吉林省林地林木资源核算研究

【目的】对吉林省林地林木资源实物量和价值量进行核算,摸清吉林省森林资源家底,反映吉林省林地林木资源静态状况、动态状况及其经济贡献,为吉林省科学提高森林经营管理水平,合理制定林业发展规划提供依据,也为我国开展森林资源核算研究提供实践参考。【方法】以吉林省第8次、第9次全国森林资源清查数据为实物量数据源,计算吉林省林地面积、林木蓄积存量及两次全国森林资源清查期间的变动量;结合2018年调查获得的相关成本价格数据,采用年金资本化法、重置成本法、收益净现值法、市场倒算法计算吉林省林地林木资源价值存量;采用不同核算账户分别对吉林省林地林木实物存量及其变动量以及价值存量进行列示。【结果】(1)两次全国森林资源清查期间,吉林省林地面积由856.19×10^(4) hm^(2)增加至904.79×10^(4) hm^(2),林木蓄积量由96 534.93×10^(4) m^(3)增加至105 368.45×10^(4) m^(3),分别增加了5.68%、9.15%,增幅明显。第9次全国森林资源清查期间,吉林省天然林总面积和蓄积量达616.64×10^(4) hm^(2)、89 582.59×10^(4) m^(3),同第8次全国森林资源清查期末相比,分别增加了3.90×10^(4) hm^(2)和7 673.03×10^(4) m^(3),增加了0.64%和9.37%;人工林总面积和蓄积量达177.84×10^(4) hm^(2)、11 757.47×10^(4) m^(3),同第8次全国森林资源清查期末相比,分别增加了14.11×10^(4) hm^(2)和1 309.60×10^(4) m^(3),增加了8.62%和12.53%。(2)第9次全国森林资源清查期间,吉林省林地资源资产价值为1 903.28×10^(8)元,林木资源资产价值为1 037.64×10^(8)元,共计2 940.92×10^(8)元。【结论】两次全国森林资源清查期间,吉林省林地林木资源总量不断增加,森林资源资产不断积累,不仅为当地居民带来了巨大的生态福祉,也为“绿水青山”转化为“金山银山”奠定了一定的物质基础。

加强林地林木资源管理工作

随着我国经济建设的不断推进,可持续发展观念的不断深入,对于各种自然资源,如何能做到高效合理的利用,是当前发展的重要议题。如何能做到可持续的发展和利用,怎样高效的利用与管理林地林木资源,是与建立环境友好型社会的发展前提。本文将对已取得的成就进行总结,并通过对现状进行剖析,探讨如何加强林地林木资源管理工作,希望能为今后的林地林木资源管理工作带来一些启发。

Excel在林地林木资源价值核算调查抽样中的应用

今年4月份林业系统在全国范围内组织开展了林地林木价值核算调查工作,调查内容为乡(镇)、国有林场林地经营情况、林木生产经营相关情况。调查样本县、乡(镇)、国有林场采用二阶段不等概抽样方法,程序繁琐,尤其是抽取样本单元多的省份,要做到抽取样本具有典型性、代表性,确保调查质量不是简单的事情,本文解决了如何利用电子表格快速抽取多方案调查样本,通过比选确定最佳调查样本方案。

鹿道经营所林地与林木资源状况分析

从2个方面对牡丹江地区鹿道经营所林地资源状况和林木资源状况进行了分析。

我国人均森林财富达1.79万元

3月12日,记者从国家林业和草原局获悉,由国家林业和草原局联合国家统计局组织开展的“中国森林资源核算”研究成果显示,林地林木资源积累了丰富的森林资产,全国林地林木资产总价值为25.05万亿元。

数读天下

25.05万亿元国家林草局公布的第三期中国森林资源核算研究成果表明,我国林地林木资源持续增长,森林财富不断增加,全国林地林木资源总价值为25.05万亿元。

Carbon Sequestration in Forest Vegetation of Beijing at Sublot Level

Based on forest inventory data (FID) at sublot level,we estimated the carbon sequestration in forest vegetation of Beijing,China in 2009.In this study,the carbon sequestration in forest vegetation at sublot level was calculated based on net biomass production (ΔB) which was estimated with biomass of each sublot and function relationships between ΔB and biomass.The biomass of forested land was calculated with biomass expansion factors (BEFs) method,while those of shrub land and other forest land types were estimated with biomass,coverage and height of referred shrubs and shrub coverage and height of each sublot.As one of special forested land types,the biomass of economic tree land was calculated with biomass per tree and tree number.The variation of carbon sequestration in forest vegetation with altitude,species and stand age was also investigated in this study.The results indicate that the carbon sequestration in forest vegetation in Beijing is 4.12 × 106 tC/yr,with the average rate of 3.94 tC/(ha·yr).About 56.91% of the total carbon sequestration in forest vegetation is supported by the forest in the plain with an altitude of < 60 m and the low mountainous areas with an altitude from 400 m to 800 m.The carbon sequestration rate in forest vegetation is the highest in the plain area with an altitude of < 60 m and decreased significantly in the transitional area from the low plain to the low mountainous area with an altitude ranging from 200 m to 400 m due to intensive human disturbance.The carbon sequestration of Populus spp.forest and Quercus spp.forest are relatively higher than those of other plant species,accounting for 25.33% of the total.The carbon sequestration in vegetation by the forest of < 40 years amounts to 45.38% of the total.The carbon sequestration rate in forest vegetation peaks at the stand age of 30–40 years.Therefore,it would be crucial for enhancing the capability of carbon sequestration in forest vegetation to protect the forest in Beijing,to limit human disturbance in the transitional area from the plain to the low mountain area,and to foster the newly established open forest.