农学学报2024，Vol.14Issue(4)：37-41,5.
浙江省典型农田土壤酸化关键pH段的酸缓冲性能及影响因素研究
Study on Acid Buffering Performance and Influencing Factors of Key pH Stage of Soil Acidification in Typical Farmland of Zhejiang Province
摘要
Abstract
The development from neutral(pH 6.5-7.5)to acidic(pH 4.5-5.5)is the key stage of soil acidification,so the buffering capacity of soil to acid in the range of pH 4.5-6.5 will directly affect the rate of soil acidification.In the study,48 representative paddy soil samples were collected from plain areas of Zhejiang Province,and the acid buffering performance and its main influencing factors of the soils in the key pH stage of acidification were characterized.The results showed that the acid buffer capacity of the paddy soils,the amount of acid needed to reduce the pH value by one unit,ranged from 8.34-41.22 mmol/(kg·pH),with an average of 23.38 mmol/(kg·pH).The capacity decreased in the order of soils in river-net plain＞soils in coastal plain＞soils in river valley plain.The acid buffer capacity of the paddy soils in the river-net plain and coastal plain was 1.60 and 1.17 times of that in river valley plain,respectively.Correlation analysis showed that soil clay content and CEC were the main factors affecting soil acid buffer capacity,and the lack of clay content was the main inducement of soil rapid acidification in the plain area.Low-clay soil is the focus of farmland acidification prevention in the plain area.关键词
水稻土/酸化/酸缓冲容量/粘粒Key words
paddy soil/acidification/acid buffer capacity/clay分类
农业科技引用本文复制引用
童文彬,李荣会,杨海峻,江建锋,祝伟东,吴怡菲,章明奎..浙江省典型农田土壤酸化关键pH段的酸缓冲性能及影响因素研究[J].农学学报,2024,14(4):37-41,5.基金项目
国家自然科学基金面上项目"长期全年淹水集约种植对水耕人为土性态演变和物质循环及生态功能的影响"(41977001). （41977001）
