间伐对杉木人工林水土保持功能影响的研究进展  

Research advance on effects of thinning on soil and water conservation functions of Chinese fir plantations

作　　者：郭昊澜 赵子豪 连晓倩 张婷 吴鹏飞[1,2] GUO Haolan;ZHAO Zihao;LIAN Xiaoqian;ZHANG Ting;WU Pengfei(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Fujian Provincial Colleges and University Engineering Research Center of Plantation Sustainable Management,Fuzhou,Fujian 350002,China)

机构地区：[1]福建农林大学林学院,福建福州350002 [2]人工林可持续经营福建省高校工程研究中心,福建福州350002

出　　处：《亚热带农业研究》2021年第4期252-257,共6页Subtropical Agriculture Research

基　　金：国家自然科学基金项目(31870614);福建省自然科学基金重点项目(2020J02029);福州市科学技术局科技计划项目(2021-P-035)。

摘　　要：[目的]分析间伐对杉木人工林水土保持功能影响的研究现状,为合理间伐杉木林,实现生态与经济效益平衡的可持续发展提供依据。[方法]归纳总结了国内外文献,综述了杉木人工林林冠层、林下植被层、凋落物层、土壤层及根系的水土保持功能,以及间伐对其产生的影响规律。[结果]适度间伐可降低杉木人工林林分密度,减小林冠层降水截流量,并增强林内光照,提高林下植被物种多样性和覆盖度;还能加快凋落物分解速率,促进林分养分循环及半分解层储量的增加。间伐后杉木人工林林下植被根系密度增大,杉木根系伸长、吸水能力增强,从而改善土壤结构,提高其持水能力。[结论]适度间伐在调控林木生长的同时,还能提高水土保持能力,有利于维持林木长期生产力,但间伐通过维持水土保持功能提高林分生产力内在机制的研究仍有待加强。[Purpose] In order to provide a basis for reasonable thinning of Chinese fir and achieving the sustainable development by balancing ecological and economic benefits, the research process was reviewed on the effects of thinning measures on the water and soil conservation functions of Chinese fir plantations in this paper. [Method] The relevant literature at home and abroad was summarized, and the water and soil conservation functions of Chinese fir plantation, including the canopy, understory vegetation layer, litter layer, soil layer and root layer and the influence law of thinning measures on these components were reviewed. [Result] Moderate thinning reduced the density of Chinese fir plantation and the rainfall interception of canopy, but increased the illumination intensity under the canopy. Then both of the species diversity and coverage of understory vegetation were increased. Meanwhile, the decomposition rate of litter was accelerated, the nutrient cycle of stand was promoted, and the storage of semi-decomposition layer and its water holding capacity was increased separately. With the increasing of Chinese fir plantation vegetation root density and tree root elongation, the ability of root to absorb water was enhanced, the soil structure was improved and the soil water holding capacity was enhanced. [Conclusion] Moderate thinning can not only regulate the growth of trees, but also improve the ability of soil and water conservation, which is more conducive to the maintenance of long-term forest productivity. However, the internal mechanism of improving stand productivity by maintaining soil and water conservation through thinning remains to be further studied.

关 键 词：杉木人工林 间伐 水土流失 降水截留 涵养水源 

分 类 号：S718.5[农业科学—林学]