安徽池州地区富锌土壤资源分布特征及成因分析

Analysis on Distribution Characteristics and Causes of Zinc-rich Soil Resources in Chizhou of Anhui Province

利用多目标地球化学调查和池州市富硒土壤资源地球化学调查资料,对该地区富锌土壤资源分布及来源成因进行研究。结果表明,池州地区表层土壤锌含量平均值93.6 mg/kg,达到富锌标准的土壤面积为4 251km^(2),占该地区总面积的50.61%。该地区的富锌土壤主要分布于石台县、贵池区、酉华—青阳县—童埠—丁桥等地,地域分布明显受成土母质、土壤类型、pH、海拔的影响。土壤锌含量受土壤类型和土壤母质共同影响,尤其红壤、紫色土,碳酸盐岩(128.8 mg/kg)与红色碎屑岩(69.1 mg/kg)发育的红壤锌含量相差近2倍;强酸或者强碱均会降低土壤锌的活性;随着海拔的升高,土壤锌含量随之增加。

Using the multi-objective geochemical survey and the geochemical survey data of selenium-rich soil resources in Chizhou City, the distribution and origin of zinc-rich soil resources in this area were studied.The results showed that the average zinc content of topsoil in Chizhou area was 93.6 mg/kg, and the soil area that reached the zinc-rich standard was 4 251 km^(2), accounting for 50.61% of the total area of the area.The zinc-rich soils in this area were mainly distributed in Shitai County, Guichi District, Youhua-Qingyang County-Tongbu-Dingqiao and other places, and the geographical distribution was obviously affected by the parent material, soil type, pH and altitude.Soil zinc content was affected by both soil type and parent material, especially red soil and purple soil, the difference of zinc content in red soils developed from carbonate rocks(128.8 mg/kg) and red clastic rocks(69.1 mg/kg) was nearly 2 times.Strong acid or strong alkali could reduce the activity of zinc in soil.The zinc content in soil increased with the increase of altitude.