西南农业学报2025，Vol.38Issue(7)：1377-1383,7.DOI:10.16213/j.cnki.scjas.2025.7.003
碳基调理剂对植烟土壤—微生物量碳氮磷的影响
Effects of carbon-based conditioner on microbial biomass carbon,nitrogen and phosphorus in tobacco-planting soil
摘要
Abstract
[Objective]It is of great significance to explore the characteristics of soil microbial biomass changes of carbon,nitrogen and phos-phorus and the influence of ecological econometric ratio after applying different carbon-based conditioners.And the changes of soil nutrient supply were identified to provide direction for screening suitable carbon based conditioner.[Method]The high fertility soil in Zhaotong area was taken as the research object.A field block experiment was conducted to evaluate different carbon-based conditioning treatments under the same exogenous application rate.And the effects of three kinds of carbon-based conditioners on carbon,nitrogen and phosphorus of tobacco-planting soil and their microbial biomass were analyzed,and the relationship between their stoichiometric ratios was discussed.[Result]After applying different C/N ratio soil conditioners,tobacco growing soil showed different trends of increasing SOC,TN,TP,MBC,MBN,MBP and C/N,C/P,N/P,MBC/MBN,MBC/MBP,MBN/MBP descending.In terms of soil physical and chemical properties,compared with CK(C/N=0)treatment,T1(C/N=20)and T3(C/N=60)treatments increased SOC content by 1.24％and 2.19％,respectively;The TN content of T1,T2(C/N=40)and T3 treatments increased by 6.27％,6.72％and 9.75％,respectively,while the TP content increased by 25.23％,13.06％and 25.68％,respectively;The C/N content decreased by 49.19％,14.73％and 70.27％,respectively,and the C/P content decreased by 18.99％,19.34％and 18.67％,respectively;Also the N/P content decreased by 14.78％,5.32％and 12.62％,re-spectively.In soil microbial biomass,compared with CK treatment,the MBC content in T1 and T3 treatment was increased by 30.49％and 30.48％,respectively;The MBN content of T1 and T2 treatment was increased by 22.81％and 6.74％,respectively;But the MBP content of T2 and T3 treatment was increased by 50.86％and 391.88％,respectively;The MBC/MBN content of T2 treatments decreased by 51.37％;The MBP content in T2 and T3 treatments decreased by 65.41％and 51.67％,respectively,and the MBN/MBP content of T2 and T3 treat-ments decreased by 20.82％and 83.89％,respectively.Redundancy analysis showed that MBC had a positive effect on SOC and TP,and a negative effect on TP content;MBN had a significant negative effect on SOC,TN,TP,and a negative effect on C/P.MBP had a significant positive effect on SOC and TP.Moreover,MBC/MBN showed a significant positive effect on SOC,TN and TP;Both MBC/MBP and MBN/MBP had a positive effects on SOC and TP,and a significantly positive effects on C/N;Correlation analysis showed that MBC was positively correlated with SOC,positively correlated with TP,and negatively correlated with N/P/MBN was significantly positively correlated with SOC.[Conclusion]The C/N=60(T3)treatment can significantly increase the contents of SOC,TN,TP,MBC,MBP,MBC/MBN and effectively regulate the stoichiometric relationship between soil carbon,nitrogen and phosphorus and microbial biomass carbon,nitrogen and phosphorus.The results can provide a theoretical reference for improving the high fertility soil in cold mountainous areas and the quality production of flue-cured tobacco.关键词
碳基调理剂/微生物生物量/植烟土壤/生态化学计量比/终烤期Key words
Carbon-based conditioners/Microbial biomass/Tobacco planting soil/Ecological stoichiometric ratio/Final curing period分类
农业科技引用本文复制引用
蔡宛含,赵新梅,胡家田,张潇,马鸿,易云朗,江友毅,张转勇,王炽,闫辉..碳基调理剂对植烟土壤—微生物量碳氮磷的影响[J].西南农业学报,2025,38(7):1377-1383,7.基金项目
红塔烟草(集团)有限责任公司重点科技项目(2023YL02) （集团）
云南省高层次科技人才及创新团队选拔专项(202305AS350013) （202305AS350013）
云南省科技人才与平台计划(202405AW340005) （202405AW340005）
