抚育间伐对人工柳杉林分生长的影响  

The Impact of Nurturing Thinning on the Growth of Artificial Cryptomeria Stands

作　　者：吴丽丽 邓长贺 雷雨 WU Lili;DENG Changhe;LEI Yu(Forestry Bureau of Qixingguan District,Bijie City,Bijie 551799,GuiZhou,China;State Forestry and Grassland Administration Key State-owned Forest Area Forest Resources Monitoring Center,Jiagedaqi 165000,Heilongjiang,China)

机构地区：[1]毕节市七星关区林业局,贵州毕节551799 [2]国家林业和草原局重点国有林区森林资源监测中心,黑龙江加格达奇165000

出　　处：《林业科技情报》2024年第4期137-139,共3页Forestry Science and Technology Information

摘　　要：为探究了不同间伐强度对人工柳杉林分生长的影响,对人工柳杉林分实施抚育间伐(用伐后郁闭度体现间伐强度),伐后郁闭度为0.50、0.60、0.70、0.85(对照,未间伐),3a后研究不同伐后郁闭度对人工柳杉林分生长的变化。结果表明:抚育间伐可以有效促进林分生长,具体表现在林分平均胸径、林分平均高、林分断面积、林分平均单株材积和林分蓄积5个方面,且研究发现,在抚育间伐措施中,当伐后郁闭度为0.5~0.6时林分生长效果最佳,其中0.5的伐后郁闭度的蓄积生长量最高,显著高于其余各处理。In order to investigate the effect of different thinning intensities on the growth of artificial Cryptomeria stands,nurturing thinning was carried out on the artificial Cryptomeria stands(using post cutting canopy closure to reflect thinning intensity),with post cutting canopy closure of 0.50,0.60,0.70,0.85(control,no thinning).After 3a,the changes in the growth of artificial Cryptomeria stands under different post cutting canopy closure were studied.The results showed that thinning and nurturing can effectively promote forest growth,manifested in five aspects:average diameter at breast height,average height,cross-sectional area,average volume per plant,and forest volume.The study also found that among thinning and nurturing measures,the best growth effect was achieved when the post cutting canopy closure was between 0.5 and 0.6,with the highest volume growth observed at 0.5 canopy closure,significantly higher than the other treatments.

关 键 词：抚育间伐 柳杉 林分生长 

分 类 号：S791[农业科学—林木遗传育种]