Research on the dynamic changes of soil properties of typical steppe in the restoring process

Abstract

Abstract: Soil properties of typical steppe response to restoring succession progress were measured in a grassland experiment site in Taipusi county of Inner Mongolia, China. The grasslands have been exclosed (April to September every year) for 7,10,13 and 20 years, respectively. Soil samples were collected in mid-August in 2008, and soil physical properties, chemical properties as well as biological properties were monitored. Results showed that the soil properties presented a series evolution tendency during grassland restoration succession process. Compared with continuous grazing areas, exclosing treatment over 7 to 20 years significantly decreased the soil bulk density in the layer of 0-30 cm (P＜0.05), and increased both silt-clay content and soil porosity (P＜0.05). In addition, exclosed grasslands had significantly higher soil organic matter, total nitrogen, total phosphorus, available nitrogen, available phosphorus, available potassium, microbe quality and microbial biomass than continuous grazing areas, especially in the layer of 0-10 cm. Soil structure and quality could be deteriorated again and recovered grassland would present the second retrogressive succession due to continuous hay cutting. Further studies are needed to investigate rational use of typical steppe during their restoring process.

CLC Number:

S812.2

SHAN Gui-lian, CHU Xiao-hui, TIAN Qing-song, MA Yu-bao, LI Ling-hang, CHEN Gong. Research on the dynamic changes of soil properties of typical steppe in the restoring process[J]. Acta Prataculturae Sinica, 2012, 21(4): 1-9.

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