生态环境学报2026，Vol.35Issue(8)：1176-1186,11.DOI:10.16258/j.cnki.1674-5906.2026.08.002
引黄灌区不同种稻年限苏打盐碱土碳组分垂直分布特征及其驱动因素
Vertical Distribution of Carbon Components in Soda-Saline-Alkaline Soils under Different Rice Cultivation Durations in Yellow River Irrigation Districts and Their Driving Factors
摘要
Abstract
[Objective]Rice cultivation is an effective biological approach for ameliorating soda-saline-alkaline soils.Investigating how the duration of rice cultivation affects soil organic carbon content and its vertical distribution is crucial for elucidating the mechanisms underlying soil amelioration and improving the theoretical basis for saline-alkali soil management.[Methods]This study investigated soda-saline-alkaline soils in a Yellow River irrigation district.Soil samples were collected from fields cultivated with rice for 1,2,5,8,and 20 years.Changes in soil organic carbon,soil inorganic carbon,and total carbon contents were analyzed across different soil depths and cultivation durations.[Results]Soil organic carbon accumulated to varying degrees in all soil layers as the duration of rice cultivation increased,with higher concentrations in the topsoil(0-20 cm),thereby increasing the overall soil organic content.After 20 years of rice cultivation,soil inorganic carbon content reached 1.26 g·kg-1 in the 0-20 cm layer,1.32 g·kg-1 in the 20-40 cm layer,and 1.79 g·kg-1 in the 40-60 cm layer.Total soil carbon content increased significantly after long-term cultivation,whereas the total carbon content in the deep soil layer(40-60 cm)became relatively stable after peaking during the intermediate cultivation period.Pearson correlation analysis revealed a significant positive correlation between soil organic carbon and total soil carbon(p＜0.05),whereas soil organic carbon was negatively correlated with soil inorganic carbon.Redundancy analysis and Mantel tests indicated that available potassium,electrical conductivity(EC),and pH were the primary environmental factors driving variation in soil carbon components.Soil depth was the key factor influencing both soil organic carbon and soil inorganic carbon,and both components were strongly associated with environmental factors(r＞0.5).[Conclusion]Long-term rice cultivation significantly enhances organic carbon sequestration in soda-saline-alkaline soils.This sequestration effect exhibits distinct surface accumulation and vertical differentiation,providing a scientific basis for evaluating soil fertility in saline-alkali paddy ecosystems.关键词
盐碱土/种稻年限/土壤有机碳/土壤无机碳Key words
saline-alkali soil/rice cultivation duration/soil organic carbon/soil inorganic carbon分类
农业科技引用本文复制引用
齐儒春,王静,马林熠,马飞,刘吉利..引黄灌区不同种稻年限苏打盐碱土碳组分垂直分布特征及其驱动因素[J].生态环境学报,2026,35(8):1176-1186,11.基金项目
宁夏回族自治区自然基金项目(2025AAC030180) （2025AAC030180）
国家重点研发计划项目(2021YFD1900603-04) （2021YFD1900603-04）
