| 放牧强度对荒漠草原地区土壤有机碳及全氮含量的影响 |
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| 引用本文： | 阿穆拉,赵萌莉,韩国栋,贾乐,董亭.放牧强度对荒漠草原地区土壤有机碳及全氮含量的影响[J].中国草地学报,2011,33(3). |
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| 作者姓名： | 阿穆拉 赵萌莉 韩国栋 贾乐 董亭 |
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| 作者单位： | 内蒙古农业大学生态环境学院,内蒙古,呼和浩特,010019 |
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| 摘 要： | 根据植被种类组成、植被盖度以及枯枝落叶的积累量在内蒙古四子王旗的短花针茅草原样地设4个退化梯度,分别为对照、轻度放牧、中度放牧和重度放牧,研究了不同放牧强度对土壤有机碳和全氮含量的影响.结果表明:2007年土壤有机碳和全氮含量分别介于25.32～27.02g/kg、1.40～1.47g/kg之间,2008年分别介于25.22～27.20g/kg、1.55～1.62g/kg之间,2009年分别介于25.44～27.51g/kg、1.64～1.71g/kg之间;土壤表层(0～20cm)的有机碳和全氮含量随着放牧强度的增大而逐渐降低,重度放牧区显著低于不放牧区、轻度放牧区和中度放牧区;土壤C/N比逐年降低,不同放牧区间差异不显著.
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| 关 键 词： | 荒漠草原 土壤碳氮含量 放牧强度 |
Influences of Grazing Intensity on Carbon and Nitrogen Contents in Desert Steppe |
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| Amula,ZHAO Meng-li,HAN Guo-dong,JIA Le,DONG Ting.Influences of Grazing Intensity on Carbon and Nitrogen Contents in Desert Steppe[J].Chinese Journal of Grassland,2011,33(3). |
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| Authors: | Amula ZHAO Meng-li HAN Guo-dong JIA Le DONG Ting |
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| Institution: | Amula,ZHAO Meng-li,HAN Guo-dong,JIA Le,DONG Ting(College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Hohhot 010019,China) |
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| Abstract: | An experiment was conducted at three sites(replicates) in Siziwang Banner in Inner Mongolia with four treatments: ungrazed(control),lightly grazed(LG),moderately grazed(MG) and heavily grazed(HG).The influences of grazing intensity on soil carbon and nitrogen contents in desert steppe were studied.The results indicated that the carbon and nitrogen contents varied from 25.32 to 27.02 g/kg and 1.55 to 1.62 g/kg in 2007,ranged from 25.22 to 27.20 g/kg and 1.55 to 1.62 g/kg in 2008 and ranged from 25.44 to 27.5... |
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| Keywords: | Desert steppe Soil carbon and nitrogen contents Grazing intensity |
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