喀斯特石漠化过程中地表凋落物δ15N特征

Translated title of the contribution: Characteristics of nitrogen isotope in surficial litters under karst rocky desertification

Xu Qiang Luo, Shi Jie Wang, Gui Ling Zhang, Xiu Ming Liu, Hong Yan Yang, Xin Gou

    Research output: Contribution to journalArticle

    Abstract

    This study investigated isotopie composition and spatial distribution of nitrogen of surficial litters in karst rocky desertification areas with different type, grade and disturbed model within a small catchment of the Wangji-azhai peak-cluster depression basin, Qingzhen, Guizhou. Results showed that the most δ15 N values of surficial litters in yellow soil areas are between -4. 00‰ to -1. 83‰ with an average of -3. 13‰, and that between-4. 49‰∼ -2. 44%o with an average of -3. 39‰ in black calcareous areas. The hydrothermal condition of the environment is the key factor controls litters' δ15 N values. The δ15 N values of surficial litters show no significant difference for all sampling sites except those from slight or no rocky desertification sites in black calcareous areas. We suggest not significant (P ≤ 0.05) overall difference of surficial litters' δ15 N values in yellow soil and black calcareous areas as a result of the high habitat heterogeneity of the karst area.

    Original languageChinese
    Pages (from-to)214-220
    Number of pages7
    JournalBulletin of Mineralogy Petrology and Geochemistry
    Volume33
    Issue number2
    DOIs
    Publication statusPublished - 10 Mar 2014

    Keywords

    • composition of nitrogen isotope
    • karst rocky desertification
    • spatial distribution characteristics
    • surficial litter

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