TY - GEN
T1 - The effects of feeding different ensiled forages on the minerals excreted from growing lambs - implications for farm nutrient budgets.
AU - Fychan, R.
AU - Marley, C. L.
AU - Fraser, Mariecia Dawn
AU - Theobald, Vince
AU - Jones, Raymond
N1 - Fychan, A. R., Marley, C. L., Fraser, M. D., Theobald, V. J., Jones, R. (2007). The effects of feeding different ensiled forages on the minerals excreted from growing lambs - implications for farm nutrient budgets. 'High Value Grassland: providing biodiversity, a clean environment and premium products': Proceedings BGS/BES/BSAS Conference, Keele University, Staffs, 17-19 April 2007. British Grassland Society Occasional Symposium, 38. Hopkins, J. J., Duncan, A. J., McCracken, D. I., Peel, S., Tallowin, J. R. B. (Eds)., pp. 217-220.
PY - 2007
Y1 - 2007
N2 - Losses of minerals, such as phosphorus (P), from slurry are small compared to nitrogen losses, and slurry is therefore generally mineral-rich relative to plant nutrient needs. Samples from three experiments were analysed to test the hypothesis that the excretion of minerals differs in lambs offered different ensiled forages. Experiment 1 compared lambs offered ensiled forage peas or field beans, Experiment 2 compared lambs offered ensiled red clover, lucerne or birdsfoot trefoil and Experiment 3 compared lambs offered ensiled sainfoin or kale. In each experiment, six Suffolk-cross wethers were allocated to each silage and group-housed for 14 d. Lambs were then adapted to metabolism crates for 7 d before data was collected over 7 d. Daily amounts of silage offered, silage refused and urine and faeces produced were measured and sub-sampled for mineral analysis. Results showed differences in mineral intake or excretion between lambs offered different silages. For example, faecal P output of lambs offered red clover was lower than when lambs were offered birdsfoot trefoil or lucerne (P<0.05). Faecal K output was higher in lambs offered birdsfoot trefoil than red clover or lucerne (P<0.05) but there were no differences in the amount of urinary P or K lost.
AB - Losses of minerals, such as phosphorus (P), from slurry are small compared to nitrogen losses, and slurry is therefore generally mineral-rich relative to plant nutrient needs. Samples from three experiments were analysed to test the hypothesis that the excretion of minerals differs in lambs offered different ensiled forages. Experiment 1 compared lambs offered ensiled forage peas or field beans, Experiment 2 compared lambs offered ensiled red clover, lucerne or birdsfoot trefoil and Experiment 3 compared lambs offered ensiled sainfoin or kale. In each experiment, six Suffolk-cross wethers were allocated to each silage and group-housed for 14 d. Lambs were then adapted to metabolism crates for 7 d before data was collected over 7 d. Daily amounts of silage offered, silage refused and urine and faeces produced were measured and sub-sampled for mineral analysis. Results showed differences in mineral intake or excretion between lambs offered different silages. For example, faecal P output of lambs offered red clover was lower than when lambs were offered birdsfoot trefoil or lucerne (P<0.05). Faecal K output was higher in lambs offered birdsfoot trefoil than red clover or lucerne (P<0.05) but there were no differences in the amount of urinary P or K lost.
UR - http://hdl.handle.net/2160/12387
M3 - Conference Proceeding (Non-Journal item)
SN - 978-0905944364
SN - 0905944364
VL - 38
T3 - British Grassland Society Occasional Symposium
SP - 217
EP - 220
BT - High value grassland: providing biodiversity, a clean environment and premium products
A2 - Hopkins, J. J.
A2 - Duncan, A. J.
A2 - McCracken, D. I.
A2 - Peel, S.
A2 - Tallowin, J. R. B.
PB - British Grassland Society
T2 - High Value Grasslands: providing biodiversity, a clean environment and premium products'. A joint BGS/BSAS/BES Conference
Y2 - 17 April 2007 through 19 April 2007
ER -