Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (3): 553-558.DOI: 10.11733/j.issn.1007-0435.2016.03.011

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Response of Soil Microbial Biomass Carbon and Nitrogen on A Short-term Fertilizing N in Leymus chinensis meadow

ZHU Rui-fen, TANG Feng-lan, LIU Jie-lin, LIU Feng-qi, CHEN Ji-shan   

  1. Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Science, Harbin, Heilongjiang Province 150086, China
  • Received:2015-06-01 Revised:2016-01-14 Online:2016-06-15 Published:2016-09-18

羊草草甸草原土壤微生物生物量碳氮对短期施氮的响应

朱瑞芬, 唐凤兰, 刘杰淋, 刘凤歧, 陈积山   

  1. 黑龙江省农业科学院草业研究所, 黑龙江 哈尔滨 150086
  • 通讯作者: 陈积山
  • 作者简介:朱瑞芬(1982-),女,甘肃陇南人,硕士,主要从事牧草根际微生物及促生菌研究,E-mail:gscjs2008@aliyun.cn
  • 基金资助:

    农业部公益性行业专项（201403048-0400）资助

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Abstract:

To investigate a short-term response of soil microbial biomass carbon and nitrogen (SMBC, SMBN) in Leymus chinensis meadow, experiments were conducted by a split-plot design with clipping treatment in the whole plot, and the subplots were treated with fertilizer N. We observed that soil microbial biomass carbon and nitrogen were tending to increase with increasing nitrogen application (P<0.05). It showed that soil microbial biomass carbon (SMBC) and soil organic matter (SOM) content was a significantly positively correlated relationship (P<0.01), while microbial biomass nitrogen (SMBN) and soil nitrogen content was significantly positively correlated (P<0.01). The pH value and soil microbial biomass carbon and nitrogen (SMBC, SMBN) was a significant negative correlation (P<0.01). Soil microbial biomass carbon (SMBC) and soil organic matter (SOM), microbial biomass nitrogen (SMBN) and total soil nitrogen was significant positively correlated (P<0.01). Ordination diagram better explains the relationship between short-term Fertilizing N and SMBC, SMBN and soil environmental factors (78.5%).

Key words: Leymus chinensis meadow, Fertilizing N, Soil microbial biomass carbon and nitrogen

摘要：

以松嫩草原羊草草甸为研究对象，通过测定4个不同施氮水平处理的土壤微生物生物量碳氮（Soil Microbial Biomass Carbon SMBC，Soil Microbial Biomass Nitrogen SMBN）探讨其对短期施氮的响应。结果表明，在一定范围内随着施氮量的增加，土壤微生物生物量碳氮显著增加（P<0.05）；相关性分析表明，土壤微生物生物量碳（SMBC）与土壤有机质（SOM）含量呈极显著正相关关系（P<0.01），土壤微生物生物量氮（SMBN）与土壤全氮含量呈极显著正相关关系（P<0.01）。pH值与土壤微生物生物量碳氮（SMBC，SMBN）呈极显著负相关关系（P<0.01）。土壤微生物生物量碳（SMBC）与土壤有机质（SOM），土壤微生物生物量氮（SMBN）与土壤全氮呈显著正相关（P<0.05）。典范对应分析（CCA）排序图较好的解释了短期施氮处理与土壤微生物量碳氮、土壤环境因子3者之间的关系（78.5%）。

关键词: 羊草草甸, 施氮, 微生物生物量碳氮

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