| 草甸草原不同放牧强度对土壤有机碳含量的影响 |
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| 引用本文： | 王明君,韩国栋,赵萌莉,陈海军,王珍,郝晓莉,薄涛.草甸草原不同放牧强度对土壤有机碳含量的影响[J].草业科学,2007,24(10):6-10. |
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| 作者姓名： | 王明君 韩国栋 赵萌莉 陈海军 王珍 郝晓莉 薄涛 |
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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;内蒙古农业大学生态环境学院,内蒙古,呼和浩特,010019;内蒙古农业大学国际教育学院,内蒙古,呼和浩特,010019 |
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| 基金项目： | 内蒙古科技攻关项目，教育部"青年教师教学科研奖励计划"科学科研奖励项目，国家自然科学基金，国家科技攻关计划 |
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| 摘 要： | 对草甸草原土壤有机碳(SOC)、全氮(TN)和机械组成的研究结果表明,土壤表层(0～20 cm)的有机碳和全氮在轻度放牧和中度放牧的情况下没有显著差异,但都显著高于重度放牧的草地.草地植被则表现为:轻度放牧显著高于中度放牧,中度放牧显著高于重度放牧草地.因此,中度放牧草地是草地退化的警戒阈,应当引起关注.在土壤表层(0～20 cm),SOC和TN有显著地线性相关关系,两者与土壤机械组成没有显著的线性相关关系.
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| 关 键 词： | 草甸草原 土壤有机碳 土壤全氮 机械组成 警戒阈 |
| 文章编号： | 1001-0629（2007）10-0006-05 |
| 收稿时间： | 2006-09-02 |
| 修稿时间： | 2006-09-02 |
The effects of different grazing intensity on soil organic carbon content in meadow steppe |
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| WANG Ming-jun,HAN Guo-dong,ZHAO Meng-li,CHEN Hai-jun,WANG Zhen,HAO Xiao-li,BO Tao.The effects of different grazing intensity on soil organic carbon content in meadow steppe[J].Pratacultural Science,2007,24(10):6-10. |
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| Authors: | WANG Ming-jun HAN Guo-dong ZHAO Meng-li CHEN Hai-jun WANG Zhen HAO Xiao-li BO Tao |
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| Institution: | 1. College of Ecology and Environment Science, Inner Mongolia Agricultural University; 2. College of International Education, Inner Mongolia Agricultural University, Hohhot, 010019,China |
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| Abstract: | Soil organic carbon(SOC),total nitrogen(TN) and mechanical composition Meadow steppe soil were studied,which showed that SOC and TN of surface soil(0-20 cm)had no significant difference under light and moderate grazing,but significantly higher than that on heavy grazed land.The grassland vegetation coverage was higher under light grazing compared to moderate and heavy grazing.So moderately grazed grassland was the threshold and should be addressed.SOC of surface soil(0-20 cm)linearly correlated to TN but they had no significant linear correlation to mechanical composition. |
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| Keywords: | meadow steppe soil organic carbon total nitrogen mechanical composition threshold |
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