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Aspects of nitrogen metabolism in sheep-fed mixed diets containing tree and shrub foliages.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Patra, Amlan Kumar |
| Copyright Year | 2010 |
| Abstract | Data on N utilisation by sheep-fed diets containing foliages were analysed to develop prediction equations for N excretion in faeces (FN) and urine (UN), and to determine endogenous N excretion. Overall, 218 dietary treatments from forty-four publications were compiled in the database. This database was split into three subsets: without foliage in the diets (FL-0); foliage levels (FL) in between 0 and 310 g/kg (FL-L); FL in between 310 and 800 g/kg diets (FL-H) to study the effects of foliages on metabolic faecal N (MFN) and endogenous urinary N (EUN). Nitrogen intake (NI) as single independent factor was the best predictor of FN (R2 0.75), UN (R2 0.81) and total N excretion (R2 0.86). Addition of dietary N concentration and FL for FN (R2 0.82), dietary N concentration and foliage NI for UN (R2 0.85), and FL and foliage NI for total N excretion (R2 0.92) as supporting predictors to this relationship slightly increased R2 values. The monomolecular and exponential models slightly improved the prediction of N excretion with NI as a predictor compared with the linear model. The excretion of MFN was greater for FL-H compared with FL-0, but was similar between FL-0 and FL-L, and FL-L and FL-H. However, EUN decreased in FL-H compared with FL-0 and FL-L, but was similar between FL-0 and FL-L. In conclusion, using NI as the primary predictor produced an accurate prediction of N excretion. Inclusion of foliages in the diets may shift N excretion from urine to faeces and increase the excretion of MFN and EUN. |
| File Format | PDF HTM / HTML |
| DOI | 10.1017/S0007114509993254 |
| PubMed reference number | 19995471 |
| Journal | Medline |
| Volume Number | 103 |
| Issue Number | 9 |
| Alternate Webpage(s) | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/DBF812D3BA2F9EC1C4CE0F391C0B5FA5/S0007114509993254a.pdf/aspects_of_nitrogen_metabolism_in_sheepfed_mixed_diets_containing_tree_and_shrub_foliages.pdf |
| Alternate Webpage(s) | https://doi.org/10.1017/S0007114509993254 |
| Journal | The British journal of nutrition |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
