Abstract:

Taking four typical soil and water conservation forests in Taihang Mountain area of Hebei province as research objects.Comparative study on biomass,carbon content and carbon storage of various organs in arbor layer of mixed forest(Quercus variabilis-Platycladus orientalis),Pinus tabulaeformis,Quercus variabilis forest and Robinia pseudoacacia forest.The results showed that the biomass of mixed forest,Pinus tabulaeformis,Quercus variabilis forest and Robinia pseudoacacia forest were 51.94t/hm ²,86.40t/hm ²,90.19t/hm ² and 18.08t/hm ² respectively,and the biomass of Quercus variabilis and Pinus tabulaeformis forest was higher than 4 the average biomass of soil and water conservation forests(65.65t/hm ²),the biomass of mixed forest and Robinia pseudoacacia forest only accounted for 84.25% and 29.33% of the average biomass,respectively.The order of distribution of organs in different forest stands in tree layer biomass was as follows:trunk > root > branch > leaf.The carbon content of each of the four typical stands was 45.16%~58.93%,58.48%~64.61%,51.16%~58.37%,52.35%~62.30%.The carbon storage of four typical stands is 10.10~53.85t/hm ².The carbon storage of each organ of different forest types was positively proportional to the biomass,which was basically the same as the biomass trend.The carbon storage size was as follows:Pinus tabulaeformis > Quercus variabilis forest > Mixed forest > Robinia pseudoacacia.

Key words: soil and water conservation forest, biomass, carbon content, carbon storage