The results showed that the order of carbon fixation for different forest species of highwood was:timber forests﹥fuelwood forests﹥special use forests﹥protective forests;the order of carbon fixation for different developmental stages of highwood was:young forests﹥middle age forests﹥near mature forests﹥mature forests﹥over mature forests;the order of carbon f.

The reasons for irrational & ununified criteria for both charging and forest species differentiation in the course of charging for forest vegetation restoration cost, lead to the problems about artificial alterations of land classification and forest species before the expropriation & occupation of forestland.

Analyzing the forest farmers behavioral characteristic managing the different forest category behind the new round of collective forest property rights institution reform,we arrive at a conclusion that the objective expectancy and reformation result is not the same.

Investigation and analysis of forest category and tree species composition reveals that the main problem is economic forest area is too small,generating less economic benefits gained by farmers who have participated in the project,and that species selection was narrowed to single species which led to larger area of pure forest.

Based on the conception of Optimal cover rate of forest (OCRF), the view that forest category should be a basic unit for evaluating the amount of OCRF is put forward.

The five types in sample land are as follows: return economic forest for keeping soil type, return forest for keeping soil type, mixed block return forest type, return forest in the top of mountain type and return forest in forbidden cutting type.

The optimized model for the ecoecological shelterbelt system in Yanchi was established and the optimal pattern of forest type,tree species in the sandy area of Yanchi county was put forward.

Study and analysis on forest resources dynamics and development tendency in Zhejiang,investigation, evaluation and plan on current situation of forest type and tree species,especially on famous.

The present state of the rubber products used in auto industry is presented with the statistics made of rubber consumptions in various motor cars, the kinds of rubbers and the ratios used in automotive rubber products, the annual world car outputs, rubber consumptions, tire outputs as well as the sales amounts of the world top 30 rubber products enterprises.