济南市历城区典型土壤类型N、P、K养分元素的有效态分布特征

Distribution Characteristics of Available N,P and K Nutrients in Typical Soil Types in Licheng District of Jinan City

本文选择济南市历城区典型土壤中N、P、K 3种养分元素进行化学测试分析,对该地区的浅层土壤元素有效态地球化学背景值及在不同类型土壤中的分布特征进行研究。研究结果表明:该地区土壤质量较好,元素有效量与全量总体排序一致,不同元素的有效度相差十分悬殊。5种土壤类型的元素有效度具有一定差异性,潮褐土、潮土中N、P、K元素的有效量和有效度都明显高于其他土壤类型,褐土性土中N全量最高,但有效度反而最低;棕壤性土中K全量、有效量、有效度均最低。通过对全量、pH及有机质含量的影响分析,发现有机质含量、全量是不同土壤类型中元素有效度差异性的重要原因,而pH的影响较小。

In this paper,chemical test and analysis of three typical nutrient elements,N,P and K in typical soil in Licheng district of Ji'nan city are selected.The geochemical background values of available elements in shallow soil and their distribution characteristics in different types of soil are studied.It is showed that the soil quality in this area is good,the available content of elements is consistent with the overall order of the total content,and the availability of different elements is very different.The element availability of five soil types is different.The available contents of N,P,K and availability in meadow cinnamon soil and cinnamon soi are obviously higher than other soil types.The content of N is the highest in cinnamon soil,but the availability is the lowest.Total K,available K and the availability of brown soil are the lowest.Through analysis on the influence of the total quantity,pH value and organic matter content,it is found that the content and total quantity of the organic matter are important reasons for the differences of element availability in different soil types,but the influence of pH value is little.