黑龙江省典型森林类型主要树种及林地土壤含碳率测定研究

每种林分类型主要树种的含碳率是研究该林分类型碳汇量的关键因子。利用从黑龙江省6个地市不同林分类型采集到的18个树种各器官（干、枝、叶、根）以及各林分类型的林下植被、枯枝落叶及土壤各层的样品，采用重铬酸钾-硫酸氧化湿烧法进行含碳率测定分析，结果表明：18个树种不同器官含碳率的变化范围为40．52％～53．23％，平均含碳率为46．82％；各林分类型枯枝落叶含碳率较高，达到35．76％～52．57％，土壤A层含碳较低，B层较A层更低。

Determination of Carbon Content Rate in the Main Tree Species and Woodland Soil of Typical Forest Types in Heilongjiang Province

Carbon content rate （CCR） of the main tree species of every stand types is the key factor to study CCR of the forest types .Eighteen species of various organs （stem ,branch ,leaves ,roots） ,understory vegetation of various forest types ,the sample of the litter ＆ soil layers were collected from different forest types in six cities in Hei-longjiang Province ;CCR were determined by using wet oxidation with potassium dichromate/sulfuric acid .Result shows that ：CCR of different organs for 18 species varied from 40 .52% to 53 .23% ,the average CCR being 46 .82% ;CCR of litter for each forest type are more higher ,being 35 .76%-52 .57% ;the carbon content of A layer of soil is lower ,and B layer of soil is more lower than that of A layer .