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Aspects of nitrogen metabolism in sheep-fed mixed diets containing tree and shrub foliages
| Content Provider | Scilit |
|---|---|
| Author | Patra, Amlan K. |
| Copyright Year | 2009 |
| Description | 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 $(R^{2}$0·75), UN $(R^{2}$0·81) and total N excretion $(R^{2}$0·86). Addition of dietary N concentration and FL for FN $(R^{2}$0·82), dietary N concentration and foliage NI for UN $(R^{2}$0·85), and FL and foliage NI for total N excretion $(R^{2}$0·92) as supporting predictors to this relationship slightly $increasedR^{2}$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. |
| Related Links | https://www.cambridge.org/core/services/aop-cambridge-core/content/view/DBF812D3BA2F9EC1C4CE0F391C0B5FA5/S0007114509993254a.pdf/div-class-title-aspects-of-nitrogen-metabolism-in-sheep-fed-mixed-diets-containing-tree-and-shrub-foliages-div.pdf |
| Ending Page | 1330 |
| Page Count | 12 |
| Starting Page | 1319 |
| ISSN | 00071145 |
| e-ISSN | 14752662 |
| DOI | 10.1017/s0007114509993254 |
| Journal | British Journal Of Nutrition |
| Issue Number | 9 |
| Volume Number | 103 |
| Language | English |
| Publisher | Cambridge University Press (CUP) |
| Publisher Date | 2010-05-14 |
| Access Restriction | Open |
| Subject Keyword | British Journal Of Nutrition Agriculture and Animal Production Nutrition and Dietetics Foliage in the Diets |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nutrition and Dietetics Medicine |
