Artificial humic acid improves P availability via regulating P-cycling microbial communities for crop growth

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-11-29 DOI:10.1007/s11104-024-07100-z

Yue Yuan, Fan Yang, Zhuqing Liu, Kui Cheng

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引用次数: 0

Abstract

Background and aims

A-HA (artificial humic acid) play essential roles to improve soil organic matter in agricultural soil, however, the relative mechanistic effects on soil phosphorus (P) transformation and availability resulting from stimulation of microbial activities and changes in microbial communities remain uncertain. This study investigated the responses of microbial communities in the rhizosphere, bulk soils, and unplanted soil with the combined application of A-HA and phosphate fertilizer to better understand the mechanisms by which A-HA affects P cycling.

Methods

Physical and chemical analyses, along with metagenomic methods, were employed to determine phosphorus availability and fractions, as well as to measure soil microbial diversity and the relative abundance of microbial P-cycling genes in bulk soil, rhizosphere soil, and unplanted soil subjected to varying levels of phosphorus fertilizer.

Results

The findings demonstrated that application of A-HA and phosphate fertilizers directly increased soil Olsen P and unstable P levels and indirectly altered microorganism functional genes involved in soil P cycling. More interestingly, 28 macrogenomic assembled genomes (MAGs) were reconstructed, all of which contained P cycle-related genes with copy numbers ranging from 1 to 8. In addition, we evaluated the correlation among maize biomass, photosynthetic characteristics, plant P uptake, and P utilization efficiency (PUE) and stabilized soil P fractions. A-HA + P0.5 treatment appeared the most promising due to its higher sustainability yield index and agronomic efficiency.

Conclusions

Our results highlight the importance of A-HA in promoting changes in microbial functional genes involved in soil P cycling with different P levels.

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.