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Purpose <p>Vegetation restoration is the main approach to maintain ecosystem stability in ecologically fragile areas. How to improve the water supplementation of deep soil under rainfall and the water retention of shallow soil under drought through rationally selecting revegetation types is very important to maintain vegetation growth sustainability in semi-arid areas. However, the effects of revegetation types on soil water infiltration and shallow soil water retention in the long-term revegetation area need to be clarified further.</p> Materials and Methods <p>In this study, we evaluated soil hydraulic properties under five vegetation types, pure forest land (FL), pure shrub land (SL), mixed forest-shrub land (FSL), grass land (GL), and deserted land (DL).</p> Results and Discussion <p>Compared with GL and DL, soil bulk density was significantly decreased in FL, SL, and FSL. Total porosity and capillary porosity in FSL were obviously higher than others. In FSL, the field capacity was significantly increased by 334%, 310%, 243%, and 169% (<i>P</i> &lt; 0.05), and the capillary water capacity was increased by 124%, 138%, 88.4%, and 77.5% (<i>P</i> &lt; 0.05), compared with DL, GL, FL, and SL, respectively. Additionally, in FSL, the initial infiltration rate was higher 239%, 192%, and 68.0% (<i>P</i> &lt; 0.05), and the stable infiltration rate was higher 358%, 274%, and 54.6% (<i>P</i> &lt; 0.05), than DL, GL, and FL, respectively. In SL, the initial infiltration rate was improved by 223% and 178% (<i>P</i> &lt; 0.05), and the stable infiltration rate was improved by 369% and 282% (<i>P</i> &lt; 0.05), compared with DL and GL, respectively. The stable infiltration rate in FL was obviously higher 196% than DL and 142% than GL (<i>P</i> &lt; 0.05), however, there were no significant differences in that between FSL and SL.</p> Conclusions <p>Pure forest and shrub could improve soil infiltration capacity to increase soil water replenishment during rainfall, but improving water holding capacity to enhance water retention may be hard to achieve during drought. However, mixed forest-shrub simultaneously enhanced both water retention and soil infiltration capacity. Our findings provide insight into how to reasonably select revegetation type to achieve sustainable revegetation in semi-arid ecosystems.</p>

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Mixed Forest-Shrub had Greater Improved Effects on Topsoil Hydraulic Properties Compared with Pure Forest and Shrub in a Semi-Arid Area

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Weiqian Li,
  • Gang Chen,
  • Jinjun Cai,
  • Jiyong Zheng,
  • Yitong Liu,
  • Yan Wu,
  • Tianning Wang,
  • Hongrui Sun,
  • Ke Wang

摘要

Purpose

Vegetation restoration is the main approach to maintain ecosystem stability in ecologically fragile areas. How to improve the water supplementation of deep soil under rainfall and the water retention of shallow soil under drought through rationally selecting revegetation types is very important to maintain vegetation growth sustainability in semi-arid areas. However, the effects of revegetation types on soil water infiltration and shallow soil water retention in the long-term revegetation area need to be clarified further.

Materials and Methods

In this study, we evaluated soil hydraulic properties under five vegetation types, pure forest land (FL), pure shrub land (SL), mixed forest-shrub land (FSL), grass land (GL), and deserted land (DL).

Results and Discussion

Compared with GL and DL, soil bulk density was significantly decreased in FL, SL, and FSL. Total porosity and capillary porosity in FSL were obviously higher than others. In FSL, the field capacity was significantly increased by 334%, 310%, 243%, and 169% (P < 0.05), and the capillary water capacity was increased by 124%, 138%, 88.4%, and 77.5% (P < 0.05), compared with DL, GL, FL, and SL, respectively. Additionally, in FSL, the initial infiltration rate was higher 239%, 192%, and 68.0% (P < 0.05), and the stable infiltration rate was higher 358%, 274%, and 54.6% (P < 0.05), than DL, GL, and FL, respectively. In SL, the initial infiltration rate was improved by 223% and 178% (P < 0.05), and the stable infiltration rate was improved by 369% and 282% (P < 0.05), compared with DL and GL, respectively. The stable infiltration rate in FL was obviously higher 196% than DL and 142% than GL (P < 0.05), however, there were no significant differences in that between FSL and SL.

Conclusions

Pure forest and shrub could improve soil infiltration capacity to increase soil water replenishment during rainfall, but improving water holding capacity to enhance water retention may be hard to achieve during drought. However, mixed forest-shrub simultaneously enhanced both water retention and soil infiltration capacity. Our findings provide insight into how to reasonably select revegetation type to achieve sustainable revegetation in semi-arid ecosystems.