贺兰山西坡不同类型草地土壤酶活性特征

干旱区研究 ›› 2012, Vol. 29 ›› Issue (5): 870-877.

贺兰山西坡不同类型草地土壤酶活性特征

秦燕^1,2, 牛得草¹, 康健¹, 曹格图³, 张斯莲⁴, 傅华¹

1. 草地农业生态系统国家重点实验室，兰州大学草地农业科技学院，甘肃兰州 730020； 
2. 齐齐哈尔大学，黑龙江齐齐哈尔 161006； 3. 内蒙古阿拉善盟草原总站，内蒙古巴彦浩特 750306；
4. 内蒙古阿拉善盟气象局，内蒙古巴彦浩特 750306

收稿日期:2011-03-14 修回日期:2012-05-29 出版日期:2012-09-15 发布日期:2012-10-09
通讯作者: 傅华. E-mail:fuhua@lzu.edu.cn
作者简介:秦燕（1981- ），女，黑龙江齐齐哈尔人，硕士，主要研究方向为草地生态.E-mail:mule119@163.com
基金资助:
中国科学院战略性先导科技专项“应对气候变化的碳收支认证及相关问题（XDA05050406-8）”；科技部科技支撑计划项目（2008BAD95B03）；国家自然科学基金项目（31070412）和兰州大学中央高校基本科研业务费专项资金（lzujbky-2012-98）资助

Characteristics of Soil Enzyme Activities in Different Grasslands in the Western Slope of the Helan Mountain, China

QIN Yan^1,2, NIU De-Cao¹, KANG Jian¹, CAO Ge-Tu³, ZHANG Si-Lian⁴, FU Hua¹

1. State Key Laboratory of Grassland Agroecosystems, College of Pastoral Agriculture Science and Technology, 
Lanzhou University, Lanzhou 730000, China;
2. Qiqihar University, Qiqihar 161006, Heilongjiang, China;
3. Alxa Alliance Grassland Station of Inner Mongolia, Bayan Hot 750306, Inner Mongolia, China;
4. Alxa League Meteorological Bureau of Inner Mongolia,Bayan Hot 750306,Inner Mongolia,China

Received:2011-03-14 Revised:2012-05-29 Online:2012-09-15 Published:2012-10-09

摘要/Abstract

摘要： 以阿拉善左旗境内贺兰山中段（西坡）山前地带的主要草地类型为对象，分析不同类型草地土壤酶活性的分布特征，及其与气候、植被和土壤等环境因子的关系。结果表明：① 随着海拔高度的降低，土壤脲酶、蔗糖酶、碱性磷酸酶和过氧化氢酶活性表现为：高山草甸＞山地草原＞山地荒漠草原＞草原化荒漠，且在0～10 cm土层的差异尤其显著；② 各类草地土壤酶活性均沿土壤垂直剖面依次降低，差异呈显著性水平；③ 偏相关及逐步回归分析表明，影响该区草地土壤脲酶和蔗糖酶活性最主要的因素为土壤微生物碳氮、有机碳和全氮，碱性磷酸酶主要受土壤微生物碳和全氮影响，对过氧化氢酶影响最大的因子为土壤微生物碳、pH、全氮和降水量。

关键词: 草地类型, 土壤酶, 海拔高度, 土壤微生物, 贺兰山, 阿拉善

Abstract: Soil enzymes are the specific biological catalysts for biochemical reaction in soil, and one of the indicators of evaluating soil health. This study was conducted at the grasslands in the western slope of the Helan Mountain and its piedmont in Alxa, Inner Mongolia, China. With measuring the distribution characteristics of soil enzyme activities, the relationships between soil enzyme activities and soil, vegetation and climatic factors were studied. The results are as follows: (1) Soil enzyme activities were decreased with the decrease of altitude and in an order of alpine meadow > mountain steppe > mountain desert steppe > steppe desert, and the difference was significant in topsoil (0-10 cm in depth); (2) Soil enzyme activities were decreased with the increase of soil depth; (3) According to the partial correlation and stepwise regression analysis, the main factors affecting the activities of soil urease and saccharase were soil microbial biomass carbon, soil organic carbon and total nitrogen, soil alkaline phosphatase activity was mainly affected by soil microbial biomass carbon and total nitrogen, and soil catalase activity was mainly affected by soil microbial biomass, total nitrogen, pH value and precipitation.

Key words: grasslands, soil enzyme activity, altitude, soil microbe, Helan Mountain, Alxa

秦燕, 牛得草, 康健, 曹格图, 张斯莲, 傅华. 贺兰山西坡不同类型草地土壤酶活性特征[J]. 干旱区研究, 2012, 29(5): 870-877.

QIN Yan, NIU De-Cao, KANG Jian, CAO Ge-Tu, ZHANG Si-Lian, FU Hua. Characteristics of Soil Enzyme Activities in Different Grasslands in the Western Slope of the Helan Mountain, China[J]. , 2012, 29(5): 870-877.

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