Study on Carbon Storage in Main Afforestation Tree Species of the Second Forest Zone around Guiyang City

The total carbon were evaluated by methods of potassium dichromate and sulphuric oxidation.The net carbon storage now and 10 years later and spatial distribution of carbon were studied in 11 artificial tree species on the second forest zone around Guiyang city.The results showed that the net carbon storage of 11 tree species were decreased with the order: 5 301.45 kg/hm2 in Lagerstrcemia indica,2 775.05 kg/hm2 in Phellodendron chinense Schneid.,2 707.47 kg/hm2 in Eucommia ulmoides,1 666.78 kg/hm2 in Cinamomum camphora,1 322.5 kg/hm2 in Elaeocarpus decipiens,1 120.49 kg/hm2 in Cinnamomum bodinieri Levl.,882.95 kg/hm2 in Ginkgo biloba L.,720.5 kg/hm2 in Choerospondias axillaris,713.46 kg/hm2 in Robinia pseudoacacia,591.49 kg/hm2 in Koelrenteria Paniculata,581.85 kg/hm2 in Ligustrum lucidum.The percent of net carbon storage of stem in each tree were higher than other organs,and which in branch,in leaf and in root were approximate.The net carbon storage of 11 tree species would amount to 602.85 t/hm2 10 years later,and the economic value will amount to 183 869.25 yuan/hm2.