Long-term moderate fertilization increases the complexity of soil microbial community and promotes regulation of phosphorus cycling genes to improve the availability of phosphorus in acid soil

人类受精 生物 自行车 微生物种群生物学 基因组 肥料 氮气循环 土壤微生物学 相对物种丰度 农学 生态学 丰度(生态学) 基因 植物 土壤水分 细菌 氮气 化学 遗传学 考古 有机化学 历史
作者
Shunli Liu,Hao-Ming Li,Xiaoyu Xie,Yuanxue Chen,Ming Lang,Xinping Chen
出处
期刊:Applied Soil Ecology [Elsevier BV]
卷期号:194: 105178-105178 被引量:13
标识
DOI:10.1016/j.apsoil.2023.105178
摘要

Microbial community and functional genes associated with phosphorus (P) cycling are intrinsic to soil P transformation. Yet, how the P fertilization rates affect the interactions of the microbial community and functional genes of P profiles is urgently needed to improve fertilizer P utilization efficiency. To address this, we conducted a long-term field experiment on purple acid soil in southwestern China using five mineral P fertilization rates. We analyzed the amplicon and metagenomic sequencing data to investigate the impact of P application rates on the bacterial and fungal communities as well as P cycling genes. Our results indicate that the community structure of both microbes and functional genes was significantly affected by P fertilization. Compared to other P levels, P application at 33 kg P ha−1 significantly increased the average degree and cohesion in the bacteria-fungi network, while the interactions between P cycling genes and microbes were also complex. Meanwhile, P application up to 16 kg P ha−1 increased the abundance of dominant functional genes (gcd and phoD), which were negatively correlated with Po and Pi. Nocardioides, Candidatus Solibacter, and Gaiella were the dominant taxon that induced the P cycling. The partial least squares path model (PLS-PM) revealed that SOM and pH were the main factors influencing AP by affecting the diversity and cohesion of the bacteria-fungi community, as well as gene abundance of P cycling genes under long-term gradient P fertilization. Overall, these results highlight the potential of moderate P fertilization to promote the stability of the microbiology and P transformation in acid soil.
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