Abstract: In order to study the effect of the forests in Hebei prov. on Ccycle and the indirect benefit of afforestation from CO₂ fixation, the correlation betweenthe wood volume increment and the live biomass including foliage, branches, roots and non-tree biomassin forests was developed. Based on this correlation and data of wood volume increment, the area of the man-made forests, and increment of forest area, the amount of CO₂ fixed by forest in Hebei Province was calculated. In addition, the transfer of C by forest logging, thinning and forest treatment and was analysed, and the loss of C from decomposition after forest logging was calculated. The total Cfixation of forests in Hebei Province amound to 13,545,185 ton of CO₂. Based on calculation of the investment of afforestation for Cstorage, the annual benefits of forest from Csink equatetd to 3.405 billion RMB $.

Key words: Apis cerana ceraca, A. mellifera ligustica, melissopalynology, nectar plant, trophic niche.