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| 南洞庭湖湿地龙虎山次生林林分空间结构研究 | |
| 引用本文： | 李建军,陈端吕,谭骏珊,臧颢,曹旭鹏.南洞庭湖湿地龙虎山次生林林分空间结构研究[J].中国农学通报,2012,28(13):132-138. |
| 作者姓名： | 李建军 陈端吕 谭骏珊 臧颢 曹旭鹏 |
| 作者单位： | 1. 中南林业科技大学计算机与信息工程学院,长沙410004;中国林业科学研究院资源信息研究所,北京100091 2. 湖南文理学院资源环境与旅游学院,湖南常德,415000 3. 中南林业科技大学计算机与信息工程学院,长沙,410004 |
| 基金项目： | 国家自然科学基金“洞庭湖湿地森林生态系统经营的空间途径研究”（31070568）; 湖南省自然科学基金重点项目“基于多目标优化的水源涵养林空间结构模式研究”（10JJ2020）; 湖南省教育厅重点科研项目“基于复杂约束的次生林多目标结构优化研究”（11A128） |
| 摘 要： | 为了优化洞庭湖湿地典型森林类型林分空间结构，充分发挥湿地森林涵养水源、保持水土和调节气候等多项功能，以南洞庭湖湿地龙虎山林场次生林群落为研究对象，依据现代森林生态和森林经理学原理，在现有林分空间结构分析方法的基础上，应用混交度、大小比数分析林分空间结构的树种隔离程度和林木大小分化程度，并提出应用角尺度和空间密度指数在分布角度和林木分布密度上分析林分空间分布格局的新方法，克服了传统研究中用角尺度不能确切反映树木个体之间距离的不足。结果表明：南洞庭湖龙虎山林场次生林林分1、2、3、4的混交度分别为0.29、0.43、0.46、0.16，属于弱度混交与中度混交的过渡类型，树种隔离程度不高，与多次人为干扰有关；平均大小比数分别为0.45、0.43、0.7、0.22，其先锋树种生长优势明显；平均角尺度分别为0.65、0.47、0.53、0.40，平均空间密度指数为0.65，其值分布在0.485，0.806]的区间，总体分布格局呈均匀分布向随机分布演替的趋势，接近于近自然的随机分布状况。龙虎山林场次生林群落林分空间结构是洞庭湖湿地区域森林生态系统空间结构恢复和近自然经营研究的较理想的森林群落。 |
| 关 键 词： | 分形维数 分形维数 |
| 收稿时间： | 2011/11/15 0:00:00 |
| 修稿时间： | 2011/12/28 0:00:00 |
The Stand Spatial Structure Research of the Secondary Forest in Longhu Mountain in Southern Dongting Lake Wetland |
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| Li Jianjun , Chen Duanlv , Tan Junshan , Zang Hao , Cao Xupeng.The Stand Spatial Structure Research of the Secondary Forest in Longhu Mountain in Southern Dongting Lake Wetland[J].Chinese Agricultural Science Bulletin,2012,28(13):132-138. | |
| Authors: | Li Jianjun Chen Duanlv Tan Junshan Zang Hao Cao Xupeng |
| Institution: | 1College of Computer and Information Engineering, Central South University of Forestry and Technology, Changsha 410004; 2Research Institution of Resource Information, Chinese Academy of Forestry Science, Beijing 100091; 3Environment and Tourist College, Hunan University of Arts and Science, Changde Hunan 415000) |
| Abstract: | In order to optimize spatial structure of forest types of the Dongting Lake wetland, make full use of water conservation, soil conservation, climate regulation and other functions of the wetland forest, the author took the forestry farm secondary forest in Longhu Mountain in southern Dongting Lake wetland as the study area. Based on the theory of modern forest ecology and forest management and the existing stand spatial structure analysis methods, the author made use of mingling index and neighborhood comparison to analyze the stand tree species space segregation and the degree of size differentiation of individual trees, eventually, came up with a new method which was based on uniform angle index and spatial density index to analyze stand spatial distribution pattern, which made up for a shortage that traditional research methods could’t exactly reflect individual distance between the trees by neighborhood pattern. The results showed that the mingling indexes of southern Dongting Lake Longhu Mountain forest farm secondary forest sample plot 1, 2, 3, 4 were 0.29, 0.43, 0.46, 0.16, belonging to the transitional type of the mingling of low and moderate and the segregation of tree species was not high, which was due to human interferences with times; that the average neighborhood comparison were 0.45, 0.43, 0.7, 0.22, the grow superiority of the volunteer was obvious; and that the average uniform angel indexes were 0.65, 0.47, 0.53, 0.40, tree distribution pattern was on the between of ball and random distribution, closed to natural random distribution. So the stand spatial structure of Longhu Mountain forest farm secondary forest community was appropriate to research recover the forest ecosystem spatial structure and manage close to nature in the wetland area of the Dongting Lake. |
| Keywords: | southern Dongting Lake wetland mingling index neighborhood comparison uniform angle index spatial density index |
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