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由大气CO2浓度不断增加引起的温室效应而导致全球气候变化对人类社会的可持续发展构成了巨大挑战,大气碳的减排增汇已经成为人类社会的共识。随着我国碳汇交易市场的发展和逐步健全,退耕还林碳汇效益的经济价值将会日益凸显。通过2000～2006年黔中清镇市红枫湖流域内退耕还林工程实施情况的调查,对林区内主要树种杉木、柳杉、桃树、李树、杏树、喜树、楸树7种林木的碳净贮量进行初步估算。随着时间的变化,森林的中、幼龄林碳贮量和碳密度都有上升的趋势,中、幼龄林将发挥越来越大的固碳潜力。通过对森林各树种蓄积量的预测,在所研究的7种树种中,杉木是研究区内碳汇功能强的树种,其次为柳杉,经果林的碳汇功能最弱,到2006年,其碳汇可达1.05×104kg,并根据模型估算,未来10年红枫湖流域的森林碳贮总量约为2.21×104kg,按每吨305元的价格计算,可产生7.17×106元的经济效益,固碳的经济效益十分可观。
Due to the greenhouse effect caused by the increasing atmospheric CO2 concentration, the global climate change poses a great challenge to the sustainable development of human society. It has become the consensus of human society to increase sinks of atmospheric carbon emissions. With the development and improvement of China’s carbon trading market, the economic value of the benefits of returning farmland to forests will become increasingly prominent. Through the investigation of the implementation of the project of returning farmland to forest in the Hongfeng Lake valley in Qingzhong City, Guizhou Province from 2000 to 2006, the main tree species of Chinese fir, cedar, peach, plum, apricot, Estimated net carbon stock of forest species. With the change of time, the carbon stocks and carbon densities of middle and young aged forest in the forest all have an increasing trend, and young and middle-aged forests will exert more and more carbon sequestration potential. Through the prediction of the stock volume of each forest species, among the seven species studied, Chinese fir was the most powerful species of carbon sink in the studied area, followed by Cryptomeria fortunei, and the carbon sink function of the fruit forest was the weakest. By 2006, Carbon sink up to 1.05 × 104kg, and estimated based on the model, the forest carbon stocks in Hongfeng Lake Basin in the next 10 years is about 2.21 × 104kg, at a price of 305 yuan per tonne, which can produce economic benefits of 7.17 × 106 yuan , The economic benefits of carbon sequestration is very impressive.