以福建省闽北天然阔叶林为研究对象,应用福建省闽北地区的128株生物量样木数据为样木数据,采用联合估计法解决生物量各分量模型不兼容问题并利用免疫进化算法求解模型参数,建立了闽北天然阔叶林的立木生物量估测模型.研究结果对闽北地区森林资源经营管理以及碳储量测算有着重要的理论意义和实际应用价值.

The data from the natural broad-leaved forests in the North Fujian were used to put forward the new method to establish the timber assortment model,Using the joint estimation method with immune evolutionary algorithm based on auxiliary factors of the diameter and height,the stand of volume ratio medal was constructed.Through test,the volume ratio medal can be fitted the actual situation,which could be popularized and applied in forest resource investigation.

Based on the analysis of ttechnology line and expression for market approach of the forest resource assets evaluation,the application of the grey correlation analysis method to determine the weight of parameters and weighted average method were established to determine the method and formula of the final value.Given a practical application case which was the bamboo forest,the result would be helpful to enrich and perfect forest resource asset techniques,and applied value was worth popularization in the assessment practice.

Taking non-timber produce plantations as examples,based on the analysis of the technical thinking of forest resource assets evaluation with market approach was analyzed.It was proposed that the weight of reference case and finally the asset prices of the non-timber plantation assessed should be determined by grey correlation analysis.This study aimed to provide the price assessment of non-timber produce plantations with a new way to apply the market comparison approach.

The volume ratio model of wood assortment was built by choosing the proper equation,and the two dimension merchantable wood assortment volume yielding rate tables were compiled based on structure analyses of diameter grade wood assortments,with on the spot sample timber data collected from the natural broad-leaved forests in the north Fujian Province.The wood assortment volume yielding rate tables were tested to be with high precision and practicable in forestry production.In order to facilitate the production and application,tree height model was established,and the one dimension merchantable wood assortment volume yielding rate tables were derived from the two dimension tables.

Fuding Municipality in east part of Fujian Province is the northernmost part for natural distribution of mangrove forest in China,which plays an important role in mangrove study.The biomass and its distribution law of Kandelia candel forests in Fuding,costal area of Fujian Province with different origins were studied by applying standard plant method and harvesting method.The results showed that the total biomass of the natural K.candel forests was 58.305 t/hm2 with the aboveground biomass for 32.919 t/hm2 and the underground part for 25.386 t/hm2.Whereas the total biomass of K.candel plantation in the same area was 25.359 t/hm2,among which the aboveground part was 14.711 t/hm2 and the underground part was 10.648 t/hm2 respectively.The study on the biomass distribution showed that the order by the biomass allocation for K.candel population was: twigs stems staple roots leaves mid roots stump fiber roots flowers.The characteristics of biomass of K.candel forest or plantation and the organ distribution explained its adaptability to high latitude habitat.

The nylon bag method was adopted to make a one-year observation of the decomposition of four natural forests litter in Wuyishan Scenery District.The results showed that the weightlessness ratio of four natural forests could be ranked in a decreasing order,that is,broadleaf leaf litter(63.1%) Phyllostachys heterocycla cv.Pubescens leaf litter(60.2%) Chinese fir leaf litter(51.6%) broadleaf twig litter(45.6%) Chinese fir twig litter(39.3%) Phyllostachys pubescens twig litter(39.2%) Pinus massoniana leaf litter(36.7%) Pinus massoniana twig litter(25.3%).The order of decomposition concentration(K values) of the four forest types was broadleaf leaf litter(0.996 a-1) Phyllostachys pubescens leaf litter(0.921 a-1) Chinese fir leaf litter(0.725 a-1) broadleaf twig litter(0.608 a-1) Phyllostachys pubescens twig litter(0.499 a-1) Chinese fir twig litter(0.497 a-1) Pinus massoniana leaf litter(0.457 a-1) Pinus massoniana twig litter(0.305 a-1).The organic C concentration of 8 kinds of litters decreased gently and gradually in general,and the loss proportion of the organic C of broadleaved forest and Phyllostachys heterocycla forest was higher than that of Pinus massoniana and Cunninghamia lanceolata forest.The content of P was in a fluctuating state of enrichment,and the P returning amount of Phyllostachys heterocycla was lower than that of other natural forests.The changing tendency of N concentration differed greatly,and the leaf decomposing rate of the broadleaved forests was the highest,most of whose composition was enriched in the later period.Except the branches of broadleaved trees,K concentration of all other litters decreased monotonously with the passage of decomposing time,which falls into leaching-release mode.The study aimed to discover the ecosystem function,nutrient decomposition rule,soil fertility condition of the four kinds of sub-tropical natural forest,providing scientific basis for protection and management of natural forests in Wuyishan Scenery District.

Species diversity of natural Cryptomeria fortunei community at different altitude levels in Tianbaoyan national Nature Reserve was studied by means of field investigation,and was calculated and analyzed through the measure methods of species diversity.The results showed that the tree layer diversity of Cryptomeria fortunei community presented a hump-shaped pattern along the elevational gradient with a peak at high-elevations;What's more,the shrub layer diversity presented a mid-altitude bulge with a peak at high-elevations.The species diversity of Cryptomeria fortunei communities were not affected by altitude,which indicated the consistency of species diversity in Tianbaoyan national Nature Reserve.It was concluded that the abundant species at high-elevation(1200～1600 m) resulted from better thermal and humid conditions,while the conspicuous decline of species richness at mid-elevation(1000～1200 m) and low-elevation(900～1000 m) was a result of human disturbance.

Two phases of remote sensing image data taken respectively in 1992 and 2000 were interpreted through ERDAS software and the change in landscape pattern of Longkou Municipality was analyzed with two categories of indices from the landscape pattern and landscape levels by means of using FRAGSTATS software.The results showed that the orchard land area,farming land area without irrigation facilities and the construction land area significantly increased,while the irrigated land area and forested land area decreased.The reasons for the change in landscape pattern were also analyzed in the paper.

Based on the investigation of the Cryptromeria fortunei populations in the Tianbaoyan National Nature Reserve of Yong'an City,the concerntration class index,Iwao M*-x-and Taylor principle were used to research spatial distribution pattern of the Cryptromeria fortunei populations at different altitude levels.The result showed that at the altitude from 1 000 m to 1 200 m and from 1 200 m to 1 600 m,the Cryptromeria fortunei populations performed the pattern of clustering distribution,and at the altitude from 900 m to 1 000 m it showed uniform distribution.Analysis of the distribution pattern of the Cryptromeria fortunei at different sampling sizes at different altitude levels,the aggregating intensity at the quadrat of 25 m2 was the highest.