锡林郭勒草原土壤主要营养成分的空间分布  

Spatial distribution of major nutrients in Xilin Gol Grassland

作　　者：贺俊杰[1] 

机构地区：[1]锡林浩特国家气候观象台,内蒙古锡林浩特026000

出　　处：《草业科学》2013年第11期1710-1717,共8页Pratacultural Science

基　　金：锡林郭勒盟气象局服务型业务自选项目(201302)

摘　　要：利用主成分原理、变异系数等数理统计方法,对2005-2012年土壤主要营养成分资料进行分析和综合评价。结果表明,锡林郭勒草原土壤主要养分全氮、全磷、全钾、有机质含量分别为0.982、0.348、22.343和23.024g·kg-1;土壤养分现状:全氮含量缺乏、全钾含量丰富、有机质含量中等、全磷含量很缺乏。其中,草甸草原土壤全钾和有机质含量丰富、全氮含量中等、全磷含量很缺乏;典型草原土壤全钾含量丰富、全氮和有机质含量中等、全磷含量很缺乏;荒漠化草原土壤全钾含量丰富、有机质含量缺乏、全氮和全磷含量很缺乏。土壤变异性:有机质、全氮、全磷和全钾依次减弱,变异系数分别为39.4%、35.2%、24.3%和12.5%。锡林郭勒草原土壤综合养分排名依次为草甸草原>典型草原>荒漠化草原。其中,锡林浩特市天然草地土壤综合营养成分最高,二连浩特市最低,其余旗(县、市)处于两者之间。上述结论可为草原资源合理应用和生态系统的有效保护及恢复提供依据。With the statistical methods of main ingredients principle and coefficient of variation, major soil nutrients of Xilin Gol Grassland during the period of 2005 to 2012 were analyzed and comprehensive evaluated, in statistical methods of main ingredients principle and coefficient of variation. The results showed that, the content of total nitrogen, total phosphorus, total potassium and organic matter were 0. 982, 0. 348, 22. 343 and 23. 024 g · kg^-1 in Xilin Gol Grassland. The soil nutrient condition was as follows： Content of total nitrogen and total potassium are abundant; Content of organic matter is medium; And Content of total phosphorus is lacking. Meadow steppe soil is high total potassium and organic matter content, medium in total nitrogen content, and extremely low in total phosphorus content. Typical grassland soil is high in total potassium content, medium in total nitrogen and organic matter content, and low in total phosphorus content. Desertification grassland soil is high in total potassium content, low in organic matter content, and extremely low in total nitrogen and total phosphorus content. Soil variability is organic matter,total nitrogen 〉 total phosphorus 〉 total potassium, and their coefficients of variation were 39.4%, 35.2%, 24. 3% and 12. 5%, respectively. The order of integrated soil nutrients for Xilin Gol Grassland is meadow grassland, typical grassland and desert grassland, from high to low. The highest integrated soil nutrients were observed in Xilinhot Grassland, and the lowest one were observed in Erenhot Grassland. Others remain in between of these two. The results can provide basis support for a reasonable application of grassland resources and effective protection and recovery of ecosystem.

关 键 词：全氮 全磷 全钾 有机质 

分 类 号：S812.2[农业科学—草业科学]