逄蕾,肖洪浪,路建龙,周茂先.干旱半干旱地区砂田交界层土壤微生物区系研究[J].干旱地区农业研究,2011,29(1):96~101
干旱半干旱地区砂田交界层土壤微生物区系研究
Study on soil micro flora in boundary soil layer of gravel and sand mulched field in arid and semiarid area of China
  
DOI：10.7606/j.issn.1000-7601.2011.01.18
中文关键词:  砂田  交界层  微生物区系  环境因子  干旱半干旱地区
英文关键词:gravel and sand mulched field  gravel-sand mulched and soil boundary layer  micro flora  environmental factors  arid and semiarid area
基金项目:国家科技支撑课题(2007BAD88B07-4、2006BAD26B02)；国家科技重大专项子专题(2008ZX07526-002-05)
作者单位
逄蕾 中国科学院寒区旱区环境与工程研究所， 甘肃 兰州 730000； 甘肃省干旱生境作物学重点实验室， 甘肃 兰州 730070 
肖洪浪 中国科学院寒区旱区环境与工程研究所， 甘肃 兰州 730000 
路建龙 甘肃农业大学农学院， 甘肃 兰州 730070 
周茂先 中国科学院寒区旱区环境与工程研究所， 甘肃 兰州 730000 
摘要点击次数: 232
全文下载次数: 134
中文摘要:
      为探讨干旱半干旱地区砂田土壤微生物特征，对不同 砂龄砂田交界层土壤微生物区系及其影响因素进行试验研究。结果表明：在交界层土壤中的微生物区系以细菌为主，放线菌次之，真菌最少；砂田交界层土壤微生物数量与砂田砂龄有关，砂龄为13 a的土壤细菌数量达最高，砂龄为26 a砂田，土壤真菌数量达最高，放线菌的数量和比例都达到最大；随着砂田的老化程度加深，细菌数量减少，真菌和放线菌的数量增加，土壤微生物数量可以作为监测砂田老化程度的指标之一。碳源是限制微生物生长的主要因素之一；在较小的pH值变动范围内，pH值对细菌、真菌和放线菌的数量无显著影响，土壤呼吸强度与细菌数量有关；土壤水分是限制微生物生长的主要因素。
英文摘要:
      To study the soil microbial characters in gravel and sand mulched field (GSMF) in arid and semiarid area, the soil micro flora and the influence factors of GSMF and its boundary layer in different age of GSMF had been studied through experimentation. The results showed that the quantity of micro flora in boundary layer was bacteria＞actinomycete＞fungi. It is related on soil microbial number and the age of GSMF, that is the number of bacteria reached the highest number when the age of GSMF was 13 a. When the age of GSMF was 26 a, the number of fungi and actinomycete reached the highest number, and the percentage of actinom ycete reached the highest rate of total microbial number too. That was with the aging degree adding of the GSMF, the number of bacteria decreased, and the number of fungi and actinomycete increased. So the number of microbial can be the target that forecast the aging degree of the GSMF. C source was one of the main factors that restrict microbial development. It was no significant influence to bacteria, fungi and actinomycete by pH value when it in lesser alteration. The soil respiration intensity was related to bacteria quantity. Soil moisture content is the main factor which restricts bacteria development.
查看全文  查看/发表评论  下载PDF阅读器