| 红砂植被盖度对土壤不同形态碳、氮及细菌多样性的影响 |
| |
| 引用本文： | 刘秉儒.红砂植被盖度对土壤不同形态碳、氮及细菌多样性的影响[J].干旱地区农业研究,2009,27(4):155-162. |
| |
| 作者姓名： | 刘秉儒 |
| |
| 作者单位： | 宁夏大学西部生态与生物资源开发联合研究中心,宁夏,银川,750021 |
| |
| 基金项目： | 宁夏大学自然科学基金 |
| |
| 摘 要： | 以自然恢复的红砂群落为研究对象,探讨黄土高原红砂植被不同盖度对土壤不同形态碳、氮及细菌多样性的影响,为该地区的人工生态恢复措施提供理论支撑.在兰州市南北两山植被恢复技术研究与示范基地,按照5级盖度分类法设置红砂植被盖度梯度,重点对土壤养分碳氮、微生物量碳氮和细菌多样性开展研究.结果表明:随着植被恢复,土壤有机碳 (SOC)和全氮(TN)、土壤微生物碳 (MBC)和微生物氮(MBN)逐渐提高,并且增加比较快 ,但是当总盖度达到48.73%之后,增加比较缓慢,而且增加的差异不显著.相同的植被盖度对土壤有机碳、全氮和土壤微生物碳、氮的影响趋于一致.土壤细菌多样性随植被盖度有所增加,在植被盖度达到48.73%后多样性维持在彼此接近的水平,尽管微生物多样性群落结构有差异 .在植被稀疏、物种多样性较低的干旱坡地,红砂植被盖度增加明显改善了土壤生态功能, 但是片面追求植被盖度的增加,对土壤特性改善有限.
|
| 关 键 词： | 红砂 植被盖度 土壤微生物量 细菌多样性 |
Effects of different plant cover of Reaumuria soongorica on soil carbon and nitrogen in different variety and soil bacterial diversity |
| |
| LIU Bingru.Effects of different plant cover of Reaumuria soongorica on soil carbon and nitrogen in different variety and soil bacterial diversity[J].Agricultural Research in the Arid Areas,2009,27(4):155-162. |
| |
| Authors: | LIU Bingru |
| |
| Institution: | LIU Bing-ru1,2(1.Key Lab for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education,Ningxia University,Yinchuan,Ningxia 750021,China,2.United Research Center for Exploitation of Ecology and Resources in West China,China) |
| |
| Abstract: | Soil quality restoration and soil management is the key for vegetation restoration and eco-environment sustainable development for the hilly region of the semiarid Loess Plateau.In order to provide scientific reference for vegetation restoration and soil care in the Loess Plateau,the change of soil carbon and nitrogen in different variety and soil bacterial diversity was studied by designing five gradient levels of plant cover of Reaumuria soongorica at Lanzhou Experiment Base of Environmental Afforestation... |
| |
| Keywords: | PCR-DGGE Reaumuria soongorica plant cover microbial biom ass soil bacterial diversity PCR-DGGE |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《干旱地区农业研究》浏览原始摘要信息 |
| 点击此处可从《干旱地区农业研究》下载免费的PDF全文 |
|
