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Air and soil temperatures are important factors that contribute to hydro-thermal processes and ecosystem dynamics in permafrost regions. However, there is little research regarding soil thermal dynamics during freeze-thaw processes in permafrost regions with thermal orbits on the Tibetan Plateau. Thermal orbits can provide simplified illustrations of the relationships between air and ground temperatures...
The richness and density of soil macro-arthropods in 0–30cm soil were investigated by a method of space-for-time substitution from spring to autumn of 2008–2009 in Horqin Sand Land, Inner Mongolia, to understand the effects of grassland desertification on the temporal and spatial distribution of the soil macro-arthropod community. The results showed that: 1) grassland desertification had a serious...
Afforestation was one of most successful measures to rehabilitate desertified lands and to improve regional eco-environments in the Horqin Sand Land. A field experiment was conducted during 2005 and 2006 in the Horqin Sand Land to investigate the effects of Populus simonii plantation growth on soil crust formation and topsoil properties. The results showed that plantation establishment promoted the...
A field experiment was conducted in the Horqin sandy grassland, where desertification intensity gradients could be utilized to evaluate C and N concentration and storage in plants, litter and soil relative to the degree of desertification. The results showed that (1) grassland desertification could result in significant decreases in soil carbon and nitrogen storage, but the decrease of carbon and...
Soil erosion and sand deposition influence soil quality and crop productivity. A field experiment was conducted from 2000 to 2001in the Horqin Sandy Land along a depth gradient of wind-deposited sand to investigate changes in soil and crop growth properties. Treatments were designated as control (no excess sand deposition), shallow sand deposit (4–6 cm), moderate sand deposit (10–16 cm), and deep...
Some of the effects of land desertification on soil properties are manifested by the coarsening of the soil particlesize distribution (PSD) and the losses in organic C and nutrients. The changes and characteristics of PSD and selected chemical properties in soils at the 0-15 cm plough layer from different degrees of desertified croplands are analyzed in the semiarid Horqin Sandy Land, northern China...
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