宣州区土壤酸碱度地球化学特征及土壤改良建议  

GEOCHEMICAL CHARACTERISTICS OF SOIL ACIDITY AND ALKALINITY AND SUGGESTIONS FOR SOIL IMPROVEMENT IN XUANZHOU DISTRICT

作　　者：刘正盛 LIU Zhengsheng(No.311 Geological Team,Bureau of Geology and Mineral Exploration of Anhui Province,Anqing 246003,Anhui,China)

机构地区：[1]安徽省地质矿产勘查局311地质队,安徽安庆246003

出　　处：《资源信息与工程》2025年第2期99-102,共4页Resource Information and Engineering

摘　　要：为了给宣州区土壤改良提供建议,以宣州区土壤为研究对象,采用四分法测定土壤pH值,并进行数据分布检验和参数计算,确定该区土壤中酸碱程度及其空间分布特征,划分地球化学等级。结果表明,全区土壤中p H值范围2.50~8.90,以酸性土壤为主,其次为强酸性土壤,中性、碱性土壤分布较少;全区酸性土壤空间分布与碎屑岩风化物母质区一致,受成土母质制约明显;北部水阳镇全镇范围土壤呈碱性,狸桥、水东、周王、新田、溪口等乡镇少部分区域也分布有碱性土壤。对区内过酸性土壤建议施石灰0.03~0.04 kg/m^(2),并施足农用肥料,还可施用40~50 kg植物灰渣,中和土壤酸性,调理土壤肥力;对区内过碱性土壤建议利用石膏粉(150目)∶硫磺粉(150目)∶硫酸亚铁(100目)∶硼镁肥(100目)∶腐殖酸(100目)=8∶5∶2∶2∶3进行改良。In order to provide suggestions for soil improvement in Xuanzhou District,taking the soil of Xuanzhou District as the research object,the soil pH was determined by the quadratic method,and the data distribution test and parameter calculation were carried out,to determine the degree of acidity and alkalinity and its spatial distribution characteristics in the soil of the district,and to classify the geochemical grade.The results show that the pH value in the soil of the region ranges from 2.50 to 8.90,with acidic soil dominating,followed by strongly acidic soil,and neutral and alkaline soil distributed less.The spatial distribution of acidic soil in the region is consistent with the parent material area of the weathered materials of the clastic rocks,and it is obviously constrained by the soil parent material.The soil of Shuiyang Town in the northern part of Xuanshou District is alkaline,and alkaline soil is also distributed in a few areas of townships,such as Liqiao,Shuidong,Zhouwang,Xintian,and Xikou Town.For the over-acidic soil in the area,it is recommended to apply lime at a density of 0.03-0.04 kg/m^(2),and apply enough agricultural fertilizers,and also apply 40-50 kg of plant ash to neutralize the soil acidity and regulate the soil fertility.For the over-alkaline soil in the area,it is recommended to apply gypsum powder(150 mesh)∶sulphur powder(150 mesh)∶ferrous sulphate(100 mesh)∶boron and magnesium fertilizer(100 mesh)∶humic acid(100 mesh)=8∶5∶2∶2∶3 for improvement.

关 键 词：土壤酸碱度 地球化学 地球化学等级 土壤改良 宣州区 

分 类 号：S156[农业科学—土壤学]