马尾松林分结构对枯落物层和土壤层水文效应的影响  

Effect of Pinus massoniana Stand Structure on Hydrological Effects of Litter Layer and Soil Layer

作　　者：袁秀锦 肖文发[2,3] 潘磊[4] 王晓荣[2,4] 胡文杰[4] 崔鸿侠[4] 雷静品[1,3] YUAN Xiu-ji;XIAO Wen-fa;PAN Lei;WANG Xiao-rong;HU Wen-jie;CUI Hong-xia;LEI Jing-pin(Key Laboratory of Forest Silviculture of National Forestry and Grassland Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China;Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Research Institute of Forest Ecology,Environment and Protection,Chinese Academy of Forestry,Beijing 100091,China;Collaborative Innovation Center of Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Hubei Academy of Forestry,Wuhan 430075,Hubei,China)

机构地区：[1]中国林业科学研究院林业研究所,国家林业和草原局林木培育重点实验室,北京100091 [2]中国林业科学研究院森林生态环境与保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091 [3]南京林业大学,南方现代林业协同创新中心,江苏南京210037 [4]湖北省林业科学研究院,湖北武汉430075

出　　处：《林业科学研究》2020年第4期26-34,共9页Forest Research

基　　金：国家“十二五”科技支撑项目(2015BAD07B0403)。

摘　　要：[目的]通过监测不同林分结构马尾松林枯落物层和土壤层的水文效应,探究影响其效应的主要结构因子及相关关系,为马尾松林抚育经营管理提供参数。[方法]在三峡库区九岭头林场选取9块马尾松林样地,调查其林分结构参数,即叶面积指数、胸径、冠幅、角尺度、Margltf丰富度指数及林木竞争指数等,分别采用室内浸泡法和环刀法对枯落物层和土壤层持水特性进行定量研究,运用Pearson相关分析、主成分分析、冗余分析等方法分析林分结构对枯落物层和土壤层水文效应的影响及其相互关系。[结果]林木竞争指数、叶面积指数、林分密度与土壤最大持水量和枯落物层总有效蓄水量呈显著正相关(P<0.05),Margltf丰富度指数与土壤最大持水量呈显著正相关,而与枯落物层总有效持水量不相关。林分结构的变量组合分别解释了马尾松林枯落物层和土壤层水文效应的54.06%和61.80%。[结论]林分结构与枯落物层和土壤层水文效应密切相关,即林木竞争力越强,林木生长状况越好,林分蓄积量越多,枯落物层和土壤层的水文效应越好。[Objective] By monitoring the hydrological effects of litter layer and soil layer of Pinus massoniana forest with different stand structure, the main structural factors and their correlations were explored. [Method] In this study, nine P. massoniana forest plots were selected from Jiulingtou Forest Farm in the Three Gorges Reservoir area to investigate the stand structure parameters, such as leaf area index, DBH, crown width, angle scale, Margltf richness index and forest competition index, etc. The water-holding characteristics of the litter layer and the soil layer were quantitatively studied by the indoor soaking method and the ring knife method, respectively. Pearson correlation analysis, principal component analysis, redundant analysis and other methods were used to analyze the relationship between stand structure and hydrological effects of litter layer and soil layer. [Result] The results showed that the forest competition index, leaf area index and stand density were significantly positively correlated with the maximum water holding capacity of the soil and the total effective water storage capacity of the litter layer(P<0.05). The Margltf richness index was significantly positively correlated with the maximum water holding capacity of the soil,but not with the total effective water holding capacity of the litter layer. The variable combination of stand structure explained 54.06% and 61.80% of the hydrological effects of the litter layer and soil layer of P. massoniana forest, respectively. [Conclusion] The stand structure is closely related to the hydrological effects of the litter layer and the soil layer, that is, the stronger the forest tree competitiveness, the better the forest growth condition, the more the stand accumulation amount, the better the hydrological effect of the litter layer and the soil layer.

关 键 词：林分结构 水文效应 Pearson相关分析 主成分分析 冗余分析 

分 类 号：S715[农业科学—林学]