烟草科技2026，Vol.59Issue(6)：23-33,11.DOI:10.16135/j.issn1002-0861.2025.0564
云南烟田耕层土壤有机碳空间分布特征及影响因素分析
Spatial distribution and influencing factors of organic carbon in topsoil of tobacco fields in Yunnan Province
摘要
Abstract
To enhance the role of soil organic carbon in addressing climate change and regulating soil fertility,physical and chemical properties of topsoil(0-30 cm)from 14 501 sampling points in Yunnan tobacco fields in 2018 were surveyed.Organic carbon contents,organic carbon density,and carbon stock in topsoil from counties,major tobacco growing regions and the province-wide tobacco fields were calculated.The spatial distribution characteristics were analyzed,and Pearson correlation and curve regression were used to quantify the driving factors influencing soil organic carbon contents in tobacco fields.The results showed that the average organic carbon content in the topsoil was 17.15 g/kg,with an average carbon density of 60.50 t/ha and a total carbon stock of 23.978 million tons.The ranking of soil organic carbon contents in the topsoil across different tobacco growing regions in descending order was east Yunnan,west Yunnan,southeast Yunnan,northeast Yunnan,central Yunnan and southwest Yunnan,the ranking for carbon density was east Yunnan,west Yunnan,central Yunnan,southeast Yunnan,northeast Yunnan and southwest Yunnan,for soil carbon stock was west Yunnan,east Yunnan,central Yunnan,southeast Yunnan,southwest Yunnan and northeast Yunnan.It was found that organic carbon content in the topsoil of tobacco fields was strongly positively correlated with soil alkali-hydrolyzable nitrogen,available phosphorus,available potassium and average annual precipitation(p<0.01),significantly negatively correlated with average annual temperature and average annual sunshine hours(p<0.01),and negatively correlated with soil pH value(p<0.05).Among these,alkali-hydrolyzable nitrogen content was the primary explanatory factor for the spatial variation of organic carbon content in topsoil.Accurate and systematic evaluation of soil organic carbon in tobacco fields at the regional scale in Yunnan Province provides important references for improving soil fertility and productivity.关键词
烟田/土壤/有机碳/碳密度/碳储量/空间分布Key words
Tobacco field/Soil/Organic carbon/Carbon density/Carbon stock/Spatial distribution分类
农业科技引用本文复制引用
段智源,邓小鹏,王斌,李军营,陈志杰,赵琛健,刘志勇,邵蕊,周凤花,李玉娥,刘运通..云南烟田耕层土壤有机碳空间分布特征及影响因素分析[J].烟草科技,2026,59(6):23-33,11.基金项目
云南大观实验室科技项目"云南烟田碳源汇特征及减排增汇潜力评估"(YNDG202302YY03,2023530000241025)、"植烟土壤养分活化机制与高效利用关键技术研究"(YNDG202402YY01) （YNDG202302YY03,2023530000241025）
云南省教育厅科学研究基金项目"'双碳'背景下云南省典型烟田低碳-高产种植模式探究"(2025J0921). （2025J0921）
