通辽市杨树人工林含碳率及碳密度分析

Carbon content and carbon density of Populus plantation in Tongliao City

利用NPP实测法对通辽市杨树人工林各层次、林木各器官的含碳率以及碳密度进行了研究。结果表明：林木各器官含碳率的变化范围在35．96％～52．39％之间，排序为叶〉皮〉枝〉干〉根；草本层含碳率的变化范围在34．93％-44．24％之间；枯落物层含碳率的变化范围在34．19％-39．44％之间；土壤各层有机碳含量（土壤含碳率）的变化范围在0．41—21．14g·kg^-1之间。杨树人工林碳密度为100．44t·hm^-2，其中林木为27．27t·hm^-2；草本层为0．13t·hm^-2；枯落物层为0．65t·hm^-2；土壤碳密度为72．38t·hm^-2，土壤有机碳含量和碳密度均呈现随着土层深度的增加而逐渐下降的变化规律。文中对于杨树人工林含碳率的研究为今后更精确的测算当地杨树人工林碳储量提供数据基础及理论依据，也将为今后通辽市林业发展及碳汇造林提供科学依据。

In this paper, the carbon content and carbon density of Populus plantation and its organs at all levels were calculated by the NPP method in Tongliao City. The results show that carbon content in different organs of Populus plantation ranges from 35.96% to 52.39%, and the range is ： leaves 〉 bark 〉 branches 〉 trunk 〉 roots. Carbon content in grass layer of Populus plantation ranges from 34.93% to 44.24%, carbon content in litter layer of Populus plantation ranges from 34.19% to 39.44%. The soil organic carbon content ranges from 0.41 to 21.14g · kg ^-1. The carbon storage of Populus plantation is 100.44 t · hm^-2. The carbon density of tree layer is 31.83 t · hm^-2, that of grass layer is 0.13 t · hm^-2, litter layer is 0.65 t · hm^-2 , soil layer is 72.38 t · hm^-2. Soil organic carbon content and carbon density are showing gradually decreases with the increase of soil depth. The research of Populus plantation carbon provides datal and theoretical basis more precisely to estimate local Populus plantation carbon in the future, and provides a scientific basis for afforestation of carbon sinks and the development of forestry in Tongliao City.