天保工程对双丰林区27号林班森林蓄积量的影响

【作者】 王巍；

【导师】 王庆贵； 王庆善；

【作者基本信息】 黑龙江大学 ， 农业硕士（专业学位）， 2018， 硕士

【摘要】 天保工程是我国现阶段的天字号生态保护工程,对我国林业的繁荣和可持续发展做出来重要贡献,是一项惠及子孙后代的重大措施。在全球气候急剧变化的今天,深入研究天保工程对森林蓄积量的影响,确定其变化规律及影响因素是亟待解决的问题。本文以双丰林业局地区27号林班为例,基于双丰林业局15年的工作数据,以五年为一个时间单位,深入了解天保工程实施后,双丰林业局地区27号林班森林蓄积总量,天然林蓄积量,人工林蓄积量的变化趋势和森林乔木生物量因子的变化规律以及影响它们变化的主要环境因子。本文主要得出了以下结论:(1)自天保工程实施后,双丰林业局地区27号林班森林资源得到了显著改善。15年间,累计增加森林蓄积量4483m~3。此外,天然林蓄积量得到了更加显著的增加,累计增加6092m~3。这主要是由于自天保工程实施后,双丰林业局地区大力发展天然林资源的保护,增加天然林在地区的占比,同时减少人工林的相对比重。(2)天保工程开展的15年间,双丰林业局地区27号林班森林郁闭度,森林乔木净生长速率,乔木平均树高以及乔木平均胸径皆得到了显著的提高。(3)对于双丰林业局地区27号林班森林蓄积量而言,年均温度,年均最低温度以及年均降水对其增加有显著的影响。同时,冗余分析显示,就所有森林蓄积量和乔木生物量因子而言,年均降水是其最佳环境解释因子,解释率为69.4%;年均温度次之,解释率为26.3%。更多还原

【Abstract】 The Tianbao Project is an ecological protection project at the present stage of our country.It has made important contributions to the prosperity and sustainable development of China’s forestry,and is a major measure for the benefit of future generations.In today’s dramatic global climate change,in-depth study of the impact of natural forest protection projects on the volume of forest reserves,determine its changing rules and influencing factors are urgent issues to be solved.Taking the No.27Lin Ban in Shuangfeng Forestry Bureau as an example,based on the work data of Shuangfeng Forestry Bureau for 15 years,this paper takes five years as a time unit,in-depth understanding of the total amount of forest stocks,natural forest stocks,artificial forest stock volume and forest tree biomass factors,and major environmental factors affecting their changes after the implementation of the natural forest protection project in Shuangfeng Forestry Bureau.The main conclusions of this paper are as follows:(1)Since the implementation of the Tianbao Project,the forest resources of No.27 Linban in Shuangfeng Forestry Bureau have been significantly improved.In the past 15 years,a cumulative increase of 4483 m~3 of forest reserves was recorded.In addition,the natural forest reserves have been more significantly increased with a cumulative increase of 6092 m~3.This is mainly due to the fact that since the implementation of the Tianbao Project,Shuangfeng Forestry Bureau has been vigorously developing the protection of natural forest resources,increasing the proportion of natural forests in the region,and at the same time reducing the relative proportion of planted forests.(2)During the 15 years of the development of the natural forest protection project,the canopy density of the 27 forest trees in the Shuangfeng Forestry Bureau area,the net growth rate of the forest trees,the average tree height of the trees,and the average DBH of the trees have all been significantly improved.(3)For No.27 Linban forest reserves in the Shuangfeng Forestry Bureau,the average annual temperature,the average annual minimum temperature,and the average annual precipitation have a significant effect on the increase.At the same time,the redundancy analysis shows that the average annual precipitation is the best environmental interpretation factor for all forest volume and tree biomass factors,with the interpretation rate of 69.4%;the average annual temperature is the second,and the interpretation rate is 26.3%.更多还原