Response of Soil Moisture Dynamics in Four Typical Herbaceous Communities to Extreme Drought Precipitation in the Desert Steppe

Lü Hao; WANG Xing; SONG Naiping; CHEN Juan; ZHANG Yifei; WU Xudong; YU Dian; YANG Xinguo; WANG Lei; CHEN Lin

doi:10.13870/j.cnki.stbcxb.2023.06.019

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Response of Soil Moisture Dynamics in Four Typical Herbaceous Communities to Extreme Drought Precipitation in the Desert Steppe

更新时间：2025-03-12

- Response of Soil Moisture Dynamics in Four Typical Herbaceous Communities to Extreme Drought Precipitation in the Desert Steppe
- Vol. 37, Issue 6, Pages: 145-152(2023)
- 作者机构：
  
  1. 宁夏大学生态环境学院,银川,750021
  2. 西北土地退化与生态恢复国家重点实验室培育基地,银川,750021
  3. 西北退化生态系统恢复与重建教育部重点实验室,银川,750021
  4. 宁夏大学农学院,银川,750021
  5. 宁夏农林科学院荒漠化治理研究所,银川,750002
  6. 宁夏哈巴湖国家级自然保护区管理局, 宁夏盐池,751500
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.06.019
  CLC：
- Published：2023
- 稿件说明：
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Lü Hao, WANG Xing, SONG Naiping, et al. Response of Soil Moisture Dynamics in Four Typical Herbaceous Communities to Extreme Drought Precipitation in the Desert Steppe[J]. 2023, 37(6): 145-152.
DOI：

Lü Hao, WANG Xing, SONG Naiping, et al. Response of Soil Moisture Dynamics in Four Typical Herbaceous Communities to Extreme Drought Precipitation in the Desert Steppe[J]. 2023, 37(6): 145-152. DOI： 10.13870/j.cnki.stbcxb.2023.06.019.

摘要

为明晰荒漠草原典型植物群落土壤水分对极端干旱降水的响应。以4类典型植物群落(蒙古冰草、苦豆子、短花针茅、芨芨草)为研究对象

于2020-2021年分别监测4类植物群落0-120 cm土壤含水量

探讨其土壤水分在消耗期、恢复期和稳定期的动态特征及对降水的响应。结果表明:土壤水分消耗期

土壤含水量为4.56%~7.87%

呈亏缺状态

并且随着极端干旱持续从土壤浅层0-40 cm向深层80-120 cm演变;土壤水分恢复期

较为集中的Ⅴ级降水(单次＞20 mm)能够恢复深层80-120 cm土壤水分

随着极端干旱持续

4类植物群落土壤水分的恢复主要呈现在浅层0-40 cm;土壤水分稳定期

随着极端干旱持续4类植物群落各层土壤含水量均＜10%。综合比较4类植物群落

短花针茅群落土壤含水量在各时期相对较高

且浅层和深层土壤水分恢复具有同步性

可在水分限制区域植被恢复保育具有一定参考价值。

Abstract

To clarify the response of soil moisture to extreme drought precipitation in typical plant communities in the desert steppe. In this study

the soil water content of four typical plant communities (Agropyron mongolicum

Sophora alopecuroides

Stipa breviflora

and Achnatherum splendens) in this region is studied. The 0—120 cm soil water content of these communities was monitored from 2020 to 2021

respectively

to analyze the dynamic characteristics of soil water content and its response to precipitation during the consumption

recovery

and stabilization periods. The results showed that during the soil water consumption period

the soil water maintained a deficit state of 4.56%~7.87%

and this state extended from 0—40 cm shallow soil layers to 80—120 cm deep soil layers with the continuous drought. During the soil moisture recovery period

the concentrated Ⅴ grade precipitation (single ＞20 mm) could restore the soil moisture in the depth of 80—120 cm

and the soil moisture was mainly recovered in the shallow layers of 0—40 cm with the continuous drought. During the soil moisture stabilization period

the soil water content in each layer of the four plant communities was ＞10% as the drought continued. By comprehensive comparison of the four plant communities

the soil water content of Stipa breviflora community was relatively high in each period

and the soil water recovery of this community was synchronized in the shallow layers and deep layers

which has important reference value for vegetation restoration and conservation in the water-restricted areas.

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