Calcium lactate as a soil amendment: Mechanistic insights into its effect on salinity, alkalinity, and aggregation in saline-alkaline soils

作     者：Fan, Jingbiao Lv, Qilin Zhou, Tairan Wang, Tianhao Gao, Haixiang Zhou, Wenfeng Ren, Xueqin Hu, Shuwen 

作者机构：China Agr Univ Coll Resources & Environm Sci 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China China Agr Univ Coll Sci 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China China Agr Univ Coll Resources & Environm Sci China Beijing Key Lab Farmland Soil Pollut Prevent 2 Yuanmingyuan West Rd Beijing 100193 Peoples R China 

出 版 物：《SOIL & TILLAGE RESEARCH》 (Soil Tillage Res.)

年 卷 期：2025年第248卷

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 

基　　金：Ministry of Agriculture and Rural Affairs of the People's Republic of China [NK2022180401  NK2022180404] 

主　　题：Soil colloid Calcium lactate Soil amendment Saline-alkali soils Aggregation 

摘      要：Soil salinization is a problem that threatens agricultural productivity and food security. It occurs when soluble salts, sodium (Na+) and carbonate (CO32-) ions accumulate excessively in the soil. In this study we thoroughly investigate the potential of using calcium lactate (CL) as a soil amendment to mitigate the effects caused by soil salinization. We comprehensively analyze how CL affects soil parameters such, as salinity, colloid morphology and physicochemical properties. Our hypotheses are that CL can effectively counterbalance the adverse soil pH and high salinity conditions in the soil. This happens because CL reacts with free CO 3 2- ions through an acid base neutralization reaction, which helps reduce the alkalinity of the soil. Moreover, this alteration enhances the ion exchange process between calcium (Ca2+) and sodium ions (Na+), resulting in the substitution of Ca2+ ions for Na+ ions attached to the soil particle surfaces. As a result, there is a decrease in the percentage of sodium leading to an improvement in saline soil conditions. Moreover, CL supports the formation of more stable soil aggregates, by bridging and hydrogen bonding processes thereby enhancing soil structure. Furthermore, it promotes the creation of organic mineral composites. Increases storage of carbon in the soil ultimately improving its fertility. When we compare CL to inorganic calcium salts such as CaCl2 and gypsum it becomes apparent that CL is more environmentally friendly, safe and effective, as a soil amendment. Its main purpose is to mitigate soil salinity and improve soil quality.