秭归县退耕还林固碳释氧效益分析

Analysis on Carbon Fixation and Oxygen Release Benefit of Returning Farmland to Forest in Zigui County

本文对秭归县退耕还林工程主要造林树种及其造林面积进行了统计分析,并对全县退耕还林工程固碳释氧效益进行了测算,结果表明:秭归县退耕还林中经济林面积最大,其次是阔叶林,针叶林面积最小。工程造林面积超过1 000hm2的树种是依次是核桃、刺槐、柑桔、板栗、紫穗槐和茶叶。秭归县退耕还林工程年固碳量为64 780.7 t,年释氧量为110 468.7 t,为全县生态环境和固碳减排发挥了巨大作用。

The main planting tree species and area of returning farmland to forest were analyzed in Zigui County,and the carbon fixation and oxygen release benefit was counted.The results showed the area of non-timber product forest was maximum,and that of broadleaf forest was secondly,and that of coniferous forest was minimum.The tree species which area was more than1 000 hm2 were in the following order：Juglans regia,Robinia pseudoacacia,Citrus reticulate,Castanea mollissima,Amorpha fruticosa,Camellia sinensis.The carbon fixation amount and the oxygen release amount of returning farmland to forest in Zigui County were 64 780.1 t·a-1 and110 468.7 t·a-1,respectively.The project of returning farmland to forest plays an important role for ecological environment and fixing carbon and reducing discharge of the whole county.