Afforestation effects on soil microbial abundance, microbial
biomass carbon and enzyme activity in dunes of
Horqin Sandy Land, northeastern China |
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| Authors: | ShaoKun Wang XueYong Zhao TongHui Zhang YuQiang Li Jie Lian WenDa Huang and JianYing Yun |
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| Institution: | 1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China
2. University of Chinese Academy of Sciences, Beijing 100039, China;Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China;1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China
2. University of Chinese Academy of Sciences, Beijing 100039, China;1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China
2. University of Chinese Academy of Sciences, Beijing 100039, China;Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese
Academy of Sciences, Lanzhou, Gansu 730000, China |
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| Abstract: | In order to investigate the effects of afforestation on soil microbial abundance, microbial biomass carbon and enzyme activity in
sandy dunes, 20-year-old Pinus sylvestris var. mongolica Litv. (PSM) and Populus simonii Carrière (PSC) mature forests were selected
in Horqin Sandy Land, and mobile dunes was set as a control (CK). Results show that PSM and PSC plantations can improve
soil physicochemical properties and significantly increase microbiological activity in mobile dunes. Soil microbial abundance,
microbial biomass carbon and enzyme activity show an order of PS>PSM>CK. Total soil microbial abundance in PSM and
PSC was respectively 50.16 and 72.48 times more than that in CK, and the differences were significant among PSM, PSC and CK.
Soil microbial biomass carbon in PSM and PSC was respectively 23.67 and 33.34 times more than that in CK, and the difference
was insignificant between PSM and PSC. Soil enzyme activity, including dehydrogenase (DEH), peroxidase (PER), protease
(PRO), urease (URE) and cellobiohydrolase (CEL) in PSM and PSC were respectively 19.00 and 27.54, 4.78 and 9.89, 4.05 and
8.67, 29.93 and 37.46, and 9.66 and 13.42 times of that in CK. P. sylvestris and P. simonii can effectively improve soil physicochemical
and microbiological properties in sandy dunes and fix mobile dunes in Horqin Sandy Land. The Cmic:C ratio is an applicable
indicator to estimate soil stability and soil water availability, and based on an overall consideration of plantation stability and
sustainability, P. sylvestris is better than P. simonii in fixing mobile dunes in sandy land. |
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