Impact of Enclosure on Soil Physicochemical Properties in Desert Grassland
Enclosure not only helps restore grassland species diversity and enhance productivity,but also helps maintain soil structure and function.Taking Sonid Desert Steppe in Inner Mongolia as research object,the impact of 10-year enclosure on the soil physicochemical properties of Sonid Desert Steppe was analyzed.The results showed that compared with the control plot,the sand content in 0-20 cm soil layer of 10-year enclosure decreased by 4.7%,while the silt and clay content increased by 14.4%and 27.2%,respectively.Enclosure for 10 years could promote the water holding capacity of 0-5 cm surface soil layer,but the water holding capacity of 5-20 cm soil layer de-creased.The contents of soil organic matter,total carbon,total nitrogen and total potassium increased by 22.8%,26.3%,16.6%and 2.2%,respectively after 10-year enclosure.The results can provide scientific basis for formulat-ing reasonable enclosure policies and systems in desert steppe.
enclosuredesert steppe in Inner Mongoliasoil physicochemical propertysoil mechanical composi-tion
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