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应用生态学报 ›› 2022, Vol. 33 ›› Issue (4): 878-886.doi: 10.13287/j.1001-9332.202204.019

• 土壤物理与生态环境专栏 • 上一篇    下一篇

祁连山不同类型草地的土壤理化性质与植被特征

杨学亭1,2, 樊军1,3*, 盖佳敏1,2, 杜梦鸽3, 金沐3   

  1. 1中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100;
    2中国科学院大学, 北京 100049;
    3西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100
  • 收稿日期:2021-06-24 接受日期:2021-09-17 出版日期:2022-04-15 发布日期:2022-05-07
  • 通讯作者: * E-mail: fanjun@ms.iswc.ac.cn
  • 作者简介:杨学亭, 女, 1994年生, 博士研究生。主要从事生态水文研究。E-mail: yangxueting17@foxmail.com
  • 基金资助:
    第二次青藏高原综合科学考察研究项目(2019QZKK0306)资助

Soil physical and chemical properties and vegetation characteristics of different types of grassland in Qilian Mountains, China

YANG Xue-ting1,2, FAN Jun1,3*, GE Jia-min1,2, DU Meng-ge3, JIN Mu3   

  1. 1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China;
    3State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, Shaanxi, China
  • Received:2021-06-24 Accepted:2021-09-17 Online:2022-04-15 Published:2022-05-07

摘要: 祁连山草地生态系统在维护我国西部生态安全方面起着举足轻重的作用。为了解祁连山不同类型草地土壤水分、养分等理化性质与植被分布特征,及土壤理化性质与植被特征的相关关系,于祁连山选取7种类型的草地,测定土壤水分含量、养分含量、容重、颗粒组成和植被特征,计算土壤颗粒的分形维数、0~40 cm土层土壤有机碳、全氮和全磷储量、植物多样性指数。结果表明: 祁连山不同类型草地的土壤理化性质与植被特征差异显著,高寒草甸相比于其他类型草地具有较高的土壤水分、养分和黏粒含量,及较低的容重和砂粒含量;0~40 cm土层土壤有机碳、全氮、全磷储量变化范围分别为3084~45247、164~2358、100~319 g·m-2,整体表现为有机碳和全氮含量高、全磷含量低;土壤全磷储量与植物多样性指数呈显著正相关关系,表明土壤全磷含量是祁连山草地植物多样性的关键影响因素。相比其他草地类型,高寒草甸具有较好的植被状况和土壤水分、养分条件。

关键词: 祁连山, 高寒区, 草地, 植物多样性, 土壤物理性质, 土壤养分

Abstract: Grasslands in Qilian Mountains plays an important role in maintaining the ecological security of western China. To understand soil physical and chemical properties and the distribution characteristics of vegetation, as well as their correlation in different types of grasslands in Qilian Mountains, we measured soil moisture, nutrient content, bulk density, particle composition, and vegetation characteristics in seven types of grassland in Qilian Mountains. The fractal dimension of soil particles, soil organic carbon, total nitrogen and total phosphorus storages in 0-40 cm soil layer, and plant diversity index were calculated. The results showed that there were significant differences in soil physical and chemical properties and vegetation characteristics among different grassland types. Compared with other types of grassland, alpine meadow had higher soil water, nutrient and clay content, but lower bulk density and sand content. Soil organic carbon, total nitrogen and total phosphorus storages in 0-40 cm layer ranged from 3084 to 45247, 164 to 2358 and 100 to 319 g·m-2, respectively, with high contents of organic carbon and total nitrogen and low content of total phosphorus. There was a significant positive correlation between soil total phosphorus storage and plant diversity index, indicating that soil total phosphorus content was the key factor affec-ting grassland plant diversity in Qilian Mountains. Compared with other grassland types, alpine meadow in Qilian Mountains had better vegetation status, soil moisture, and nutrient conditions.

Key words: Qilian Mountains, alpine region, grassland, plant diversity, soil physical property, soil nutrient