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Response of soil microorganisms after converting a saline desert to arable land in central Asia

文献类型： 外文期刊

作者： Liu, Shenglin 1 ; Maimaitiaili, Baidengsha 2 ; Joergensen, Rainer Georg 3 ; Feng, Gu 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Nucl Technol & Biotechnol, Urumqi 830091, Xinjiang, Peoples R China

3.Univ Kassel, Soil Biol & Plant Nutr, D-37213 Witzenhausen, Germany

关键词： Salinity;Amino sugars;Microbial biomass C;Ergosterol;PLFA

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

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收录情况： SCI

摘要： Uncultivated saline lands are reserve resources for arable land without environmental degradation. A field experiment was conducted in a continuously cultivated farm station in Xinjiang province, northwest China, including a saline-desert land. The objective was to investigate the effects of different cotton cultivation periods from 1 to 16 years on soil chemical and soil biological properties. Cultivation led to a decrease in soil electrical conductivity and reduced soil pH from 8.9 in uncultivated land to 7.9. Soil organic C showed a small and variable increase after cultivation. After year 1 of cultivation, the contents of muramic acid, galactosamine and glucosamine were all roughly 30% lower, similarly to those of PLEA in comparison with the uncultivated soil. Further cultivation led to a continuous non-linear 40% increase until year 16 in comparison with the uncultivated soil, which mainly occurred within five years of cultivation. The ratio of fungal C to bacterial C, based on fungal glucosamine and bacterial muramic acid, varied around 0.7 in the uncultivated soil and around 1.4 from the second year on after cultivation. Microbial biomass C showed a 100% increase to contents around 300 mu g g(-1) soil from year 4 to 16 in comparison with the initial values. The microbial biomass C to SOC ratio ranged from 2 to 6% without clear cultivation effects. The ergosterol to microbial biomass C ratio increased from values around 0.04% during the first 3 years to values around 0.2% from year 4 on. Also, the Gram-negative to Gram-positive bacterial PLEA ratio increased with increasing cultivation time, whereas the microbial biomass C to total PLEA ratio varied in a relatively small range around 8.9 mu g nmol(-1). (C) 2015 Elsevier B.V. All rights reserved.

  • 相关文献

[1]Indigenous arbuscular mycorrhizal fungi can alleviate salt stress and promote growth of cotton and maize in saline fields. Liu, Shenglin,Guo, Xiuli,Feng, Gu,Liu, Shenglin,Guo, Xiuli,Feng, Gu,Maimaitiaili, Baidengsha,Fan, Jialin,He, Xinhua.

[2]Localized ammonium and phosphorus fertilization can improve cotton lint yield by decreasing rhizosphere soil pH and salinity. Liu, Shenglin,Zhang, Shaomin,Li, Hongbo,Feng, Gu,Wang, Xin-Xin,Liu, Shenglin,Zhang, Shaomin,Li, Hongbo,Feng, Gu,Zhang, Shaomin,Maimaitiaili, Baidengsha,Liu, Shenglin,Rengel, Zed,Wang, Xin-Xin. 2018

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