平潭岛四种主要沿海防护林生态效益评价

发布时间：2018-01-15 10:27

本文关键词：平潭岛四种主要沿海防护林生态效益评价　出处：《福建师范大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文以福建省平潭岛四种主要沿海防护林为研究对象,通过区域标准样地调查与室内实验相结合,对防护林树种主要生态效益进行观测。以层次分析法为指导,建立综合生态效益评价体系,系统地评价平潭岛沿海防护林生态效益。以评价体系为依托,运用“边际效益”理论对平潭岛生态效益最大化进行模拟。研究主要结论如下：(1)平潭岛沿海防护林林下土壤呈酸性,肥力缺乏,土壤普遍贫瘠；生物量：湿地松林(312.16t/hm2)木麻黄林(189.82t/hm2)黑松林(146.28t/hm2)台湾相思林(87.71t/hm2)；防护林对温度、湿度、风速均有较大的调节作用,其中对风速调节最为明显。(2)凋落物持水量随着浸水时间增加而增大,吸水速率则随着浸泡时间增加而递减。凋落物持水量：台湾相思林木麻黄林黑松林湿地松林；林分土壤蓄水量：黑松林台湾相思林木麻黄林湿地松林。(3)防护林土壤碳含量和碳储量均随土层深度增加而减少；树种平均碳含量：黑松林(49.2%)湿地松林(49.07%)台湾相思林(48.59%)木麻黄林(45.55%)；固碳释氧量排序：湿地松林木麻黄林黑松林台湾相思林。(4)建立了包含四项准则层,十项指标层的平潭岛沿海防护林综合生态效益评价体系。以评价模型为基础,四种防护林综合生态效益排序为：木麻黄林(1.1623》湿地松林(1.0758)黑松林(1.0059)台湾相思林(0.7619)。(5)运用“边际效益”理论,模拟最大生态效益下各树种面积,结果为：木麻黄林(31.03%)、台湾相思林(17.27%)、湿地松林(51.69%),若以此面积配比种植防护林,生态效益将高出现有生态效益13.78%。
[Abstract]:In this paper, four main coastal shelterbelts in Pingtan Island, Fujian Province are taken as the research objects. The main ecological benefits of shelterbelt species are observed by combining the investigation of regional standard plots with indoor experiments, and guided by the Analytic hierarchy process (AHP). To establish a comprehensive ecological benefit evaluation system to systematically evaluate the ecological benefits of the coastal protection forest of Pingtan Island based on the evaluation system. Using the "marginal benefit" theory to simulate the ecological benefit maximization of Pingtan Island. The main conclusions are as follows: 1) the soil under the shelterbelt forest of Pingtan Island is acidic, lacking fertility, and the soil is generally barren; Biomass: Pinus elliottii forest 312.16 t / hm2) Casuarina equisetifolia forest 189.82 t / hm2) Black pine forest 146.28 t / hm2) Taiwan Acacia forest (. 87.71 t / hm 2; The shelterbelt has a great effect on temperature, humidity and wind speed, among which the regulation of wind speed is the most obvious. 2) the water holding capacity of litter increases with the increase of soaking time. The water absorption rate decreased with the increase of soaking time. The litter water holding capacity: Taiwan acacia forest Casuarina equisetifolia forest Pinus elliottii forest Pinus elliottii forest; Stand soil water storage: black pine forest, Taiwan Acacia forest, Pinus elliottii forest, Pinus elliottii forest, Pinus elliottii forest, soil carbon content and carbon storage decreased with the increase of soil depth; Average carbon content of tree species: Pinus tabulaeformis 49.2) Pinus elliottii 49.07) Taiwan Acacia forest 48.59) Casuarina equisetifolia forest 45.5555; Carbon sequestration order: Pinus equisetifolia forest, Pinus equisetifolia forest, Taiwan acacia forest. The evaluation system of comprehensive ecological benefit of coastal shelterbelt in Pingtan Island is based on the evaluation model. The order of comprehensive ecological benefit of four kinds of shelterbelts is: Casuarina equisetifolia forest 1.1623 > Pinus elliottii forest 1.0758) Pinus tabulaeformis forest 1.0059) Acacia acacia forest in Taiwan 0.7619 ~ (5). Apply the theory of "marginal benefit". The results showed that the area of tree species in Casuarina equisetifolia forest was 31.033.The acacia forest in Taiwan was 17.27m, and the pine forest was 51.69cm). If the protective forest is planted with this proportion of area, the ecological benefit will be 13.78%.
【学位授予单位】：福建师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X826

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