中国生态农业学报（中英文）2026，Vol.34Issue(4)：843-851,9.DOI:10.12357/cjea.20250325
不同施肥处理下旱地红壤金属元素对细菌、真菌及原生生物丰度的影响
Effects of metals on the abundances of bacteria,fungi,and protists in dryland red soil under different fertilization treatments
摘要
Abstract
Fertilization can cause significant alterations in the chemical properties of soil,with these changes in turn influencing soil metal content and distribution.Moreover,the levels and patterns of these metals can have a direct influence on soil health,plant growth,and ecosystem balance.In this study,performed at the Red Soil Research Institute in Jinxian County,Nanchang City,Jiangxi Province,we investigated the effects of metals on the abundances of bacteria,fungi,and protists in a long-term fertilization plot for dryland red soil,in which we set up the following four treatments:no fertilization,application of chemical fertilizer,application of organic fertilizer,and combined application of chemical and organic fertilizers.By measuring the chemical properties and the contents of metals in soil and the abundances of bacteria,fungi and protists,and performing correlation analysis,we sought to identify the key metals influencing the abundance of these organisms under different fertilization treatments,and the associated mechanisms of action.The results revealed that compared with no fertilization,organic fertilizer and combined chemical and organic fertilizer treatments significantly increased the abundances of bacteria,fungi,and protists,whereas the chemical fertilizer treatment only significantly increased the abundances of bacteria and fungi,it had no significant effects on that of protists.In addition,compared with no fertilization,the organic fertilizer and combined chemical and organic fertilizer treatments significantly increased the content of Mg element by 4.82％and 2.75％,respectively,and elevated the content of Ca element by 170.37％and 164.81％in the soil.Conversely,the organic fertilizer and combined chemical and organic fertilizer treatments significantly reduced the content of Al element by 5.00％and 5.67％,and decreased the content of Fe element by 5.35％and 6.10％,respectively.Further correlation analysis revealed that the abundance of protists was significantly positively correlated with soil pH,and contents of organic carbon,total phosphorus,Mg,and Ca,and negatively correlated with soil Al and Fe contents.Correlation analysis also revealed that the abundances of bacteria,fungi,and protists were significantly positively correlated with soil total phosphorus,total nitrogen,organic matter,available potassium,available phosphorus,dissolved organic carbon,nitrate nitrogen,and ammonium nitrogen contents.Our findings indicated that the abundances of bacteria and protists were significantly positively correlated with soil Mg and Ca contents.However,their abundances were significantly negatively correlated with soil Al and Fe contents,which could be attributed to the fact that the addition of organic fertilizer may cause reductions in the Al and Fe contents of soil by inducing the formation of iron-aluminum-organic complexes.This would accordingly provide a greater range of habitats and more abundant nutrient supply for microorganisms,which in turn would promote increases in the abundances of bacteria,fungi and protists,whereas by promoting increases in the contents of Ca and Mg.The addition of organic fertilizer may indirectly enhance the metabolic efficiency and surface attachment sites of microorganisms,ultimately leading to increases in the abundances of bacteria,fungi,and protists.In conclusion,by contributing to reductions in the contents of Al and Fe,and increasing the contents of Mg and Ca,the application of organic fertilizers can increase the abundances of bacteria,fungi and protists.Our findings in this study provides an important theoretical basis for optimizing fertilization strategies for dryland red soil and contribute to elucidating the response mechanisms of soil microorganisms to metal elements.关键词
施肥措施/红壤/细菌/真菌/原生生物/金属Key words
fertilization measures/red soil/bacteria/fungi/protist/metal分类
农业科技引用本文复制引用
李思怡,余腾,劳丞一,黄国勤,徐慧芳..不同施肥处理下旱地红壤金属元素对细菌、真菌及原生生物丰度的影响[J].中国生态农业学报（中英文）,2026,34(4):843-851,9.基金项目
江西省科技厅省部级项目(20232BAB215015)、江西农业大学校级项目(2023B2SZ03)和江西省研究生创新专项资金项目(YC2025-S422)资助 This study was supported by the Provincial and Ministerial Projects of Jiangxi Provincial Department of Science and Technology(20232BAB215015),the School-level Project of Jiangxi Agricultural University(2023B2SZ03),and the Jiangxi Province Graduate Student Innovation Special Fund Project(YC2025-S422). （20232BAB215015）
