龙海市北部土地质量地球化学评估肥力指标特征研究

Characterization of soil fertility based on geochemical indices derived from land quality investigation in the northern part of Longhai city

利用龙海市土地质量地球化学评估成果,建立基于元素地球化学的土壤肥力指标,探讨土地质量地球化学评估肥力指标含量的分布特征及其相关性,并对肥力指标进行分级,进而总结龙海市土壤肥力特征。评价结果表明调查区土壤有机质、氮、磷含量稍缺乏,钾、铜含量适中,土壤营养元素和不同地块分布很不均匀,需要根据土壤实际地球化学特征进行平衡施肥,防止养分投入不足或过量而引起的土壤质量退化,以有效保护耕地地力。

A composited soil fertility indices was identified to assessment geochemical land quality based on the abundance of nutrient elements in topsoil, which derived from a regional geo- chemical exploration in Longhai city, Fujian province, and then the statistic properties of el- ement abundant distribution and fertility indices correlation were analyzed, as well as the level of fertility indices was subsequently classified, and then the quality of land was assessed in this study, which conclude that the abundance of soil organic, nitrogen, phosphorus was inclined to deficient, whereas the abundance of soil organic, nitrogen, phosphorus was ap- propriate underlying a heterogeneous background of nutrient element distribution, which in- dicated the essential of application fertilization balance to improve soil fertility in respect of soil quality assessment in this study.