顾美英,徐万里,茆军,梁智,张志东,房世杰.连作对新疆绿洲棉田土壤微生物数量及酶活性的影响[J].干旱地区农业研究,2009,27(1):1~5
连作对新疆绿洲棉田土壤微生物数量及酶活性的影响
Effects of cotton continuous cropping on the amount of soil microbes and enzyme activities in Xinjiang
  
DOI:10.7606/j.issn.1000-7601.2009.01.01
中文关键词:  新疆  连作  棉花  微生物数量  酶活性
英文关键词:continuous cropping  cotton  amount of soil microbes  enzyme activities
基金项目:十一五国家科技支撑项目(2006BAD05B07);国家重点基础研究发展计划前期专项项目(2006CB708402);新疆农业科学院青年创新基金(2007Q11)
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 SciencesUrumqi, Xinjiang 830091China 
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 SciencesUrumqi, Xinjiang 830091China 
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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中文摘要:
      对新疆绿洲棉田不同连作年限棉花根际土壤微生物数量、酶活性及土壤理化性质进行研究,结果表明:(1)随着连作年限的延长,细菌数量呈现先增加后减少的趋势,真菌数量则一直在增加,放线菌趋势不明显,说明新疆绿洲棉田土壤在连作一定年限后,棉田土壤由细菌型向真菌型转变;(2)脲酶和蛋白酶活性随连作年限增加表现出先增加后减少趋势;蔗糖酶、多酚氧化酶和过氧化氢酶活性与连作年限关系不明显;(3)对微生物数量、土壤酶和土壤理化性质的相关性分析表明,脲酶和蛋白酶与细菌数量呈现良好的正相关性,其中脲酶的相关性最好,呈极显著水平(ρ<0.01),蛋白酶呈显著水平(ρ<0.05);土壤酶与放线菌和真菌之间没有明显的相关性;细菌数量与有机质、全氮和速效氮之间呈显著正相关,与总盐含量呈显著负相关。
英文摘要:
      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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