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  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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生物与土壤

干旱荒漠区退耕地植被演替及土壤水分变化

  • 马俊梅 ,
  • 满多清 ,
  • 李得禄 ,
  • 刘有军 ,
  • 郭春秀
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  • 甘肃省治沙研究所 甘肃省荒漠化与风沙灾害防治国家重点实验室, 甘肃 兰州 730000
马俊梅(1968-),女,甘肃民勤人,高级工程师,主要从事植被修复及荒漠化防治。E-mail:gsmqyz@tom.com

收稿日期: 2017-03-21

  修回日期: 2017-05-03

  网络出版日期: 2018-11-06

基金资助

国家自然科学基金项目(31460219,31560128);甘肃省国际科技合作专项(144WCGA171)

Characteristics of Vegetation Succession and Soil Moisture in Abandoned Cropland of Arid Desert Region

  • Ma Junmei ,
  • Man Duoqing ,
  • Li Delu ,
  • Liu Youjun ,
  • Guo Chunxiu
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  • State Key Laboratory of Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institute, Lanzhou 730000, China

Received date: 2017-03-21

  Revised date: 2017-05-03

  Online published: 2018-11-06

摘要

采用时空互代法,以不同退耕年限退耕地为研究对象,对27个样方植被群落特征和土壤含水量变化特征进行描述性统计分析,使用多元线性回归探究植物演替和土壤水分之间的关系。结果表明:(1)退耕18a间,退耕地植被群落自然演替经历了一年生草本为绝对优势种一年生和多年生草本竞争存在灌木开始出现并逐渐成为优势种的演替过程,物种Margalef指数和Shannon-Wiener指数均出现增大的趋势。(2)土壤水分随着退耕年限的增加也有所增加,且同一退耕年限内,随着土壤深度增加,土壤水分亦逐渐增加。(3)土壤水分对物种Margalef指数、Shannon-Wiener指数具有极显著影响,相比于其他土层,深度为40~50cm的土层对植被生长和演替的贡献最为显著。

本文引用格式

马俊梅 , 满多清 , 李得禄 , 刘有军 , 郭春秀 . 干旱荒漠区退耕地植被演替及土壤水分变化[J]. 中国沙漠, 2018 , 38(4) : 800 -807 . DOI: 10.7522/j.issn.1000-694X.2017.00040

Abstract

In this study, 27 samples from cultivated land abandoned for different years in Minqin,Gansu were surveyed by using the method of space-time interchange. Vegetation community characteristics and soil water content were analyzed by descriptive statistical analysis, and the relationship between plant succession and soil moisture was explored by multiple linear regression. The results showed that:(1) During the 18 years of natural succession of abandoned land, the natural succession process of the abandoned farmland community was as follows:mixed herbs and shrubs-single herbaceous herbs-mixed annual and perennial herbaceous community-shrub species increase and gradually the dominant species. The diversity and richness index of the species increased during the 18 years. (2) Soil moisture increased at different soil depths and gradually increased with the increase of soil depth during the same time. (3) Soil moisture has a significant effect on species Margalef index and Shannon-Wiener index. Compared with other soil layers, the soil layer of 40-50 cm depth has the most significant contribution to vegetation growth and succession.

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