Hydraulic Properties of Zokor Mounds with Different Forming Time in Zoige Grassland

WANG Honglan; JIANG Shuanyuan; CUI Junfang; TANG Xiangyu

doi:10.13870/j.cnki.stbcxb.2018.03.028

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Hydraulic Properties of Zokor Mounds with Different Forming Time in Zoige Grassland

更新时间：2025-03-12

- Hydraulic Properties of Zokor Mounds with Different Forming Time in Zoige Grassland
- Vol. 32, Issue 3, Pages: 180-184(2018)
- 作者机构：
  
  1. 四川省中医药科学院,成都,610041
  2. 中国科学院成都山地灾害与环境研究所,成都,610041
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.03.028
  CLC：
- Published：2018
- 稿件说明：
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WANG Honglan, JIANG Shuanyuan, CUI Junfang, et al. Hydraulic Properties of Zokor Mounds with Different Forming Time in Zoige Grassland[J]. 2018, 32(3): 180-184.
DOI：

WANG Honglan, JIANG Shuanyuan, CUI Junfang, et al. Hydraulic Properties of Zokor Mounds with Different Forming Time in Zoige Grassland[J]. 2018, 32(3): 180-184. DOI： 10.13870/j.cnki.stbcxb.2018.03.028.

摘要

为探寻高原鼢鼠活动对若尔盖草原土壤持水性能的影响，通过田间原位张力入渗和室内沙箱+压力膜仪试验，探索不同形成时间鼠丘土壤水力学参数以及土壤大孔隙度的差异。结果表明：与草地对照相比，鼠丘土壤中易于流失的结构性孔隙水（θstr）含量增加，而能被植物有效利用的基质性孔隙水（θtxt）含量下降（由对照组（0.14±0.02） cm3/cm3降低至（0.10±0.02） cm3/cm3）。新鼠丘和1年鼢鼠鼠丘中半径>250 μm中大孔隙的有效孔隙度较草地对照组分别平均增加30%和11%，饱和导水率分别平均增加38%和21%。高原鼢鼠活动改变了土壤水力学特征，降低了土壤有效水的持水量，提高了土壤饱和导水率，使草地保水能力下降，易出现水分亏缺，增加草地退化和逐步沙化的风险。

Abstract

Application of Disc permeameter in field and sandbox-pressure chamber in door was used to determine hydraulic parameters and pore size distribution for soil samples of various aged plateau zokor mounds on Zoige grassland. Compared to the control grassland soil

the water content in structural pores (θstr) of mounds increased

while the water content in soil textural pores (θtxt) decreased from (0.14±0.02) cm3/cm3 to (0.10±0.02) cm3/cm3

indicating a potential of a quicker water infiltration through mound soil via soil structural pores. In soil with newly-formed mound and one-year-old mound

the effective porosity of soil pores with size r > 250 μm increased by 30% and 11%

and the saturated hydraulic conductivity increased by 38% and 21%

respectively

compared to the control soil. Therefore

it can be concluded that the excessive activity of zokor has changed soil pore structure

caused a decrease in soil's capacity to hold plant-available water and thus may accelerate the degradation and desertification of Zoige grassland.

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