闽南沿海山地火力楠中龄林疏伐的生物生产力效应研究  

Study on the Biological Productivity Effects of Thinning Middle-Aged Forest for Michelia macclurei Dandy in the Coastal Mountainous Areas of Southern Fujian

作　　者：李进兴 Li Jinxing(Tong'an Shuangxi State-owned Forest Farm,Xiamen 361100,Fujian,China)

机构地区：[1]福建省同安双溪国有林场,福建厦门361100

出　　处：《绿色科技》2024年第19期100-104,共5页Journal of Green Science and Technology

摘　　要：为提升闽南沿海山地火力楠人工生态林的质量和生态效能,对火力楠中龄林开展不同疏伐强度试验,从生态防护效能的角度出发,以林分生物生产力为评价指标,分析探讨了火力楠中龄林不同疏伐强度的效应,结果表明:适当疏伐可以明显促进火力楠中龄林的枝、叶的生长发育,有效改变林木冠长短、冠幅小的现象,林分生物结构得到明显改善,利于提升生态功能;疏伐强度对火力楠中龄林林分生产力有显著影响,但林分地上部生物量以及生物生产力并非随着疏伐强度的加大而增加,不论是哪个坡位,生物生产力最大的是中度疏伐,疏伐4年林分地上部生物生产力达3.628~4.075t/(hm^(2)·a),比疏伐处理的群体均值提升了5.47%~18.46%。综合不同坡位、不同疏伐强度的生物生产力对比分析,最适疏伐强度为中度疏伐即疏伐总株数的30%,保留林分密度1260株/hm^(2)。In order to improve the quality and ecological efficiency of artificial ecological forests of Micheliamac-clureiin the coastal mountains of southern Fujian,experiments were conducted on middle-aged forests of Michelia macclurei Dandy with different thinning intensities.From the perspective of ecological protection efficiency,the effects of different thinning intensities on middle-aged forests of MicheliamacclureiDandy were analyzed and ex-plored using stand biological productivity as the evaluation index.The results showed that proper thinning can significantly promote the growth and development of branches and leaves in middle-aged forests of Micheliamac-clurei Dandy,effectively changing the phenomenon of long and short crowns and small crown widths.The biolog-ical structure of the forest stands is significantly improved,which is conducive to enhancing ecological functions;The intensity of thinning has a significant impact on the productivity of middle-aged forest stands,but the aboveground biomass and biomass productivity of the forest stand do not increase with the increase of thinning intensity.Regardless of the slope position,moderate thinning had the highest biomass productivity,with the 2 aboveground biomass productivity of the 4a thinning forest reaching 3.628~4.075 t/(hm·a),an increase of 5.47%to 18.46%compared to the population average of thinning treatment.Based on the comparative analysis of biological productivity at different slope positions and thinning intensities,the optimal thinning intensity is mod-erate thinning,which accounts for 30%of the total number of thinning trees,while retaining a forest density of 1260 trees per hectare.

关 键 词：火力楠 生物生产力 抚育疏伐 闽南沿海山地 

分 类 号：S792.22[农业科学—林木遗传育种]