草地学报

草地学报 ›› 2017, Vol. 25 ›› Issue (2): 310-314.DOI: 10.11733/j.issn.1007-0435.2017.02.013

• 研究论文 • 上一篇    下一篇

科尔沁沙地苜蓿草地土壤酶活性的时空变化特征

石立媛1, 张永亮1, 高凯1, 吴明浩1, 邓波2, 王显国2   

  1. 1. 内蒙古民族大学农学院, 内蒙古 通辽 028042;
    2. 中国农业大学, 北京 100193
  • 出版日期:2017-04-15 发布日期:2017-06-25
  • 通讯作者: 张永亮,E-mail:zyl8802@163.com
  • 作者简介:石立媛(1992-),女,呼伦贝尔市人,硕士研究生,研究方向为牧草栽培,E-mail:894644996@qq.com
  • 基金资助:

    内蒙古自然科学基金项目（2015MS0337）；内蒙古自治区社会发展领域科技计划项目（201502104）；重点牧区草原"生产生态生活"配套保障技术集成与示范（2012BAD13B00）资助

Study on the Temporal and Spatial Variation Characteristics of Soil Enzyme Activities in Alfalfa Field with Different Growing Years in Horqin Sandland

SHI Li-yuan1, ZHANG Yong-liang1, GAO Kai1, WU Ming-hao1, DENG Bo2, WANG Xian-guo2   

  1. 1. College of Agronomy, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China;
    2. China Agricultural University, Beijing 100193, China
  • Online:2017-04-15 Published:2017-06-25

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摘要：

在科尔沁沙地大田试验条件下，研究了不同种植年限（1~5 a）苜蓿草地土壤脲酶和过氧化氢酶活性的时（年限）空（土层）变化特征，旨在探讨种植不同年限苜蓿对土壤生物化学性状的影响，为沙地苜蓿草地管理提供科学依据。结果表明：2种土壤酶活性都随着土层加深而降低，0~20 cm 土层，土壤酶活性最强，呈现出表聚性。随着种植年限增加，2种土壤酶活性都呈先增后降趋势。在0~70 cm土层，土壤过氧化氢酶活性大小顺序为：2 a > 5 a > 4 a > 1 a > 3 a；土壤脲酶活性大小顺序为：2 a > 5 a > 3 a > 4 a > 1 a > 原生植被地。2年龄苜蓿草地根际土过氧化氢酶活性显著高于1年龄和3~5年龄（P<0.05）；2年龄和4~5年龄苜蓿草地非根际土过氧化氢酶活性显著高于1年龄和3年龄（P<0.05）。不同种植年限苜蓿草地根际土过氧化氢酶活性均高于非根际土，其中，种植第1年至第3年土壤酶活性差异显著（P<0.05）。

关键词: 紫花苜蓿地, 种植年限, 土壤酶活性, 土层深度, 科尔沁沙地

Abstract:

A field experiment was conducted to study the seasonal variations of soil enzyme (urease and catalase) activities in alfalfa field with different growing years (1~5 years) in Horqin sandland, and the objective was to provide a theoretical basis for the alfalfa field management. Results indicated that the two kinds of soil enzyme activities decreased significantly with the increase in soil depth,the most active in the 0~20 cm depth, and showed the surface gathering vertical distribution characters. the two kinds of soil enzyme activities increased at first and then decreased with the increase of growing years. In the 0~70 cm depth, the catalase-enzyme activity was 2 a > 5 a > 4 a > 1 a > 3 a and urea-enzyme activity was 2 a > 5 a > 3 a > 4 a > 1 a> CK(primary vegetation land). The catalase-enzyme activity of rhizosphere soil in 2-year-old alfalfa field was much higher than that in 1-year-old and 3~5 year-old alfalfa fields(P<0.05). The catalase-enzyme activity of non-rhizosphere soil in 2-year-old and 4~5 year-old alfalfa fields was much higher than that in 1-year-old and 3 year-old alfalfa field (P<0.05). The catalase-enzyme activity of rhizosphere soil was much higher than that of non-rhizosphere soil in different growing years, and showed significant difference between rhizosphere soil and non-rhizosphere soil from first year to third year of alfalfa growth.

Key words: Alfalfa, Growing years, Soil enzyme activity, Soil depth, Horqin sandy land

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