毛竹等11种浙江省碳汇造林树种含碳率分析

Carbon Content Rate of 11 Reforestation Tree Species for Carbon Sink in Zhejiang

采用重铬酸钾硫酸氧化加热法对毛竹等11种浙江省碳汇造林树种不同器官的含碳率进行了测定，并用聚类分析法分析，得到以下结论：浙江省主要树种含碳率可以分为四种类型：第一类是毛竹，根部含碳率高，叶部含碳率低；第二类为松类、檫木和杉木，含碳率高；第三类为硬阔中的木荷、青冈和软阔中的桤木．生长速度较快；第四类为软阔中的枫香和硬阔中的山杜英。各树种各部分含碳率均在45．21％～53．88％之间，毛竹、针叶树种各组分的含碳率总体上比阔叶树种高1％～3％，毛竹林、针叶林的含碳率远远高于阔叶林。各器官含碳率可以分为3类：其中干部归为一类，根部和枝归为一类，叶部独立为一类。

The carbon content rate in each organ of 11 main reforestation tree species in Zhejiang province was studied by the method of potassium dichromate oxidation. The carbon content rate of the 11 main tree species in Zhejiang province can be classified into four groups. The first one is Moso bamboo with high carbon content rate in roots and low in leaves. Pines, Chinese sassafras and belong to the second one. The third group Chinese fir, with high carbon content rate, is Schmia superba, glauca and alnus with a fast growth rate; The fourth one is maple and arama. Carbon content rate of different trees in each part ranges from 45. 21% to 53. 88%. Carbon content rates of Moso bamboo and pines are generally 1 -3% higher than softwood trees, therefore, carbon content rate of Moso bamboo forest and pine forest are much higher than that of softwood forests. The carbon content rate in different organs can be divided into three types, including parts of trunks, roots and branches, and leaves.