Jenkinson D S, Brookes P C, Powlson D S. Measuring soil microbial biomass. Soil Biology and Biochemistry, 2004, 36: 5-7.
[2]
Yang C D, Long R J, Chen X R, et al . Study on microbial biomass and its correlation with the soil physical properties under the alpine grassland of the east of Qilian Mountains. Acta Prataculturae Sinica, 2007, 16(4): 62-68.
[3]
Wendu R L, Li G, Zhang J N, et al . The study of soil microbial biomass and soil enzyme activity on different grassland in Hulunbeier, Inner Mongolia. Acta Prataculturae Sinica, 2010, 19(5): 94-102.
[4]
Tang Y S, Wei C F, Yan T M, et al . Biological indicator of soil quality: a review. Soils, 2007, 39(2): 157-163.
[5]
Zhou Y, Xu X G, Wang F, et al . Soil microbial biomass respiration and metabolic quotient along an altitudinal gradient in Wuyi Mountain of southeastern China. Chinese Journal of Ecology, 2009, 28(2): 265-269.
[6]
Sinha S, Masto R E, Ram L C, et al . Rhizosphere soil microbial index of tree species in a coal mining ecosystem. Soil Biology and Biochemistry, 2009, 41: 1824-1832.
[7]
Fu H, Wang Y R, Wu C X, et al . Effects of grazing on soil physical and chemical properties of Alxa desert grassland. Journal of Desert Research, 2002, 22(4): 339-343.
[8]
Zhou Z Y, Yan S Y, Qin Y, et al . The characters of shrubby diversity of Alxa arid desert region. Journal of Arid Land Resources and Environment, 2009, 23(9): 146-150.
[9]
Yang Z P, Zhang Q, Wang Y L, et al . Spatial and temporal variability of soil properties under Caragana microphylla shrubs in the northwestern Shanxi Loess Plateau, China. Journal of Arid Environments, 2011, 75: 538-544.
[10]
Maestre F T, Bowker M A, Puche M D, et al . Shrub encroachment can reverse desertification in semi-arid Mediterranean grasslands. Ecology Letters, 2009, 12(9): 930-941.
[11]
Xiong X G, Han X G. Resource islands and its roles in the thicketization of grasslands and thicketization-grasslands. Acta Prataculturae Sinica, 2006, 15(1): 9-14.
[12]
Jia G M, Liu B R, Wang G, et al . The microbial biomass and activity in soil with shrub ( Caragana korshinskii K.) plantation in the semi-arid loess plateau in China. European Journal of Soil Biology, 2010, 46: 6-10.
[13]
Yin C H, Feng G, Tian C Y, et al . Enrichment effects of soil organic matter and salinity under the tamarisk shrubs in arid area. Chinese Journal of Eco-Agriculture, 2008, 16(1): 263-265.
[14]
Shan L S, Li Y, Dong Q L, et al . Ecological adaptation of Reaumuria soongorica root system architecture to arid environment. Journal of Desert Research, 2012, 32(5): 1283-1290.
[15]
Jin Y X, Xu B, Yang X C, et al . Belowground biomass and features of environmental factors in the degree of grassland desertification. Acta Prataculturae Sinica, 2013, 22(5): 44-51.
[16]
Zhang H, Shi P J, Zheng Q H. Research progress in relationship between shrub invasion and soil heterogeneity in a natural semi-arid grassland. Acta Phytoecologica Sinica, 2001, 25(3): 366-370.
[17]
Kang J. Soil Microbial Biomass Carbon and Nitrogen in Different Grassland Types on the Western Slopes of the Helan Mountains, China[D]. Lanzhou: Lanzhou University, 2006.
[18]
Martikainen P J, Palojarvi A. Evaluation of the fumigation extraction method for the determination of microbial C and N in a range of forest soils. Soil Biology and Biochemistry, 1990, 22: 797-802.
[19]
Mazzarino M J, Oliva L, Abril A, et al . Factors affecting nitrogen dynamics in a semiarid woodland. Plant and Soil, 1991, 138: 85-98.
[20]
Li X Z, Qu Q H. Soil microbial biomass carbon and nitrogen in Mongolian grassland. Acta Pedologica Sinica, 2002, 39(1): 97-104.
Rao N S S. Soil Microbiology[M]. Enfield: Science Publishers, Inc., 1999.
[39]
Wu J G, Ai L. Soil microbial activity and biomass C and N content in three type typical ecosystems in Qilian Mountains, China. Journal of Plant Ecology, 2008, 32(2): 465-476.
[40]
Liu B, Zhao W Z, Yang R. Characteristics and spatial heterogeneity of Tamarix ramosissima nebkhas at Desert-Oasis ecotone. Acta Ecologica Sinica, 2008, 28(4): 1446-1455.
[41]
Dougill A J, Thomas A D. Nebkha dunes in the Molopo Basin, South Africa and Botswana: formation controls and their validity asindicators of soil degradation. Journal of Arid Environments, 2002, 50: 413-428.
[42]
Zhang P J, Yang J, Song B Y, et al . Spatial heterogeneity of soil resources of Caragana tibetica community. Chinese Journal of Plant Ecology, 2009, 33(2): 338-346.
[43]
Zhao J, Yang J, Shao Y Q. Microbiological quantitive assessment on soil health in a degraded grassland microbiological quantitative assessment on soil health in a degraded grassland. Journal of Agro-Environment Science, 2007, 26(6): 2090-2094.
