Abstract: A field experiment was conducted to determine effects of 6 treatments including no fertilization （CK）， conventional fertilization （CM）， corn straw plus chicken manure （SM）， peat plus chicken manure（PM）， mushroom residue plus chicken manure （MM） and high level of chicken manure （HM） on different soil active organic carbon and carbon pool management index（CPMI）. The results showed that soil total organic carbon （TOC）， easily oxidized organic carbon （LOC）， microbial biomass carbon （MBC）， water soluble organic carbon （DOC） were significantly influenced by the amount and type of organic fertilizers. Both improved carbon input and combined application of different organic fertilizers greatly increased different forms of organic carbon content， and thereafter improved soil CPMI. The MM treatment has the most significant increase effect on the contents of SOC， LOC， MBC， DOC. The MM treatment increased these forms of carbon contents by 36%-182% compared with CK treatment and carbon pool management index by 28% compared with SM， PM， and HM treatments. Significant relationships were found among soil LOC， MBC， DOC， CPMI and TOC. Therefore， the results demonstrated that the selection of organic fertilizers and its combined application would make the soil carbon pool in a benign state and achieve better fertilizing effect in organic agricultural production.

Key words: organic fertilizer, organic carbon, carbon pool management index, greenhouse vegetable land