地理科学 ›› 2012, Vol. 32 ›› Issue (4): 492-498.doi: 10.13249/j.cnki.sgs.2012.04.492
收稿日期:
2011-03-12
修回日期:
2011-09-05
出版日期:
2012-04-20
发布日期:
2012-04-20
作者简介:
作者简介: 孙丽萍(1984-),女,甘肃庆阳人,研究实习员,从事土壤侵蚀与地貌反演研究。E-mail:
基金资助:
Li-ping SUN1,2(), Xiao-dan WANG1(
)
Received:
2011-03-12
Revised:
2011-09-05
Online:
2012-04-20
Published:
2012-04-20
摘要:
基于侵蚀过程会导致树木生长环境变化,进而改变根系生长生理特征的基本研究思想,以金沙江干热河谷龙川江流域为典型区,从树根细胞解剖结构和组合特征的变异中提取土壤侵蚀信息,探索和发展了基于树木生理生态的土壤侵蚀研究新方法与技术。结果表明,不同侵蚀强度下根系的年轮分布特征不一致,其中偏心率大小顺序为:局部暴露根系>浅埋根系>完全暴露根系,且偏心率与根系以上土层厚度、暴露程度存在显著性相关;根系导管面积是反演侵蚀过程的敏感指标,早材导管面积的变异是确定根系暴露时间的重要依据之一;龙川江流域土壤流失厚度为1.47~4.47 mm/a,平均侵蚀模数约为3 692 t/(km2·a)。
中图分类号:
孙丽萍, 王小丹. 基于根系解剖结构的金沙江干热河谷土壤侵蚀速率估算[J]. 地理科学, 2012, 32(4): 492-498.
Li-ping SUN, Xiao-dan WANG. Evaluation of Soil Erosion Rate Based on Anatomical Structure of Treeroots — A Case Study in the Dry-hot Valley of Jinsha River[J]. SCIENTIA GEOGRAPHICA SINICA, 2012, 32(4): 492-498.
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