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Studies on Soil Microbial Populations and Enzyme Activities of Degraded Hilly Meadow under Different Vegetative Restoration Measures in Yunnan Province

JIANG Hua1,BI Yu-fen1,ZHU Dong-bin1,ZHOU He2 (1.College of Animal Science,Yunnan Agricultural University,Kunming,Yunnan Province 650201,China;2.Institute of Grassland Science,China Agricultural University,Beijing 100094,China)  
There are different degrees of degradation in grasslands of Yunnan province.The effects of different vegetative restoration measures on soil microbial number,soil urease activity,and soil catalase activity were studied using enclosure,reseeding,and reconstruction at different degrees of degraded hilly meadows of Yunnan province and taking the fence outside area as CK.The results show that bacterial number from reseeding was significantly higher than other treatments and CK(P0.05),followed by enclosure and reconstruction.Fungi and actinomycetes quantities under reconstruction were the most and followed by reseeding and enclosure.For the soil urease activity and catalase activity,enclosure was in the first place and followed by reseeding and reconstruction.The correlation between the activity of soil urease or soil catalase and the number of bacteria was positively significant.
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