摘要
本研究以党参为试验材料,通过设置不同用量的化肥与γ-聚谷氨酸(γ-PGA)配施的处理,分析党参生长指标、土壤理化性质和微生物群落的变化,探讨γ-PGA与化肥配施对党参生长的影响及其可能的作用机制。结果显示:与不施用化肥和γ-PGA的对照(CK)相比,只施用γ-PGA的处理(T1)的党参株高、根直径、根长、根干重均无显著差异,但当γ-PGA与化肥配施后,党参的根干重和根冠比较T1处理显著(p<0.05)增加,增幅分别为4.10%~21.92%、2.45%~17.48%。γ-PGA与适量化肥配施显著提高了土壤的铵态氮、速效钾和有效磷含量,但会降低土壤的pH值。在土壤微生物方面,γ-PGA与适量化肥配施可显著增加土壤中的氨化细菌和好气性自生固氮菌的数量,增强土壤对有机氮的矿化作用和固氮能力。综上,我们认为,γ-PGA与适量化肥配施可通过改善土壤理化性状、促进有益微生物生长、改善根际土壤微生态环境等来促进党参生长。
In the present study,Codonopsis pilosula was selected as the test material.Different application rates of chemical fertilizers combined withγ-polyglutamic acid(γ-PGA)were set up as treatments,and the changes in growth indicators of C.pilosula,soil physicochemical properties,and microbial communities were determined,to explore the effects of combined application ofγ-PGA and chemical fertilizers on the growth of C.pilosula and its potential mechanism.The results showed that compared with the control(CK)without chemical fertilizers andγ-PGA,the T1 treatment with onlyγ-PGA application had no significant differences in plant height,root diameter,root length,and root dry weight of C.pilosula.However,after the combined application ofγ-PGA and chemical fertilizers,the root dry weight and root-shoot ratio of C.pilosula increased significantly(p<0.05)than those of the T1 treatment by 4.10%-21.92%and 2.45%-17.48%,respectively.The combined application ofγ-PGA and an appropriate amount of chemical fertilizers significantly increased the contents of ammonium nitrogen,available potassium,and available phosphorus in the soil,but decreased the soil pH value.Regarding soil microorganisms,the combined application ofγ-PGA and an appropriate amount of chemical fertilizers significantly increased the quantities of ammonifiers and aerobic azotobacter in the soil,enhancing the mineralization capacity of organic nitrogen and nitrogen-fixing capacity in soil.In conclusion,the combined application ofγ-PGA and an appropriate amount of chemical fertilizers could promote the growth of C.pilosula by improving soil physicochemical properties,promoting the growth of beneficial microorganisms,and optimizing the rhizosphere soil microecological environment.
作者
施静
李建宏
褚鹏星
余锐
姜明
陈光丽
赵小霞
冯莉
SHI Jing;LI Jianhong;CHU Pengxing;YU Rui;JIANG Ming;CHEN Guangli;ZHAO Xiaoxia;FENG Li(School of Chemical Engineering&Technology,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China;Department of Biological Engineering,Liupanshui Vocational and Technical College,Liupanshui 553000,Guizhou,China;School of Biological Sciences and Technology,Liupanshui Normal University,Liupanshui 553004,Guizhou,China)
出处
《浙江农业学报》
北大核心
2026年第1期85-94,共10页
Acta Agriculturae Zhejiangensis
基金
贵州省职业教育“技能贵州”行动计划项目(黔教函〔2025〕17号,黔教函〔2023〕100号)
2024年贵州省教育科学规划课题暨粤黔专项课题(2024A018)
六盘水市科技发展项目(52020-0-1-24)
六盘水职业技术学院院级项目(Lyk2405)
山地高原特色农产品技术创新中心(520202023018)。
关键词
党参
Γ-聚谷氨酸
化学肥料
磷脂脂肪酸
微生物群落
Codonopsis pilosula
γ-polyglutamic acid(γ-PGA)
chemical fertilizer
phospholipid fatty acid(PLFA)
microbial community
