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Nitrogen losses and the utilization of ammonium nitrogen by herbage from spread slurry produced by pigs offered diets formulated to reduce nitrogen excretion

Published online by Cambridge University Press:  05 November 2021

T.H. Misselbrook
Affiliation:
Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon EX20 2SB, United Kingdom
B.F. Pain
Affiliation:
Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon EX20 2SB, United Kingdom
R.M. Kay
Affiliation:
ADAS Terrington, Terrington St Clement, King's Lynn, Norfolk PE34 4PW, United Kingdom
P.A. Lee
Affiliation:
ADAS Terrington, Terrington St Clement, King's Lynn, Norfolk PE34 4PW, United Kingdom
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Extract

Nitrogen losses following application of pig slurry to grassland represent not only a loss of available N for plant growth, but also a source of air and water pollution by ammonia volatilization, denitrification and nitrate leaching. Previous small scale experiments showed that by reducing the crude protein content of the pigs diet, the slurry nitrogen content was also reduced (Hobbs et al., in press). The aim of this study was to investigate the nitrogen uptake by herbage and losses to the environment following application to grassland of slurry from pigs fed a reduced crude protein diet.

Type
Pig Nutrition
Copyright
Copyright © The British Society of Animal Science 1996

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References

Hobbs, P.J., Pain, B.F., Kay, R.M. and Lee, P.A. Reduction of odorous compounds in fresh pig slurry by dietary control of crude protein. Journal of Science of Food and Agriculture in press.Google Scholar