Details
| Original language | English |
|---|---|
| Pages (from-to) | 769-776 |
| Number of pages | 8 |
| Journal | Journal of Plant Nutrition and Soil Science |
| Volume | 172 |
| Issue number | 6 |
| Publication status | Published - Dec 2009 |
| Externally published | Yes |
Abstract
Increasing grazing intensities of sheep and goats can lead to an increasing degradation of grasslands. We investigated four plots of different grazing intensities (heavily grazed, wintergrazed, ungrazed since 1999, and ungrazed since 1979) in Inner Mongolia, PR China, in order to study the effects of trampling-induced mechanical stresses on soil hydraulic properties. Soil water transport and effective evapotranspiration under "heavily grazed" and "ungrazed since 1979" were modeled using the HYDRUS-1D model. Model calibration was conducted using data collected from field studies. The field data indicate that grazing decreases soil C content and hydrophobicity. Pore volume is reduced, and water-retention characteristics are modified, the saturated hydraulic conductivity decreases, and its anisotropy (vertical vs. horizontal conductivity) is influenced. Modeling results revealed higher evapotranspiration on the ungrazed site (ungrazed since 1979) compared to the grazed site (heavily grazed) due to wetter soil conditions, more dense vegetation, litter cover, and decreased runoff and drainage, respectively. Grazing modified the partitioning of evapotranspiration with lower transpiration and higher evaporation at the grazed site owing to reduced root water uptake due to reduced evaporation and a patchy soil cover.
Keywords
- Evapotranspiration, Grazing, Hydraulic conductivity, Hydraulic properties, HYDRUS-1D, Pore-size distribution, Water repellency
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Journal of Plant Nutrition and Soil Science, Vol. 172, No. 6, 12.2009, p. 769-776.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Grazing-induced alterations of soil hydraulic properties and functions in inner Mongolia, PR China
AU - Krümmelbein, Julia
AU - Peth, Stephan
AU - Zhao, Ying
AU - Horn, Rainer
PY - 2009/12
Y1 - 2009/12
N2 - Increasing grazing intensities of sheep and goats can lead to an increasing degradation of grasslands. We investigated four plots of different grazing intensities (heavily grazed, wintergrazed, ungrazed since 1999, and ungrazed since 1979) in Inner Mongolia, PR China, in order to study the effects of trampling-induced mechanical stresses on soil hydraulic properties. Soil water transport and effective evapotranspiration under "heavily grazed" and "ungrazed since 1979" were modeled using the HYDRUS-1D model. Model calibration was conducted using data collected from field studies. The field data indicate that grazing decreases soil C content and hydrophobicity. Pore volume is reduced, and water-retention characteristics are modified, the saturated hydraulic conductivity decreases, and its anisotropy (vertical vs. horizontal conductivity) is influenced. Modeling results revealed higher evapotranspiration on the ungrazed site (ungrazed since 1979) compared to the grazed site (heavily grazed) due to wetter soil conditions, more dense vegetation, litter cover, and decreased runoff and drainage, respectively. Grazing modified the partitioning of evapotranspiration with lower transpiration and higher evaporation at the grazed site owing to reduced root water uptake due to reduced evaporation and a patchy soil cover.
AB - Increasing grazing intensities of sheep and goats can lead to an increasing degradation of grasslands. We investigated four plots of different grazing intensities (heavily grazed, wintergrazed, ungrazed since 1999, and ungrazed since 1979) in Inner Mongolia, PR China, in order to study the effects of trampling-induced mechanical stresses on soil hydraulic properties. Soil water transport and effective evapotranspiration under "heavily grazed" and "ungrazed since 1979" were modeled using the HYDRUS-1D model. Model calibration was conducted using data collected from field studies. The field data indicate that grazing decreases soil C content and hydrophobicity. Pore volume is reduced, and water-retention characteristics are modified, the saturated hydraulic conductivity decreases, and its anisotropy (vertical vs. horizontal conductivity) is influenced. Modeling results revealed higher evapotranspiration on the ungrazed site (ungrazed since 1979) compared to the grazed site (heavily grazed) due to wetter soil conditions, more dense vegetation, litter cover, and decreased runoff and drainage, respectively. Grazing modified the partitioning of evapotranspiration with lower transpiration and higher evaporation at the grazed site owing to reduced root water uptake due to reduced evaporation and a patchy soil cover.
KW - Evapotranspiration
KW - Grazing
KW - Hydraulic conductivity
KW - Hydraulic properties
KW - HYDRUS-1D
KW - Pore-size distribution
KW - Water repellency
UR - http://www.scopus.com/inward/record.url?scp=72649097812&partnerID=8YFLogxK
U2 - 10.1002/jpln.200800218
DO - 10.1002/jpln.200800218
M3 - Article
AN - SCOPUS:72649097812
VL - 172
SP - 769
EP - 776
JO - Journal of Plant Nutrition and Soil Science
JF - Journal of Plant Nutrition and Soil Science
SN - 1436-8730
IS - 6
ER -