| 甘肃永昌县放牧草地土壤脲酶活性与土壤肥力的关系初探 |
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| 引用本文： | 侯彦会,周学辉,焦婷,刘荣堂,李兴福.甘肃永昌县放牧草地土壤脲酶活性与土壤肥力的关系初探[J].草业学报,2009,18(4):111-116. |
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| 作者姓名： | 侯彦会 周学辉 焦婷 刘荣堂 李兴福 |
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| 作者单位： | 1.甘肃农业大学草业学院,甘肃 兰州 730070;2.中国农业科学院兰州畜牧与兽药研究所,甘肃 兰州 730050;3.永昌县农业局,甘肃 永昌 737200 |
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| 基金项目： | 世界银行全球环境基金(GEF)项目(052456CHA-GS-Y-2)资助 |
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| 摘 要： | 2007-2008年对甘肃永昌县放牧草地土壤脲酶活性与土壤肥力因子之间的关系进行了初步研究。结果表明,2种放牧草地土壤脲酶活性不同,土壤剖面中脲酶活性的变化趋势是表层明显高于下层。土壤脲酶活性与有机质、全氮、速效氮、速效钾呈极显著正相关,与土壤pH值呈极显著负相关。通径分析结果表明,土壤肥力因子对脲酶活性的直接作用系数大小顺序为全氮>速效钾>速效氮>速效磷>pH值>有机质。有机质对脲酶活性的直接效应较小,主要通过全氮表现为较强的间接效应。全氮对脲酶活性具有显著的直接效应。土壤速效氮、速效磷和速效钾对脲酶活性的直接作用不大,主要通过全氮对脲酶活性产生间接影响。土壤pH值对脲酶活性所起的直接效应和间接效应均较小,不是影响土壤脲酶活性的主要因素。
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| 关 键 词： | 脲酶活性 土壤肥力 通径分析 放牧草地 |
| 收稿时间： | 1900-01-01; |
A preliminary study on the relationship between soil urease activity and soil fertility in the grazing grasslands of Yongchang county, Gansu province |
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| HOU Yan-hui,ZHOU Xue-hui,JIAO Ting,LIU Rong-tang,LI Xing-fu.A preliminary study on the relationship between soil urease activity and soil fertility in the grazing grasslands of Yongchang county, Gansu province[J].Acta Prataculturae Sinica,2009,18(4):111-116. |
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| Authors: | HOU Yan-hui ZHOU Xue-hui JIAO Ting LIU Rong-tang LI Xing-fu |
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| Institution: | 1.College of Pratacultural Science, Gansu Agricultural University, Lanzhou 730070, China; 2.Lanzhou Institute of Animal Science and Veterinary Pharmaceutics Science of Chinese Academy of Agricultural Science, Lanzhou 730050, China; 3.Farming Office of Yongchang County, Yongchang 737200, China |
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| Abstract: | The relationship between soil urease activity and soil fertility in the grazing grasslands of Yongchang county of Gansu province was studied from 2007 to 2008.There were significant differences in the urease activities of different grazing grasslands,and these activities were more intense in the surface layer than in the deeper layers.The soil urease activities showed significant positive correlations with organic matter content,total nitrogen,available nitrogen,and available potassium,but a significant neg... |
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| Keywords: | urease activity soil fertility path analysis grazing grassland |
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