吉林省中部黑土区土壤微量元素分布及空间变异特征研究

[目的]为了找出吉林省中部黑土中微量元素的分布及空间变异规律,从而为黑土资源的合理利用、黑土退化提供部分理论依据。[方法]对吉林省中部黑土区进行定点采样,对大批量样品进行室内分析。[结果]与休闲黑土及第2次土壤普查进行对比,土壤中有效态微量营养元素分布产生变化且各地区之间存在差异。有效铁、有效锌、有效锰含量呈现中间地区低、南北两侧地区高的趋势;有效铜含量从南到北呈现降低的趋势。3个地区土壤中有效态微量营养元素含量均低于公主岭休闲黑土,土壤中微量元素有减少趋势。吉林省中部黑土中微量元素空间上存在差异,不同元素空间变化规律不同。[结论]适当增加3个地区锌、铜的投入,为吉林省中部增产增收提供保障。

Study on Distribution and Spatial Variation Patterns of Trace Elements in Black Soil of Central Jilin Province

[Objective] To find out the distribution and spatial variation patterns of trace elements in the black soil of Central Jilin Province,thus to provide theoretical basis for the rational utilization and degradation of black soil resources.[Method] The black soil was collected from Central Jilin Province to be analyzed in the laboratory.[Result] Compared with leisure black soil and the second time black soil census,the distribution of soil available micronutrients changed and varied in different regions.The contents of effective iron,zinc,and manganese were low in the middle area and high in the south and north.The content of effective copper showed a decreasing trend from south to north.The content of available micronutrients was lower in the black soil of all the three areas than in the leisure black soil of Gongzhuling,showing a decreasing tendency.The distribution of microelements in the black soil of Central Jilin Province showed a spatial variation,different elements had different variation laws.[Conclusion]The appropriate application of zinc and copper can provide guarantee for the yield and income increase in Central Jilin Province.