内蒙古中北部球囊霉素相关土壤蛋白的分布及其环境影响

Glomalin-related Soil Protein Distribution and Its Environmental Affecting Factors in the Northeast Inner Mongolia

以内蒙古中北部半干旱区为研究区域,探讨球囊霉素相关土壤蛋白(GRSP)的分布,以及GRSP与土壤因子和气候因子之间的关系。研究发现:研究区土壤EE-GRSP(易提取GRSP)和T-GRSP(总GRSP)的平均含量分别为0.79 mg.g-1和1.44 mg.g-1,占有机碳平均值的6.83%和12.86%,且所占百分比均随有机碳的增加而降低。各地区之间GRSP含量差异显著,海拉尔地区显著高于锡林浩特地区。相关性分析表明,GRSP与有机碳、氮和C/N比呈显著正相关,与容重、pH和年平均气温呈显著负相关。另外,在半干旱区适当提高土壤黏粒含量可以增加GRSP的积累。建议通过接种AM(丛枝菌根)真菌来提高土壤中GRSP的含量,以改善土壤质量,增加土壤的有机碳库,这对脆弱区的生态修复具有重要的理论和实践意义。

The distribution of glomalin-related soil protein（GRSP） and the relationship between GRSP and environmental factors in a semiarid area in northeast Inner Mongolia were investigated in this study.The averages of EE-GRSP and T-GRSP contents were 0.79 mg·g-1 and 1.44 mg·g-1,accounting for 6.83% and 12.86% of average organic carbon contents,respectively,and their percentages were decreased with the increase of organic carbon content.The content of GRSP was different from different areas,for example,the GRSP of soil in Hailar area was significantly higher than that in Xilinhot area.The correlation analysis of GRSP indicates that there were the significant positive correlations between GRSP and carbon and nitrogen contents and C/N ratio,but the significant negative ones between unit weight,pH value and annual mean temperature.In addition,the GRSP accumulation could be increased by properly increasing soil clay content in semiarid area.It is suggested to increase the soil GRSP content by inoculating AM fungi so as to improve soil and increase soil organic carbon pool,which is of important theoretical and practical significance to regenerate the ecology and environment in fragile area.