文献类型：期刊文献

中文题名：不同优势度马尾松的生物量及根系分布特征

英文题名：Characteristics of biomass and root distribution of Pinus massoniana with different dominance

作者：张治军[1] 王彦辉[1] 于澎涛[1] 袁玉欣[2] 李志勇[1] 张国增[3] 刘英亘[4]

第一作者：张治军

机构：[1]中国林业科学研究院森林生态环境与保护研究所;[2]河北农业大学林学院;[3]石家庄市园林局公园处;[4]天津市津南区林业工作站

年份：2008

卷号：32

期号：4

起止页码：71-75

中文期刊名：南京林业大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：天然林保护工程科技支撑项目课题(TBKJ2003-04);国家科技支撑计划课题(2006BAD03A1803);国家林业局森林生态环境重点实验室资助项目

语种：中文

中文关键词：酸雨区;马尾松;生物量结构;根系分布

外文关键词：Acid rain region ; Pinus massoniana ; Biomass structure ; Root distribution

分类号：S791.248;S718

摘要：对重庆酸雨区不同优势等级马尾松单木的生物量及根系分布特征进行了系统调查。结果表明:马尾松个体生物量中地上部分占90%以上,根系不足10%,各器官生物量所占比例顺序从大到小依次为:干、枝、根、皮、叶。不同优势等级马尾松林木的根系分布深度与幅度有很大区别,优势木垂直根系深度可达130 cm,水平根系集中在半径为3 m的范围内;而非优势木垂直根系一般不超过80 cm,水平根系集中在1.5 m为半径的范围内。不同径级根系在根系生物量中所占比例顺序从大到小依次为:粗根、大根、中根、小根、细根,其中粗根和大根占总根量的90%以上,中、小、细根不足10%。通过根钻法调查酸化土壤中生长的马尾松林木细根的分布特征,发现在40 cm深度范围内有大量马尾松细根存在,并在表层土壤较为集中;细根量随距样木距离的加大而不断减少,一般在距样木2.0 m的位置减至最低。
The structure characteristics of biomass and spatial distribution of root system of Pinus massoniana with different dominance were systematically investigated in the acid rain region of Chongqing, China. The results showed that the aboveground biomass accounts for more than 90% of the total biomass and the ratio of roots was less then 10%. The order of biomass ratio of different organs was trunk,branch,root,bark, needle. The depth and width of root distribution varied obviously with the dominance of individual trees. For dominant trees, the vertical root could reach a depth of 130 cm, and the horizontal range of root system with a radius of 3 m. On the other hand, it is less then 80 cm in depth and 1.5 m in radius for the non-dominant trees. The biomass proportion of roots within different diameter range was ordered as stump,large root, middle root, small root, fine root. The biomass sum of stump and large root accounts for more than 90% of the total amount of root system, while the proportion of all other root diameter classes accounts for only less than 10%. The study of fine root distribution of Pinus massoniana using soil coring method showed that the fine root was plentiful in the soil layer of 0-40 cm. It was especially concentrated in the upper soil layer （0-10 cm）. Fine root biomass decreased with distance from trunk of sampled trees increased. It reached a minimum at the position of 2.0 m away from the trunk.