryptomeria japonica were measured in Beijianghe Forest Farm,Guangxi Rongshui Miao Autonomous County.The effect of thinning intensity on the growth of Cryptomeria japonica forest was studied.The results showed that under different thinning intensities,the various growth indicators and biomass of Cryptomeria japonica were significantly affected.Especially at 30%thinning intensity,the growth performance of Cryptomeria japonica is most significant.Moderate nurturing and thinning can promote the growth of height,diameter at breast height,volume,and biomass of Cryptomeria japonica trees,but excessive thinning intensity may lead to adverse effects.The results indicate that moderate thinning intensity has a positive impact on the growth of Cryptomeria japonica forests.With the increase of thinning intensity,the biomass of roots,leaves,branches,and whole plants in some treatment groups showed an increasing trend,indicating that moderate thinning can promote the growth and biomass accumulation of Cryptomeria japonica.This study provides a theoretical basis for the scientific nurturing of Cryptomeria japonica forests.