Impact of polyacrylic acid as soil amendment on soil microbial activity under different moisture regimes DOI Creative Commons
Christian Buchmann, Sebastian Rudolph,

Janina Neff

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Abstract Polyacrylic acid (PAA), a synthetic superabsorbent polymer (SAP), enhances the maximum water holding capacity (WHCmax), stability, and aeration of soil but may directly or indirectly impact microbiome by altering properties. However, respective studies on its effects microbial activity in terms respiration functional diversity remain scarce. In this study, we examined PAA sand loam treated with at three concentrations (25, 250, 2500 mg Kg− 1) either incubated under constant moisture ten drying-rewetting cycles. During incubation, WHCmax, pH, were measured via headspace CO2 MicroResp assay. increased WHCmax both soils remained stable, except static moisture. Initially, lowered pH soils, which persisted only disappeared after one week. Further, cycles raised compared to conditions. suppressed substrate-induced (SIR) for carbohydrates, amines, carboxylic acids, particularly sand, where high led up 100% suppression. Responses varied: increased, while conditions reduced higher concentrations, respectively. Overall, whereas regimes texture dominant factors loam. This highlights dual SAPs: improving retention certain period, potentially reducing nutrient cycling, depending type, application rates, environmental long term.

Язык: Английский

Impact of polyacrylic acid as soil amendment on soil microbial activity under different moisture regimes DOI Creative Commons
Christian Buchmann, Sebastian Rudolph,

Janina Neff

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Abstract Polyacrylic acid (PAA), a synthetic superabsorbent polymer (SAP), enhances the maximum water holding capacity (WHCmax), stability, and aeration of soil but may directly or indirectly impact microbiome by altering properties. However, respective studies on its effects microbial activity in terms respiration functional diversity remain scarce. In this study, we examined PAA sand loam treated with at three concentrations (25, 250, 2500 mg Kg− 1) either incubated under constant moisture ten drying-rewetting cycles. During incubation, WHCmax, pH, were measured via headspace CO2 MicroResp assay. increased WHCmax both soils remained stable, except static moisture. Initially, lowered pH soils, which persisted only disappeared after one week. Further, cycles raised compared to conditions. suppressed substrate-induced (SIR) for carbohydrates, amines, carboxylic acids, particularly sand, where high led up 100% suppression. Responses varied: increased, while conditions reduced higher concentrations, respectively. Overall, whereas regimes texture dominant factors loam. This highlights dual SAPs: improving retention certain period, potentially reducing nutrient cycling, depending type, application rates, environmental long term.

Язык: Английский

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