摘要
【目的】研究3种林龄小叶锦鸡儿(Caragana microphylla Lam.)林根系生物量及碳储量分布特征,为沙地生态系统碳储量估算提供参考。【方法】以内蒙古敖汉旗风沙土区不同林龄(3,10,18年)的小叶锦鸡儿林为研究对象,分别设置3个样地,采用分层分段挖掘法,测定不同土层、土段的根系生物量、有机碳含量,计算根系碳储量,分析不同林龄小叶锦鸡儿根系生物量垂直分布特征及根系碳储量分布特征的变化。【结果】随着土层深度的增加,3年生和10年生小叶锦鸡儿根系生物量呈先增加后减少趋势,18年生小叶锦鸡儿根系生物量呈逐渐减少的趋势。3,10和18年生小叶锦鸡儿根系总生物量分别为138.6,1 031.84和1 120.33g/株,随着林龄的增加,小叶锦鸡儿根系生物量呈增长趋势。3,10和18年生小叶锦鸡儿根系碳储量为12.32,47.78和198.11g/m2,随着土层深度的增加,不同林龄小叶锦鸡儿根系碳储量总体均呈倒锥形分布,并随着林龄的增长呈增加趋势。【结论】小叶锦鸡儿作为风沙土区理想的造林树种,其根系具有一定的碳汇功能。
【Objective】This paper studied the distribution characteristics of root biomass and carbon stocks of Caragana microphylla Lam.forests at three ages in Aohan sandificational area to provide reference for estimating carbon stocks of sandy ecosystem.【Method】Forests of Caragana microphylla Lam.at three different ages（3,10,and 18years）in Inner Mongolia Aohan sandificational area were selected.Three sample plots were set in each forest.Layered and segmented dig method was used to determine root biomass,organic carbon contents in different soil layers and soil segments,and root system carbon stocks.Changes in distribution characteristics of root biomass and root system carbon stocks were also analyzed.【Result】With the increase of soil depth,root biomass decreased after initial increase in forests at ages of 3years and 10 years,while it decreased gradually in 18 years old forest.The total root biomasses of forests at ages of 3,10 and 18years were 138.6,1 031.84 and 1 120.33g/plant.With the increase of forest age,root biomass increased.The carbon stocks of forests at ages of 3,10 and 18years were 12.32,47.78 and 198.11g/m^2.With the increase of soil depth,the distribution of carbon stocks was in a shape of inverted cone and it increased as the age increased.【Conclusion】Caragana microphylla Lam.is an ideal afforestation speciesin sandificational area and its root system has great carbon fixation potential.
作者
王娟
郭月峰
姚云峰
汤军
张美丽
WANG Juan GUO Yuefeng YAO Yunfeng TANG Jun ZHANG Meili(Department of Ecology and Environmental Science, Inner Mongolia Agricultural University , Hohhot , Inner Mongolia 010018, China)
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2017年第2期103-110,共8页
Journal of Northwest A&F University(Natural Science Edition)
基金
内蒙古应用研究与开发计划项目"农林牧耦合生态系统固碳关键技术"(20110732)
中国科学院战略性先导科技专项(XDA05060602)
国家自然科学基金项目(31500584)
关键词
小叶锦鸡儿
根系
碳储量
Caragana microphylla Lam
root system
carbon stocks
