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JOURNAL OF DESERT RESEARCH  2013, Vol. 33 Issue (2): 529-535    DOI: 10.7522/j.issn.1000-694X.2013.00072
    
Effects of Afforestation on the Abundance, Biomass Carbon and Enzymatic Activities of Soil Microorganism in Sandy Dunes
WANG Shao-kun, ZHAO Xue-yong, ZHANG Tong-hui, LI Yu-qiang, LIAN Jie, HUANG Wen-da, YUN Jian-ying
Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Acedemy of Sciences, Lanzhou 730000, China
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Abstract  

In order to investigate the effects of afforestation on soil microbial abundance, microbial biomass carbon and enzymatic activities in sandy dunes, around 20-year-old Pinus sylvestris var. mongolica (PSM) and Populus simonii Carr. (PSC) mature forests were selected in Horqin Sandy Land, and mobile dunes were set as controls (CK). The results showed that PSM and PSC plantation could improve soil physiochemical properties and increase microbiological activities significantly. Soil microbial abundance, microbial biomass carbon and enzymatic activities showed an order of PSC>PSM>CK. Soil total microbial abundance in PSM and PSC were 50.16 and 72.48 times of that in CK, and the differences were significant among PSM, PSC and CK. Soil microbial biomass carbon in PSM and PSC were 23.67 and 33.34 times of that in CK, and the difference was insignificant between PSM and PSC. Soil enzymatic activities, including dehydrogenase (DEH), peroxidase (PER), protease (PRO), urease (URE) and cellobiohydrolase (CEL) activities in PSM and PSC were 19.00 and 27.54, 4.78 and 9.89, 4.05 and 8.67, 29.93 and 37.46, 9.66 and 13.42 times, repectively, of that in CK. Pinus sylvestris var. mongolica and Populus simonii Carr. are both efficient tree species to improve soil physiochemical and microbiological properties in sandy land, and moreover, they are both efficient tree species to fix mobile dunes in Horqin Sandy Land. Cmic∶C ratio is an efficient indicator to estimate soil stability and availability, and based on an overall consideration of plantation stability and sustainability, Pinus sylvestris var. mongolica  was better than Populus simonii Carr. to fix mobile dunes in sandy land.

Key words:  mobile dune      Pinus sylvestris var. mongolica      Populus simonii      microbial abundance      microbial biomass carbon      soil enzymatic activities      Horqin Sandy Land     
Received:  01 June 2012      Published:  25 June 2012
ZTFLH:  S154.36  

Cite this article: 

WANG Shao-kun, ZHAO Xue-yong, ZHANG Tong-hui, LI Yu-qiang, LIAN Jie, HUANG Wen-da, YUN Jian-ying. Effects of Afforestation on the Abundance, Biomass Carbon and Enzymatic Activities of Soil Microorganism in Sandy Dunes. JOURNAL OF DESERT RESEARCH, 2013, 33(2): 529-535.

URL: 

http://www.desert.ac.cn/EN/10.7522/j.issn.1000-694X.2013.00072     OR     http://www.desert.ac.cn/EN/Y2013/V33/I2/529

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