鲁中南丘陵区与华北平原过渡地带土壤pH值演变特征及调控——以曲阜市为例
Soil pH Value Evolution Characteristics and Regulation in the Transitional Area between Hilly Area of Central-South Shandong Province and North China Plain—Taking Qufu City as an Example

明确土壤pH值在鲁中南山地丘陵区向华北平原过渡带典型区域的演变特征，对精准制定耕地质量提升及科学施肥技术策略具有重要指导意义。本文以山东省曲阜市为例，研究了其土壤pH值分布现状及演变特征。结果表明：1) 2020年全市土壤pH平均值6.63，pH值变幅在4.38~8.54之间，已出现中强酸性、强酸性和碱性土壤；2) 自第二次土壤普查以来，全市耕地(6.5, 7.5]中性区间土壤占比锐减，由95.00%降低至36.62%，偏酸性和偏碱性土壤占比均大幅增加，pH值两极分化趋势明显；3) 对全市12个镇(街)的pH值不同区间分布占比进行聚类分析为三类，并针对性提出耕地质量提升及科学施肥调控技术措施。
In order to improve the cultivated land quality and to provide scientific basis for fertilization technique, the evolution characteristics of soil pH value in the transitional area between hilly area of Central-South Shandong Province and North China Plain were studied. Utilizing Qufu’s soil pH value as an example, the distribution status and evolution characteristics were analyzed. The re-sults showed that: 1) The citywide pH value average was 6.63 in 2020, the changing range was about 4.38 to 8.54, medium-strong acidic, strongly acidic and alkaline soil appeared; 2) Proportion of (6.5, 7.5] neutral interval showed a rapid decrease from 95.00% to 36.62% since the Second Na-tional Soil Survey, and the proportion of acidic and alkaline soil increased greatly, which showed an obvious two-polarization tendency; 3) The proportion of different intervals distribution of 12 towns were classified into three major groups by cluster analysis, and proposed several pieces of pertinence suggestion on the cultivated improvement and fertilization technique technology.