| Effects of cotton continuous cropping on the amount of soil microbes and enzyme activities in Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2009.01.01 |
| Key Words: continuous cropping cotton amount of soil microbes enzyme activities |
| 作者 | 单位 | | 顾美英 | Institute of Microbiology, Xinjiang Academy of Agriculural Sciences， Urumqi， Xinjiang 830091, China | | 徐万里 | Institute of Soil and Fertilizer, Xinjiang Academy of Agricultural Sciences，Urumqi, Xinjiang 830091，China | | 茆军 | Institute of Microbiology, Xinjiang Academy of Agriculural Sciences， Urumqi， Xinjiang 830091, China | | 梁智 | Institute of Soil and Fertilizer, Xinjiang Academy of Agricultural Sciences，Urumqi, Xinjiang 830091，China | | 张志东 | Institute of Microbiology, Xinjiang Academy of Agriculural Sciences， Urumqi， Xinjiang 830091, China | | 房世杰 | Institute of Microbiology, Xinjiang Academy of Agriculural Sciences， Urumqi， Xinjiang 830091, China |
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| Abstract: |
| The amount of rhizosphere soil microbes and enzy me activity and soil phy sical and chemical prop
erties in cotton continuous cropping in Xinjjang were st udied. The results showed:(1) With increasing continu
ous cropping years，bacteria were first increased and then decreased, while the amount of F ungi w as decreased. The number of actinomycete w as not obv iously affected, and cotton soils converted from bacteria type to fungitype after continuous cropping. (2) Activities of urease and protease w ere also first increased and then decreased. (3) The correlation analy sis among the amount of soil microbes，enzy me activities and soil physical and chemical properties showed:U rease and protease w ere positively correlated w ith bacteria. The correlation betw een urease and bacteria reached extremely significant level(ρ<0.01). Protease had also reached significant level (ρ<0.05). Enzyme activity had no significant correlation with the amount of actinomycete and fungi. Bacteria had significantly positive correlation with OM，total N and avail. N and had negative correlation with total salt. |
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