中国草地学报2025，Vol.47Issue(3)：45-53,9.DOI:10.16742/j.zgcdxb.20240283
外源黄腐酸钾对高盐胁迫下盐地碱蓬种子萌发和幼苗生长的影响
Effects of Exogenous Potassium Fulvic Acid on Seed Germination and Seedling Growth of Suaeda salsa under Salt Stress
摘要
Abstract
This study investigated the effects of exogenous potassium fulvic acid(PFA)on seed germi-nation,seedling growth,and physiological mechanisms of Suaeda salsa L.under salt stress(300 mmol/L NaCl).Seeds were treated with PFA at of 0(P0),12.5(P1),25(P2),50(P3),100(P4),and 200(P5)mg/L during the germination and seedling period.This research provides technical guidance for improving the germination and growth of the halophytes S.salsa in saline soils and offers a scientific basis for the remediation and utilization of saline-alkali land.The results showed that 300 mmol/L NaCl inhib-ited seed germination and normal seedling growth.However,PFA application mitigated these inhibitory effects.Specifically,P2 and P3 treatments significantly enhanced seed germination and seedling growth indices.Exogenous PFA significantly increased soluble sugar and proline content,as well as catalase and peroxidase activities,while significantly decreasing malondialdehyde and hydrogen peroxide content under salt stress.With increasing PFA concentrations,the soluble sugar and proline content,and catalase and peroxidase activities initially increased and subsequently decreased,whereas malondialdehyde and hydro-gen peroxide content initially decreased and then increased.Principal component analysis revealed the fol-lowing ranking of PFA treatment effectiveness in alleviating salt stress:P3>P2>P4>P5>P1>P0.The optimal PFA concentration was determined to be 50 mg/L.Grey correlation analysis identified soluble sugar content,catalase activity,root length,shoot length,and superoxide dismutase activity as the top five factors correlated with exogenous PFA concentrations.In conclusion,the addition of 50 mg/L PFA effec-tively alleviated salt stress inhibition of seed germination and seedling growth,primarily by enhancing anti-oxidant and osmotic regulation.关键词
盐地碱蓬/黄腐酸钾/盐胁迫/种子萌发/幼苗生长Key words
Suaeda salsa/Potassium fulvic acid/Salt stress/Seed germination/Seedling growth分类
农业科技引用本文复制引用
郁凯,邢锦城,赵小慧,刘冲,董静,何苏南,王绪奎,郁洁,尚辉,张骁..外源黄腐酸钾对高盐胁迫下盐地碱蓬种子萌发和幼苗生长的影响[J].中国草地学报,2025,47(3):45-53,9.基金项目
江苏省碳达峰碳中和科技创新专项资金项目(BE2022-304) （BE2022-304）
2023年省级农业科技创新与推广补助专项(YHS2023026) （YHS2023026）
盐城市重点研发计划(社会发展)指导性项目(YCBE202338) （社会发展）
农业农村部沿海盐碱地科学观测实验站开放课题暨所基金项目(YHS202206) （YHS202206）
