Characteristics of Soil Salinization and Ion Correlation Mechanism of Protected Cucumber

YU Suhua; SHI Huaichao; LIU Lin; GAO Yanyan; GUO Faming; WANG Peng

doi:10.19590/j.cnki.1008-1038.2026.07.012

Abstract：To clarify the characteristics of soil secondary salinization and ion correlation mechanism under different cultivation modes in Yinan,and provide scientific support for precise prevention and control of salinization and optimization of cultivation modes,two mainstream modes,namely arch shed(spring early-maturing+autumn delayed cultivation)and warm shed(overwintering cultivation),were taken as the research objects.A combination of field sampling,indoor testing and statistical analysis was used to systematically study the grading characteristics of soil salinization,salt content,ion composition and their correlations.The results showed that the soil salinization of protected cucumber in Yinan was generally at a mild level,dominated by non-salinization(32.1％)and mild salinization(45.0％),while 9.3％of the soil was severely salinized and required key prevention and control.The degree of salinization and spatial heterogeneity in warm sheds were higher than those in arch sheds,but there was no significant difference in the average salt content between the two modes.The soil salt ions in both modes showed typical NO3--Ca2+composite characteristics,with NO3-as the dominant anion and Ca2+as the dominant cation.There was a synergistic enrichment characteristic between Ca2+and Mg2+,and the correlation between ions in arch sheds was stronger than that in warm sheds.This study clarifies the differences in salinization and key driving mechanisms under different cultivation modes,and provided theoretical and technical support for soil health management and precise prevention and control of salinization in protected cucumber fields.