Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (3): 146-158. doi: 10.7668/hbnxb.20194778

Special Issue: Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Fertilizer Reduction Combined with Organic Fertilizer on Physicochemical Properties and Microbial Community Structure of Tobacco-planting Soil

SUN Zijun1, ZHONG Guoxing1, ZHANG Shaobo2, YANG Xin3, PENG Jinliang2, GUO Wei2, LIANG Yaoxing3, LI Huaiyuan4, BAI Yunfeng2, CHEN Jianjun4, DENG Shiyuan1   

  1. 1 Tobacco Laboratory,South China Agricultural University,Guangzhou 510642,China
    2 Hengyang Tobacco Company of Hunan Province,Hengyang 421000,China
    3 China Tobacco Guangdong Industrial Co.,LTD.,Guangzhou 510610,China
    4 Center for Basic Experiment and Practice Training,South China Agricultural University,Guangzhou 510642,China
  • Received:2023-12-29 Published:2024-06-28

Abstract:

To explore the effects of fertilizer reduction and organic fertilizer application on physicochemical properties and microbial community structure of tobacco-planting soil,and provide theoretical reference for fertilizer reduction and rational application of organic fertilizer in tobacco production.Using conventional fertilization without organic fertilizer as control(CK),Illumina high-throughput sequencing technology combined with bioinformatics,the changes of soil physical and chemical properties and microbial community structure under different treatments such as 10% reduction of fertilizer(T1),10% reduction of fertilizer+sesame cake fertilizer(T2),10% reduction of fertilizer + humic acid fertilizer(T3),and 10% reduction of fertilizer + sesame cake fertilizer + humic acid fertilizer(T4)were analyzed.The results showed that compared with CK,soil nutrient content and soil enzyme activity decreased under T1 treatment,and soil physical properties were slightly improved.Combined with organic fertilizer,soil nutrient and physical properties were further improved,bulk density decreased,moisture content and porosity increased,and the contents of available phosphorus and available potassium under T2 and T4 treatment were significantly higher than those under CK and T1 treatment.The enzyme activity of soil treated with organic fertilizer increased significantly.Combined application of organic fertilizer increased the bacteria and fungi in tobacco-growing soil,among which the dominant bacteria were Proteobacteria and Actinobacteriota.Followed by Firmicutes,Bacteroidota,Chloroflexi and Acidobacteriota.The dominant fungal groups are Ascomycota,Anthophyta,Mortierellomycota,Chlorophyta,Ciliophora and Basidiomycota.The Alpha diversity index showed that the reduction of fertilizer decreased the richness of microbial community,but the combined application of organic fertilizer increased the diversity index of bacterial and fungal communities,and the bacterial community richness increased more significantly.RDA analysis showed that the important soil physicochemical factors affecting soil microbial community structure and diversity included organic matter,available potassium,alkali-hydrolyzed nitrogen,available phosphorus and soil physical properties,etc.Soil physicochemical factors had a greater impact on bacterial community structure.In conclusion,under the condition of fertilizer reduction,organic fertilizer combined with organic fertilizer can significantly improve soil nutrients,physical properties,soil enzyme activity and microflora structure,especially when combined with sesame cake fertilizer and humic acid fertilizer treatment.

Key words: Tabacco, Fertilizer reduction, Organic fertilizer, Tobacco-growing soil, Physicochemical properties, Microbial community structure

Cite this article

SUN Zijun, ZHONG Guoxing, ZHANG Shaobo, YANG Xin, PENG Jinliang, GUO Wei, LIANG Yaoxing, LI Huaiyuan, BAI Yunfeng, CHEN Jianjun, DENG Shiyuan. Effects of Fertilizer Reduction Combined with Organic Fertilizer on Physicochemical Properties and Microbial Community Structure of Tobacco-planting Soil[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(3): 146-158. doi: 10.7668/hbnxb.20194778.

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