青岛崂山茶园土壤微量元素有效量及其影响因素研究

Available Contents of Trace Element and Factors Influencing their Availability in Qingdao Laoshan Tea Garden Soils

青岛市崂山茶种植区土壤调查研究表明,茶园土壤中6种主要微量元素(Zn、Cu、B、Mn、Fe、Mo)的有效量多大于其缺素临界值,有效态铜、锌、锰含量均处于高水平,钼中等,硼较低。统计分析表明,土壤中Zn、B、Mn等元素全量与有效量间具显著正相关性,Fe呈显著负相关性,说明全量并不是有效量的完全控制因素;pH值与有效态Zn、Cu、B、Fe和Mo均有一定的负相关关系,表明土壤酸性增强(酸化)会增加这类元素的生物有效性;有机质含量与有效态Zn、Cu、B、Fe和Mo呈正相关性,说明有机质较高有利于土壤元素活化。

Based on the investigation of Qingdao Laoshan tea garden soils, the available contents of the major trace elements （Zn, Cu, B, Mn, Fe and Mo） were greater than their critical value. The available contents of Zn, Cu and Mn were in high level and Mo was in medium, whereas B was in low level. Statistical results indicated that total concentration of soil Zn, Cu and Mn had positive correlation with that of available contents,while Fe had obviously negative correlation. The finding suggested that the available content of soil trace elements was not completely controlled by its total content. Negative correlation was found between pH and available Zn, Cu, B, Fe, and Mo, so the activities of these elements may be increased in acidic soils, while organic matter played a positive role in improving the availabilities of Zn, Cu, B, Fe and Mo.