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内蒙古大青山土庄绣线菊根围丛枝菌根真菌多样性

赵敏1,峥嵘2,白淑兰1*,朱艳育1#br#   

  1. (1内蒙古农业大学林学院, 呼和浩特 010019; 2内蒙古师范大学生命科学与技术学院; 呼和浩特 010022)
  • 出版日期:2016-12-10 发布日期:2016-12-10

The diversity of arbuscular mycorrhizal fungi in the rhizosphere of Spiraea pubescens in the Daqingshan Mountain, Inner Mongolia, China.

ZHAO Min1, ZHENG Rong2, BAI Shu-lan1*, ZHU Yan-yu1#br#   

  1. (1College of Forestry, Inner Mongolia Agricultural University, Hohhot 010019, China; 2College of Life Science and Technology, Inner Mongolia Normal University, Hohhot 010022, China).
  • Online:2016-12-10 Published:2016-12-10

摘要: 为探明内蒙古大青山不同生境中土庄绣线菊(Spiraea pubescens)根围丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)多样性特征,选择水磨村、小井沟、白石头沟3个地点采集土庄绣线菊根围土壤,采用湿筛倾析蔗糖离心法分离AMF孢子,根据形态学方法进行鉴定。结果表明:3个地点共分离鉴定出AMF 11属48种,其中2个未知种,Glomus属在3个地点中均占有绝对优势;水磨村孢子密度显著高于小井沟和白石头沟,水磨村和小井沟的Simpson指数和均匀度指数高于白石头沟。采用冗余分析(redundancy analysis,RDA)研究了土壤理化性质与AMF群落多样性的关系,表明土壤pH、有机C、速效K与AMF丰富度呈显著正相关,其中,pH对AMF丰富度影响最大,而碱解N和速效P与AMF丰富度呈显著负相关,速效P、碱解N与Simpson指数呈显著负相关。

关键词: 深松, 微灌, 夏玉米, 产量, 土壤酶活性

Abstract: To evaluate the diversity of arbuscular mycorrhizal fungi in the rhizosphere of Spiraea pubescens in the Daqingshan Mountain of Inner Mongolia, China, soil samples were collected from three sites Shuimocun, Xiaojinggou and Baishitougou. AMF spores were separated by wetsieving and decanting procedure and centrifugation using sucrose and identified by the morphological methods. The results showed that 48 AMF species were isolated from all soil samples, belonging to 11 genera, and 2 were unidentified species. Glomus was the dominant genus in the three sites. Spore density in soil from Shuimocun was significantly higher than those from Xiaojinggou and Baishitougou. However, the Simpson index and Pielou index in Shuimocun and Xiaojinggou were higher than in Baishitougou. Redundancy analysis of the relationship between soil factors and AMF diversity showed that AMF richness was significantly positively correlated with pH, soil organic carbon and available potassium, and pH was the driving factor influencing AMF richness. Available nitrogen and available phosphorus were significantly negatively correlated with AMF richness and Simpson index.

Key words: soil enzyme activity, micro-irrigation, yield., subsoiling, summer maize