| 科尔沁沙质草甸土壤微生物数量的垂直分布及季节动态 |
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| 引用本文： | 王少昆,赵学勇,左小安,郭轶瑞,李玉强,曲浩.科尔沁沙质草甸土壤微生物数量的垂直分布及季节动态[J].干旱区地理,2009,32(4). |
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| 作者姓名： | 王少昆 赵学勇 左小安 郭轶瑞 李玉强 曲浩 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,奈曼沙漠化研究站,甘肃,兰州,730000;中国科学院研究生院,北京,100039
2. 中国科学院寒区旱区环境与工程研究所,奈曼沙漠化研究站,甘肃,兰州,730000 |
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| 基金项目： | 中国科学院方向性项目，国家自然科学基金，国家科技支撑项目 |
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| 摘 要： | 通过对中国农牧交错带科尔沁沙质草甸土壤微生物数量的垂直分布及其季节动态的研究分析表明:(1)微生物总数、细菌和放线菌数量均表现出与降雨量同步的季节动态,即6月份较5月份有所减少,7月份增至最多,7月份以后微生物数量逐渐下降,真菌则表现出从5月份到8月份一直增加,9月份开始回落;(2)土壤微生物具有明显的垂直分布差异.细菌和放线菌的垂直分布表现出随土壤深度增加逐渐减少的趋势,真菌数量表层最高,20 cm以下变化不够规律;(3)土壤微生物的层化比率均大于2(5月份放线菌除外);(4)不同土壤生态因子对微生物的影响不同,相同因子对不同微生物类群的影响也不相同.细菌受水分影响较大,真菌与地温的变化趋势相近,放线菌与水热条件的共同作用有关.土壤养分(有机碳和全氮)与微生物数量呈显著的正相关.
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| 关 键 词： | 科尔沁沙质草甸 土壤微生物 垂直分布 季节动态 层化比率 |
Vertical distribution and seasonal dynamics of soil microbial number in sandy grassland of Horqin |
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| WANG Shao-kun,ZHAO Xue-yong,ZUO Xiao-an,GUO Yi-mi,LI Yu-qiang,QU Hao.Vertical distribution and seasonal dynamics of soil microbial number in sandy grassland of Horqin[J].Arid Land Geography,2009,32(4). |
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| Authors: | WANG Shao-kun ZHAO Xue-yong ZUO Xiao-an GUO Yi-mi LI Yu-qiang QU Hao |
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| Institution: | WANG Shao-kun1,2,ZHAO Xue-yong1,ZUO Xiao-an1,GUO Yi-rui1,LI Yu-qiang1,QU Hao1,2(1 Naiman Desertification Research Station,Cold and Arid Regions of Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,Gausu,China,2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Microbe plays a very important role in the procedure of material recycle and energy flow,and microbial ecology has become a very important discipline in the scientific research field,especially in arid and semi-arid areas.The main researches in Horqin Sand Land have been focused on vegetation,water use,soil physicochemical properties,etc.,and few have been on microbe.The paper was focused on the vertical distribution and seasonal dynamics of soil microbial numbers in sandy grassland of Horqin,Inner Mongolia... |
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| Keywords: | sandy grassland of Horqin soil microbe vertical distribution seasonal dynamics stratification ratio |
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