Nitrogen fertilizer amount has minimal effect on rhizosphere bacterial diversity during different growth stages of peanut

PeerJ

article

Zheng Yang¹  Lin Li²  Wenjuan Zhu¹  Siyuan Xiao¹  Siyu Chen¹  Jing Liu¹  Qian Xu¹  Feng Guo³  Shile Lan¹ 

[1] College of Bioscience and Biotechnology, Hunan Agricultural University;College of Agronomy, Hunan Agricultural University;Biotechnology Research Center, Shandong Academy of Agricultural Sciences

关键词: Rhizosphere microbiota;    Nitrogen fertilizer;    Peanut;    Arachis hypogaea;    High-throughput sequencing;   

DOI  :  10.7717/peerj.13962

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The impact of short-term nitrogen fertilizer input on the structure and diversity of peanut rhizosphere microbiota (RM) at different growth stages (GSs) was explored in the southern paddy soil planting environment. Three levels of nitrogen were applied in the field: control (LN, 0 kg/hm2), medium nitrogen (MN, 55.68 kg/hm2), and high nitrogen (HN, 111.36 kg/hm2). The rhizosphere soil was collected during four GSs for high-throughput sequencing and chemical properties analysis. The effect of nitrogen fertilizer application on peanut RM was minimal and was obvious only at the seedling stage. In the four peanut GSs, a significant increase in relative abundance was observed for only one operational taxonomic unit (OTU) of Nitrospira under HN conditions at the seedling stage and mature stage, while there was no consistent change in other OTUs. The difference in RM among different peanut GSs was greater than that caused by the amount of nitrogen fertilizer. This may be due to the substantial differences in soil chemical properties (especially alkali-hydrolyzable nitrogen, pH, and available potassium or total potassium) among peanut GSs, as these significantly affected the RM structure. These results are of great value to facilitate deeper understanding of the effect of nitrogen fertilizer on peanut RM structure.

【 授权许可】

CC BY