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雪被去除对川西高山冷杉林冬季土壤微生物生物量碳氮和可培养微生物数量的影响
  • ISSN号:1001-9332
  • 期刊名称:Chinese Journal of Applied Ecology
  • 时间:2012.7.7
  • 页码:1809-1816
  • 分类:S152.8[农业科学—土壤学;农业科学—农业基础科学] S718.8[农业科学—林学]
  • 作者机构:[1]四川农业大学生态林业研究所/生态林业工程重点实验室,成都611130, [2]四川省阿坝藏族羌族自治州川西林业局,四川理县623102
  • 相关基金:国家自然科学基金项目(31170423,31000213); “十二五”国家科技支撑计划项目(2011BAC09B05); 教育部博士点基金项目(20105103110002); 国家博士后科学基金项目(20110491732); 四川省青年科技基金项目(2012JQ0059); 四川省科技支撑计划项目(2010NZ0051)资助
  • 相关项目:高山森林雪被斑块对凋落物分解的影响
中文摘要:

为了解气候变暖情景下雪被减少对冬季土壤微生物特征的影响,采用人工遮雪的方法,研究了雪被去除对原始冷杉林土壤微生物生物量和可培养微生物数量的影响.结果表明:雪被去除显著影响土壤微生物生物量碳(MBC)和氮(MBN)以及可培养细菌和真菌数量,但土壤微生物在雪被覆盖不同阶段具有不同的响应特征.在雪被去除处理下,土壤有机层MBC和MBN在雪被形成初期和雪被融化前期显著降低,而在雪被覆盖期和雪被融化后期显著增加;在雪被形成初期至雪被覆盖期,可培养细菌数量都显著降低,但可培养真菌数量都显著增加.雪被融化后,雪被去除显著降低土壤有机层MBC和可培养真菌数量,显著增加可培养细菌数量,对MBN无显著影响.矿质土壤层MBC、MBN和可培养微生物数量在雪被去除下的变化趋势与土壤有机层基本一致,但波动较小.雪被去除还改变了川西高山冷杉林冬季土壤微生物类群比,提高了土壤可培养真菌数量的冬季优势.

英文摘要:

To understand the effects of the lack of snow pack under global warming on the characteristics of soil microorganisms during wintertime,a snow-shading experiment was conducted in a primary fir(Abies faxoniana) forest after snow pack removal,with the soil microbial biomass carbon(MBC) and nitrogen(MBN) and soil culturable microorganisms(bacteria and fungi) at the stages of snow forming,snow covering,and snow melting investigated.Snow pack removal had significant effects on the soil MBC and MBN and the number of soil culturable bacteria and fungi,but the responses of the culturable microorganisms differed with the stages of snow-shading.Under the condition of snow pack removal,the MBC and MBN in soil organic layer decreased significantly at the early stages of snow forming and snow melting but increased significantly at snow covering stage and at the later stage of snow melting,and the number of culturable bacteria decreased significantly from the early stage of snow forming to the stage of snow covering while that of culturable fungi had a significant increase from the early stage of snow forming to the stage of snow melting.After snow melting,the MBC and the number of culturable fungi in soil organic layer had a significant decrease,the number of cultural bacteria was in adverse,but the MBN had less change.The MBC and MBN and the number of culturable microorganisms in soil mineral layer had the similar variation trends as those in soil organic layer,but the fluctuations were smaller.It was suggested that snow pack removal changed the ratio of culturable bacteria to culturable fungi,showing positive effects on the number of soil culturable fungi during wintertime in alpine Abies faxoniana forest of western Sichuan.

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期刊信息
  • 《应用生态学报》
  • 北大核心期刊(2011版)
  • 主管单位:中国科学院
  • 主办单位:中国生态学学会 中国科学院沈阳应用生态研究所
  • 主编:沈善敏
  • 地址:沈阳市文化路72号
  • 邮编:110016
  • 邮箱:
  • 电话:024-83970393
  • 国际标准刊号:ISSN:1001-9332
  • 国内统一刊号:ISSN:21-1253/Q
  • 邮发代号:8-98
  • 获奖情况:
  • 中国自然科学核心期刊,中国科学院优秀期刊,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),荷兰地学数据库,荷兰文摘与引文数据库,美国生物医学检索系统,美国生物科学数据库,英国动物学记录,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版)
  • 被引量:98742