Assessing the Impact of Non‐Urea Ruminant Urine Nitrogen Compounds on Urine Patch Nitrous Oxide Emissions

Gardiner, Camilla A.; Clough, Timothy J.; Cameron, Keith; Di, Hong J.; Edwards, Grant; Klein, Cecile A. M. de

doi:10.2134/jeq2018.03.0112

Cited by 12 publications

(4 citation statements)

References 38 publications

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“… Gardiner et al. (2018) reported that non-urea nitrogenous compounds including allantoin, creatinine, creatine, and uric acid in cattle urine did not affect the EF3 of N 2 O.…”

Section: Discussionmentioning

confidence: 95%

Effects of dietary inclusion with rapeseed cake containing high glucosinolates on nitrogen metabolism and urine nitrous oxide emissions in steers

et al. 2022

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Two consecutive trials were conducted to investigate the effects of glucosinolates (GLS) in rapeseed cake (RSC) on nitrogen (N) metabolism and urine nitrous oxide (N 2 O) emissions in steers. In trial 1, 8 steers and 4 levels of RSC, i.e. 0, 2.7%, 5.4% and 8.0% dry matter (DM) (0, 6.0, 12.1, 18.1 μmol GLS/g DM) were allocated in a replicated 4 × 4 Latin square. In trial 2, the static incubation technique was used for measuring the N 2 O emissions of the urine samples collected from trial 1. The results of trial 1 indicated that dietary inclusion of RSC decreased the digested N and increased the fecal N excretion ( P < 0.01), whereas it did not affect the urinary N excretion, total N excretion and N retention ( P > 0.10). Dietary inclusion of RSC decreased the urinary excretion of urea while it increased allantoin, total purine derivatives, the predicted rumen microbial N flow and thiocyanate (SCN) ( P < 0.05). Dietary inclusion of RSC did not affect the plasma triiodothyronine and thyroxine while it down-regulated the plasma relative concentrations of 4-aminohippuric acid, 3α,7α-dihydroxycoprostanic acid, phosphatidylserine (14:0/16:0), 6β-hydroxyprogesterone, pyrrhoxanthinol, tatridin B, mandelonitrile rutinoside, taraxacoside ( P < 0.05), and up-regulated hypoglycin B, neuromedin N (1-4), dhurrin, 5-deoxykievitone ( P < 0.01). The results of trial 2 indicated that dietary RSC increased the steer urine N 2 O–N fluxes, the ratio of N 2 O–N to N application and the estimated steer urine N 2 O–N emissions ( P < 0.01). A close correlation was found between the estimated steer urine N 2 O–N emissions and the output of urinary SCN ( P < 0.001). In conclusion, dietary RSC increased the fecal N excretion, whereas it did not affect the urinary N excretion and the N retention rate in steers. Dietary RSC increased rather than decreased the urine N 2 O–N emissions even though it decreased the urinary excretion of urea. The SCN excreted in urine could be the major factor in increasing the urine N 2 O–N emissions. Whether other metabolites excreted into urine from RSC have an impact on the urine N 2 O–N emissions in steers needs to be investigated in the future.

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“… Gardiner et al. (2018) reported that non-urea nitrogenous compounds including allantoin, creatinine, creatine, and uric acid in cattle urine did not affect the EF3 of N 2 O.…”

Section: Discussionmentioning

confidence: 95%

Effects of dietary inclusion with rapeseed cake containing high glucosinolates on nitrogen metabolism and urine nitrous oxide emissions in steers

et al. 2022

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“…The proportion of uric acid-N in urine N is less than 1.8% ( Table 1 ) because uric acid can be oxidized into allantoin in the liver ( Tas and Susenbeth, 2007 ), and the proportion of allantoin-N in urine N is 1.9% to 11.2% in beef cattle ( Table 1 ). No recent studies are available on the positive effects of creatinine, allantoin and uric acid on the N 2 O emissions of cattle urine ( Gardiner et al., 2018a ).…”

Section: Impacts Of Urinary Nitrogenous Compounds Of Cattle On N ...mentioning

confidence: 99%

Potentials of using dietary plant secondary metabolites to mitigate nitrous oxide emissions from excreta of cattle: Impacts, mechanisms and perspectives

Gao

Zhao

2022

Animal Nutrition

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“…Allantoin, creatinine, and hippuric acid are other principal N compounds that occur in urine (Gardiner et al 2018). The purine derivative allantoin is derived from rumen microbial nucleic acids.…”

Section: Urinary N Compoundsmentioning

confidence: 99%

Mineral salt intake effects on faecal-N concentration and the volume and composition of beef cattle urine

Cardoso

Neto²,

Azenha

et al. 2018

Trop Anim Health Prod

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The effect of mineral salts on water ingestion and urine volume in cattle has been extensively studied. However, recently, this effect has been investigated as a potential mitigator of environmental aspects related to the nitrogen (N) cycle, such as nitrate (NO) lixiviation, ammonia (NH) volatilisation, and nitrous oxide (NO) emissions. The effect of mineral salts, particularly sodium chloride (NaCl), on urine-N concentration, urine volume, the proportion of N compounds in the urine, and faecal-N concentration has not yet been explored in field conditions with respect to environmental aspects of beef cattle production. The present study investigated the effect of dietary mineral salt rates on these parameters. A Latin square (5 × 5) experimental design was utilised with five concentrations of mineral salts in the diet: 0.0, 2.0, 4.0, 6.0, and 8.0 g based on dry matter (DM) ingestion (g/kg DM). The nitrogen concentration in the urine and urine volume increased linearly. The total N excreted (g/day) via urine did not vary with increasing mineral salt concentrations. When evaluated, the N compounds of urine (urea-N, allantoin-N, and hippuric acid-N) also reacted to the increased mineral salt concentrations, while creatinine-N did not. Urea-N, allantoin-N, and hippuric acid-N linearly increased their proportions in total N-urine. The N concentration in faeces was not affected by mineral salt concentrations. The urine volume, concentration of N, and proportion of N compounds in the urine affected NO emissions and NH volatilisation. Therefore, mineral salt utilisation may be an option for mitigating N pollution from beef cattle, especially for grasslands in tropical countries.

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Assessing the Impact of Non‐Urea Ruminant Urine Nitrogen Compounds on Urine Patch Nitrous Oxide Emissions

Cited by 12 publications

References 38 publications

Effects of dietary inclusion with rapeseed cake containing high glucosinolates on nitrogen metabolism and urine nitrous oxide emissions in steers

Effects of dietary inclusion with rapeseed cake containing high glucosinolates on nitrogen metabolism and urine nitrous oxide emissions in steers

Potentials of using dietary plant secondary metabolites to mitigate nitrous oxide emissions from excreta of cattle: Impacts, mechanisms and perspectives

Mineral salt intake effects on faecal-N concentration and the volume and composition of beef cattle urine

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