Nitrification rate in dairy cattle urine patches can be inhibited by changing soil bioavailable Cu concentration

Ammonia oxidation to hydroxylamine is catalyzed by the ammonia monooxygenase enzyme and copper (Cu) is a key element for this process. We investigated the effect of soil bioavailable Cu changes induced through the application of Cu-complexing compounds on nitrification rate, ammonia-oxidizing bacter...

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Published in:Environmental pollution (1987) 2023-03, Vol.320, p.121107-121107, Article 121107
Main Authors: Matse, Dumsane Themba, Jeyakumar, Paramsothy, Bishop, Peter, Anderson, Christopher W.N.
Format: Article
Language:English
Subjects:
Ammonia
ammonia monooxygenase
Ammonia-oxidizing archaea
Ammonia-oxidizing bacteria
Animals
Archaea
Bacteria
bioavailability
Bioavailable Cu
calcium
Cattle
copper
dairy cattle
dicyandiamide
genes
gibberellic acid
hydroxylamine
lignosulfonates
Mineral N leaching
Nitrification
Nitrification rate
nitrogen
oxidation
Oxidation-Reduction
Phylogeny
pollution
quantitative polymerase chain reaction
Soil
Soil Microbiology
split application
urine
winter
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Summary:Ammonia oxidation to hydroxylamine is catalyzed by the ammonia monooxygenase enzyme and copper (Cu) is a key element for this process. We investigated the effect of soil bioavailable Cu changes induced through the application of Cu-complexing compounds on nitrification rate, ammonia-oxidizing bacteria (AOB) and archaea (AOA) amoA gene abundance, and mineral nitrogen (N) leaching in urine patches using the Manawatu Recent soil. Further, evaluated the combination of organic compound calcium lignosulphonate (LS) with a growth stimulant Gibberellic acid (GA). Treatments were applied in May 2021 as late-autumn treatments: control (no urine), urine-only at 600 kg N ha−1, urine + dicyandiamide (DCD), urine + co-poly-acrylic-maleic acid (PA-MA), urine + LS, urine + split-application of LS (2LS), and urine + combination of GA plus LS (GA + LS). In addition, another four treatments were applied in July 2021 as mid-winter treatments: control, urine-only at 600 kg N ha−1, urine + GA, and urine + GA + LS. Soil bioavailable Cu and mineral N leaching were examined during the experimental period. The AOB/AOA amoA genes were quantified using quantitative polymerase chain reaction. Changes in soil bioavailable Cu across treatments correlated with nitrification rate and AOB amoA abundance in late-autumn while the AOA amoA abundance did not change. The reduction in soil bioavailable Cu induced by the PA-MA and 2LS was linked to significant (P 
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2023.121107