内蒙古自治区土壤有机碳、氮蓄积量的空间特征

摘要/Abstract

摘要： 采用全国第二次土壤普查中内蒙古自治区的典型土种剖面资料,在剖面深度的基础上,用地统计学和地理信息系统(GIS)方法,分别按土壤类型和土地覆被类型计算了土壤有机碳、氮密度,分析了内蒙古自治区土壤有机碳、氮蓄积量的空间分布特征,探讨了土壤有机碳、氮蓄积量与主要气候要素的关系.结果表明,内蒙古自治区土壤有机碳密度处于3.24～43.24kg·m^-3之间,土壤有机氮密度处于269.56～3085.60g·m^-3之间,土壤碳、氮比(C/N)大致在4.46～17.13之间.土壤有机碳、氮密度与温度呈负相关,相关系数分别为0.557和0.460(n=245);与年均降水量呈正相关,但相关性不是很强,相关系数分别为0.285和0.203.从内蒙古自治区东北地区到西南地区,土壤有机碳、氮蓄积量随着温度递升和降水量递减呈现降低的趋势.

关键词: 土壤碳氮循环, 碳密度, 氮密度, 碳氮比, 番茄灰霉菌, 链霉菌, 生物防治, 抑菌活性

Abstract: Studies on the amount and spatial distribution of soil organic carbon/nitrogen in Inner Mongolia and their relationship to main climate factors showed that the content of soil organic carbon and nitrogen was 3.24～43.24 kg·m^-3 and 269.56～3085.60 g·m^-3,respectively, and the C/N ratio was about 4.46～17.13. The correlation between soil organic carbon/nitrogen and temperature was negative, and R was 0.557 and 0.460,respectively.Soil organic carbon/nitrogen had a weak positive correlation to precipitation, and Rwas 0.285 and 0.203. Soil organic carbon and nitrogen appeared a reducing trend with increasing temperature and decreasing precipitation from northeast to southwest.

Key words: Soil carbon/nitrogen cycle, Carbon density, Nitrogen cycle, C/N ratio, inhibitory activity, bio-control., Botrytis cinerea, Streptomyces chungwhensis

中图分类号:

P467
S159.2

陈庆美, 王绍强, 于贵瑞. 内蒙古自治区土壤有机碳、氮蓄积量的空间特征[J]. 应用生态学报, 2003, (5): 699-704.

CHEN Qingmei, WANG Shaoqiang, YU Guirui. Spatial characteristics of soil organic carbon and nitrogen in Inner Mongolia[J]. Chinese Journal of Applied Ecology, 2003, (5): 699-704.

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