现代农业研究2024，Vol.30Issue(4)：124-128,5.
云南植烟土壤有机碳含量对土壤磷库组成和磷吸附特性的影响
Effect Organic Carbon Content on Phosphorus Fractions and Adsorption Characteristics of Tobacco Soil in Yunnan
摘要
Abstract
Soil organic carbon(SOC)loss and phosphorus deficiency are the key factors limiting the productivity of tobacco-growing soil in Yunnan.In order to promote the co-management of carbon and phosphorus,this study collected soil samples of typical tobacco-growing soil with SOC gradient in Yunnan,and analyzed the soil phosphorus pool composition(Hedley method),phosphorus adsorption kinetic characteristics and its correlation with SOC.The coupling relationship between carbon and phosphorus storage capacity was discussed.The results showed that SOC mainly affected the content of adsorbed phosphorus.With the increase of SOC,the content of loose adsorbed phosphorus decreased,and the content of tightly adsorbed phosphorus and total phosphorus increased,but the relationship between water-soluble phosphorus and stable phosphorus and SOC was not significant.The Elovich model has a good description effect on the phosphorus adsorption kinetic characteristics of all soils.The relationship between α and SOC is not significant,but β and SOC are significantly negatively correlated,indicating that the increase of SOC has little effect on the initial phosphorus adsorption rate in tobacco planting soil,but reduces the rate of adsorption activation energy increasing with the surface coverage of soil particles,resulting in strong adsorption more easily.The initial adsorption rate had no significant relationship with the adsorbed phosphorus content,but with the increase of β,NaHCO3-P decreased,NaOH-P and total phosphorus increased.The above results indicated that the increase of SOC content in tobacco-growing soil improved the adsorption strength of soil phosphorus,promoted the transformation from loose adsorbed phosphorus to tightly adsorbed phosphorus,reduced the risk of soil phosphorus loss,increased the content of reserve phosphorus reservoir,and was conducive to reducing the application of phosphorus fertilizer and increasing the efficiency.关键词
土壤有机碳/磷库组成/磷吸附动力学/植烟土壤Key words
organic carbon/phosphorus fractions/phosphorus adsorption kinetics/tobacco soil分类
农业科技引用本文复制引用
宋梦琪,魏晓梦,胡彬彬..云南植烟土壤有机碳含量对土壤磷库组成和磷吸附特性的影响[J].现代农业研究,2024,30(4):124-128,5.基金项目
云南省烟草公司科技计划项目"加热卷烟原料赋味增香发酵调制技术研发"(项目编号:2021530000241008) （项目编号:2021530000241008）
