农业环境科学学报2025，Vol.44Issue(1)：73-84,12.DOI:10.11654/jaes.2024-0231
山药不同施肥管理下土壤碳氮养分和微生物群落分异特征
Differential characteristics of soil carbon and nitrogen nutrients and microbial community in yam fields under different fertilization practices
摘要
Abstract
In this study,the physiochemical characteristics and microbial community were investigated at several soil depths(surface,0-20 cm;subsurface,20-40 cm;and deep layer,40-60 cm)of yam fields under three fertilization practices(conventional fertilization,optimal fertilization,and humic acid application),with a maize field as a reference.The results showed that:in comparison to the maize field,the yam field under conventional fertilization had significantly higher ammonium nitrogen content in the subsurface and deep layers of the soil(2.09 times and 3.03 times those in surface soil,respectively)and nitrate nitrogen content in subsurface soil(up to 50.86 mg·kg-1,calculated by dry soil).However,optimal fertilization or humic acid treatment significantly decreased the ammonium nitrogen and nitrate nitrogen contents in the subsurface and deep layers by up to 79.55%for ammonium and 78.39%for nitrate.Compared with the maize field,yam planting under conventional fertilization significantly changed the bacterial and fungal community structure and decreased the complexity of the microbial cooccurrence network,while optimal fertilization and humic acid treatment showed no significant effect on the bacterial community.Among the three fertilization treatments in the yam field,the treatments of optimized fertilization and humic acid application possessed higher microbial network complexity and stability and significantly enriched beneficial bacteria groups such as Bacillus,Arthrobacter,Beauveria,and Glomus than under conventional fertilization treatment.These results suggest that yam plantation increases the risk of inorganic nitrogen migration into groundwater and has a significant impact on the soil microbial community composition.Optimizing fertilization and management practices for yam plantation can effectively reduce the accumulation of inorganic nitrogen in deep soils and maintain soil microbial community stability,and thus benefit the green and efficient development of the yam planting industry.关键词
山药施肥/腐植酸/硝态氮深层累积/微生物群落/共现网络Key words
yam fertilization/humic acid/nitrate accumulation in deep soil/microbial community/co-occurrence network分类
园艺学与植物营养学引用本文复制引用
李婷,葛安辉,孙志梅,刘四义,张丽梅,韩雪梅..山药不同施肥管理下土壤碳氮养分和微生物群落分异特征[J].农业环境科学学报,2025,44(1):73-84,12.基金项目
河北省重点研发计划项目(20326909D) （20326909D）
山东省自然科学基金项目(ZR2023MC159) Key Research and Development Program of Hebei Province,China(20326909D) （ZR2023MC159）
Natural Science Foundation of Shandong Province,China(ZR2023MC159) （ZR2023MC159）
