Effects of Different Precipitation on Soil Properties and Ground Vegetation Distribution in Desert Shrub Microhabitats

Guo Zhixia; Liu Rentao; Feng Yonghong; Wang Wenfan; Jiang Jiayu

doi:10.13961/j.cnki.stbctb.2021.01.009

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Effects of Different Precipitation on Soil Properties and Ground Vegetation Distribution in Desert Shrub Microhabitats

- Effects of Different Precipitation on Soil Properties and Ground Vegetation Distribution in Desert Shrub Microhabitats
- Bulletin of Soiland Water Conservation Vol. 41, Issue 1, Pages: 56-65(2021)
- 作者机构：
  
  1. 宁夏大学农学院,宁夏,银川,750021
  2. 宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏,银川,750021
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.01.009
  CLC： Q948.1
- Published：2021
- 稿件说明：
移动端阅览
Guo Zhixia, Liu Rentao, Feng Yonghong, et al. Effects of Different Precipitation on Soil Properties and Ground Vegetation Distribution in Desert Shrub Microhabitats[J]. Bulletin of Soiland Water Conservation, 2021, 41(1): 56-65.
DOI：

Guo Zhixia, Liu Rentao, Feng Yonghong, et al. Effects of Different Precipitation on Soil Properties and Ground Vegetation Distribution in Desert Shrub Microhabitats[J]. Bulletin of Soiland Water Conservation, 2021, 41(1): 56-65. DOI： 10.13961/j.cnki.stbctb.2021.01.009.

摘要

[目的] 揭示荒漠灌丛土壤理化性质及地表草本分布特征对降水分布变化的响应，为干旱风沙区人工植被建设模式选择、沙漠化防治及未来应对气候变化提供依据。[方法] 在榆林市榆阳区、盐池县、沙坡头保护区，以共有人工栽植灌丛柠条（Caragana korshinskii）、油蒿（Artemisia ordosica）为研究对象，以灌丛外裸地为对照，测定了灌丛内外微生境中土壤含水量、容重、pH值、电导率、全碳、全氮及土壤粒径含量，并调查了灌丛内外微生境地表草本植被分布特征。[结果] ①榆阳研究区柠条灌丛显著提高土壤粗沙粒含量、草本植物个体数，降低土壤容重、土壤pH值；油蒿灌丛显著提高土壤黏粉粒含量、全碳、全氮（p<0.05），降低草本植物物种数。盐池研究区柠条灌丛增加土壤全碳、全氮、草本植物高度，降低土壤细沙粒含量、土壤容重、草本植物物种数；油蒿灌丛降低土壤黏粉粒含量、草本植物物种数。沙坡头研究区柠条灌丛降低土壤电导率；油蒿灌丛下无草本植物。②从沙坡头到榆阳区，随降水量增加，灌丛微生境土壤细沙粒含量、土壤容重和土壤电导率降低，而土壤养分相对增加，草本植物物种数、个体数、高度均相对增加。[结论] 荒漠区造林策略取决于灌丛种类和降水分布。榆阳研究区栽植柠条和油蒿灌丛、盐池研究区栽植柠条灌丛、沙坡头研究区栽植柠条灌丛更有利于促进沙漠化治理与固沙林地土壤-植被系统恢复。

Abstract

[Objective] The distribution of soil physical and chemical properties and herbaceous vegetation among desert shrub microhabitats and their responses to precipitation change were studied to provide a basis for artificial afforestation and desertification control under future climate change in arid desertified regions.[Methods] The afforested shrubs

including Caragana korshinskii and Artemisia ordosica

were selected as research objects. The microhabitats inside and outside shrub canopies were set as sampling sites. At each sampling site

soil water content

bulk density

pH value

electrical conductivity

total carbon

total nitrogen

and soil particle size were measured

and the distribution of herbaceous vegetation was investigated

along with the climatic gradient

in the Yuyang

Yanchi

and Shapotou areas.[Results] ① In Yuyang area

soil coarse sand content and herbaceous abundance significantly increased

while the soil bulk density and soil pH value decreased in the C. korshinskii shrub microhabitats relative to the open space. Soil clay content

total carbon

and total nitrogen significantly increased

while herbaceous abundance declined in the A. ordosica shrub microhabitats relative to the open space. In Yanchi area

soil total carbon

total nitrogen

and herbaceous plant height increased

while soil fine sand content

soil bulk density

and herbaceous species richness decreased in the C. korshinskii shrub microhabitats relative to the open space. Soil clay content and herbaceous species richness decreased in the A. ordosica shrub microhabitats relative to the open space. In Shapotou area

soil electrical conductivity decreased in the C. korshinskii shrub microhabitats

while there were no herbaceous plants observed in A. ordosica shrub microhabitats relative to the open space. ② Along with the increase in the precipitation amount from the Shapotou area toward the Yuyang area

soil fine sand content

soil bulk density

and soil electrical conductivity decreased

while soil nutrients and herbaceous species richness

abundance

and height increased.[Conclusion] The afforestation strategies in desertified regions depended on shrub species and the precipitation distribution. C. korshinskii and A. ordosica shrubs afforested in Yuyang

C. korshinskii shrubs afforested in Yanchi

and C. korshinskii shrubs afforested in Shapotou could be an option for the recovery of soil-vegetation systems in desertified regions.

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