贵州省剑河土壤有效态微量元素含量及评价

对剑河县12乡镇102个土样本的有效态微量元素进行了测定,研究了土壤中有效锌、有效铜、有效锰、有效铁、有效硼元素在剑河每个乡镇中的分布及含量,研究结果表明,有效硼的含量平均为0.50 mg/kg,有效锌平均为2.24 mg/kg,有效铜平均为2.23 mg/kg,有效铁平均为142.06 mg/kg,有效锰平均为73.84 mg/kg.有效铁、有效锰含量属于高等级.有效铜含量与有效锌、有效铁、有效锰含量间均达到显著的相关关系,有效锌含量与有效铁、有效锰含量间均达到极显著相关关系,有效锰含量与有效铁间达到极显著相关关系,有效硼与其他元素间均不相关.在农业生产过程中,针对不同乡镇的土壤微量元素状况,应在长期施用氮磷钾肥料的基础上,因地制宜地增施相应硼肥,减少铁肥、锰肥的施用.

Evaluation of Available Form of Some Microelements in Soils from Jianhe of Guizhou Province

Available forms of microelements in 102 soil samples collected from 12 towns in Jianhe County were measured to study content and distribution of available Zn, Cu, Mn, Fe and B in each town in Jianhe. The results showed that the average contents of available B, Zn, Cu, Fe and Mn was 0. 50 g/kg, 2. 24 mg/kg, 2.23 mg/kg, 142. 06 mg/kg and 73.84 mg/kg, respectively. Both levels of available Fe and available Mn were high. Content of available copper had significant correlations with contents of available Zn, Fe and Mn. Content of available zinc had strong significant correlations with contents of available Fe and Mn. Mn had a strong significant correlation with content of available iron. There were no correlation between content of available boron and other elements. Microelement fertilizers should be applied according to the microelements status in the local soils. After long - term application of NPK fertilizers, additional supply of B fertilizer is required. Application of iron and manganese fertilizer should be reduced.