In order to clarify the impact of different forest management modes on natural forest carbon storage,promote forests ' protection,development and sustained utilization of business district,the author used indirectly harvesting method to obtain the sample,and the content of carbon in plants was determined with the method of potassium dichromate colorimetric,the natural forest carbon storage was carried on the comparative analysis under 9 kinds of management modes.The result showed that:the combination of cutting patterns were more conducive to improve the forest tree trunks,branches and roots of carbon storage,but the carbon storage of leaves had little difference under a variety of operating modes.The distributions of the carbon storage for the natural forest stands was generally subjected to the tree layer>litter layer>herb layer>shrub layer,natural forest carbon storage was ready for the greatest in the combination of cutting patterns,and the conservation replanting mode was in the minimum,orientation training mode and thinning adjustment mode was in the medium.Forest carbon storage mainly concentrated in the tree layer,stands for each layer of the management mode were different,judging from the total amount of carbon storage,natural forest management mode selected combination of cutting patterns was more reasonable,more conducive to increase carbon storage of forest resource,promote to form the natural mixed forest which both were of high ecological and economic,push forward material cycle of forest ecosystem,promote the health of the ecological system and sustainable development.

The community structure and water holding capacity of litter and soil of Eucalyptus urophylta ×E.eamalducensis plantations under different management densities in Yong'an City were studied.The results showed that the management density obviously affected the plantation structure,which had significant correlations to DHB and tree height,with correlation coefficient of-0.99 and-0.93,respectively,and that to stand volume with r=0.84.The effects of densities on species diversities from shrub layer to herb layer were different,which had significant correlation to shrub layer with r=0.94,and poor correlation to herb layer with r=-0.52.The species composition of undergrowth layer were great different under 5 different densities,and the vegetation yield under low density was the biggest.The litter maximum water holding capacity had significant correlation to stand densities with r=0.94.

High conservation value forest is an important foundation for forest certification and sustainable management.Based on the concept and objective of high conservation value forest,regarding the application of high conservation value forest as the breakthrough point,this paper describes high conservation value forest's potential application value from the aspects of sustainable forest management,forest certification,timber exchange and forestry investment,vegetation restoration in fragile ecology areas,landscape planning in nature reserve,fire districtand community forestry etc.And this research will play an positive role in the further study on HCVFs.

Proceed from the anaylsis of risk and risk management in this paper,The risk theory were adduced to study on the capitalization management of forest resource,The definition of forest resource property management risk were presented for the first time.Base on the analysis of main risk types,some strategy of risk prevent and risk such as insurance、relief of disasters、system establishment of risk fund and lowest timber price protection credit subsidies,strengthen of information service and basic research,and deepening system reform etc.were put forward to promote forest resource capitalization management of china.

The probability distribution model of annually extremely lowest climate temperature of Yong'an City was set up by applying the first model extreme distribution in the extreme theory and using the basic data of meteorological observation of Yong'an City from 1971 to 2005.The result shows that the distribution of the annually extremely lowest climate temperature is submitted to type I of Fisher-Tippett's distribution of limited values,and the estimates for annually probably lowest climate temperature in T years(T=5,6,7,8,9,or 10) are computed by applying extreme distribution.Therefore,this paper provided an important basis in the introduction and cultivation of eucalypts.

Eucalyptus is one of the most important tree species for plantation in south China its plantation has been greatly developed for its extensive adaptability.Now it has become one of the most successfully introduced tree species in the forestry history of China,it is also the main afforestation tree species in Yong' an Forestry Co..Taking eucalypt plantations in the management area in Yong'an Forestry Co.Ltd as an example,the system of technology and measure to sustainable management of eucalypt plantations were built on the deep risk analysis of eucalypt introduction in the paper,which provided a powerful guarantee for the sustainable management of eucalypt plantations in Yong' an Forestry Co.,and also provided a reference to the sustainable development of eucalypt plantations in China.

This paper established the criteria and indicators system of sustainable forest management in order to actualize sustainable forest management of Yonglin corporation.The criteria system was dead against the resource situation and management practice of the company and composed of 6 criteria and 43 indicators.The reference of sustainable forest management of the southward collective forest corporation was also put forward.

针对永安林业(集团)股份有限公司"十一·五"规划与企业发展需要,提出封禁保护、保育补植、疏伐培育、改良增效、块(带)状利用、高产高效等六种森林资源可持续经营措施模式,并对各模式的适用对象、培育目标及措施进行分析,以期为新时期南方集体林区森林资源可持续经营提供参考.

The natural forest is the main part of forest resources,and play very important role in forest resources,forest products and ecological safety.Taking Fujian Yong'an Forestry(Group) Joint-stock Co.Ltd.as a case,the construction strategies and ideal patterns of modern forestry enterprise were put forward based on the analyses of the ecologic advantages of the natural forests in the forest sustainable management and the problems in natural forest management today in this paper.This will provide fundamentals in the construction and development of modern forestry enterprises in China.

As the main part of forest resources,natural forest plays a very important role in forest resources construction,ecological environment conservation and forest products,which is essential to sustainable development of society and economy.Compared with artificial plant,natural forest has obvious ecological advantages in aspects of improving the community structure,resisting diseases and pests,enhancing stand productivity,encouraging nutrient cycle,maintaining soil fertility and protecting biodiversity.Therefore,the conservation and sustainable management of natural forests is not only the keystone of sustainable development in forest,but also is crucial to national security.However,problems remain to be well solved such as the scale of conversation,the standard and technical specification of sustainable management,the compensation mechanism of ecological benefit,and so on.Based on conservation and existing problems of natural forest,the relationship between natural forest conservation and sustainable forest management was analyzed in detail in this paper,in which some key points of sustainable management in natural forest were put forward to provide theoretical basis for the conservation and sustainable management of natural forest in China.

本文论述应用层次分析法对林区公路路线方案进行优化决策,从中确定最佳路线方案.以克服传统上使用定性分析法的一些不足,使结果更加科学合理.

开发高效利用"三剩物"科研项目，并使之产业化，是目前我国开拓木材工业生产新局面的当务之急和有力举措·"纸浆模塑环保型系列餐具及包装材料"项目既有高效益，又有巨大市场需求和广阔应用前景，是高效利用"三剩物"的极佳选择·