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Forest and Grassland Resources Research ›› 2023›› Issue (6): 52-60.doi: 10.13466/j.cnki.lczyyj.2023.06.006

• Scientific Research • Previous Articles     Next Articles

Soil Moisture Characteristics and Its Response to Precipitation of Typical Plantation in Mu Us Sandy Land

BAI Xingwen1(), BU Rigude1, HONG Guangyu2(), LI Wei2, SHAO Feizhou3, ZHANG Lei2   

  1. 1. Academy of Forestry Inventory and Planning,National Forestry and Grassland Administration,Beijing 100714,China
    2. Inner Mongolia Forestry Research Institute,Hohhot 010010,China
    3. Inner Mongolia Salawusu National Wetland Park,Uxin banner,Inner Mongolia 017300,China
  • Received:2023-09-25 Revised:2023-11-29 Online:2023-12-28 Published:2024-02-21

Abstract:

Fluctuations in precipitation patterns affects the ecological stability in arid and semi-arid areas Taking typical Hedysarum laeve plantations,Salix psammophila plantations and moving dunes in Mu Us Sandy land as research objects,through continuous monitoring of precipitation and soil profile water change,the soil moisture change characteristics at 10 cm,30 cm,50 cm,70 cm,90 cm and 110 cm of three kinds of land cover types and their responses to different precipitation magnitude were analyzed.The results showed that:1)The soil moisture content changed from shallow layer to deep layer,the sand dune showed an S-shaped change,the Hedysarum laeve plantation showed a 3-shaped change,and the Salix psammophila plantation showed a continuous increase.2)During the vegetation growing season from May to October,the soil moisture content of the sand dune showed fluctuation,the Hedysarum laeve plantation showed "M" type change,and the Salix psammophila plantation showed "N" type change.3)When precipitation was the same,the response of soil moisture recharge to precipitation was hysteretic,and the initial soil moisture content and precipitation intensity affected the depth of water infiltration.The results of this study provide a theoretical basis for rational utilization and prediction of water resources in the process of ecological construction in arid and semi-arid regions.

Key words: Mu Us Sandy Land, soil moisture, plantations, precipitation pattern

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