Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production
Milk urea concentration (MU) has been extensively studied and is often used to evaluate energy and protein balance in dairy cattle diets, but not to this extent in dairy goat diets. The aim of this study was to determine the relationship between MU concentration and crude protein content (CP) in the...
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| Format: | Article |
| Language: | English |
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Croatian Dairy Union
2023-01-01
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| Series: | Mljekarstvo |
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| Online Access: | https://hrcak.srce.hr/file/428860 |
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| author | Darija Bendelja Ljoljić Zvonimir Prpić Tomislav Mašek Ivan Vnučec Antun Kostelić Miroslav Benić Neven Antunac |
| author_facet | Darija Bendelja Ljoljić Zvonimir Prpić Tomislav Mašek Ivan Vnučec Antun Kostelić Miroslav Benić Neven Antunac |
| author_sort | Darija Bendelja Ljoljić |
| collection | DOAJ |
| description | Milk urea concentration (MU) has been extensively studied and is often used to evaluate energy and protein balance in dairy cattle diets, but not to this extent in dairy goat diets. The aim of this study was to determine the relationship between MU concentration and crude protein content (CP) in the diet of Alpine goats in order to reduce excessive nitrogen excretion from the organism. For this purpose, 72 goats were randomly divided into three equal groups (24 animals) and fed a concentrate mix containing 14%, 16%, and 18% CP, respectively. The chemical composition of milk samples was determined and the ratio of milk fat to protein was calculated. Statistical analysis of the data was performed using the MIXED procedure (SAS V8 software package). Increasing CP from 14% to 16% in the diet increased daily milk yield by 0.4 kg (p<0.001), and MU concentration from 35.01 to 41.24 mg/100 mL (p<0.001). Based on the calculated inflection point of daily milk yield and protein content in milk, the range of MU concentration from 40.00 to 45.00 mg/100 mL can be considered optimal and is a good indicator of a balanced diet for goats. |
| first_indexed | 2024-04-24T09:07:56Z |
| format | Article |
| id | doaj.art-1e0983958999492283839172f35b40da |
| institution | Directory Open Access Journal |
| issn | 0026-704X 1846-4025 |
| language | English |
| last_indexed | 2024-04-24T09:07:56Z |
| publishDate | 2023-01-01 |
| publisher | Croatian Dairy Union |
| record_format | Article |
| series | Mljekarstvo |
| spelling | doaj.art-1e0983958999492283839172f35b40da2024-04-15T18:22:48ZengCroatian Dairy UnionMljekarstvo0026-704X1846-40252023-01-01732859410.15567/mljekarstvo.2023.0202Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk productionDarija Bendelja Ljoljić0Zvonimir Prpić1Tomislav Mašek2Ivan Vnučec3Antun Kostelić4Miroslav Benić5Neven Antunac6University of Zagreb, Faculty of Agriculture, Department of Dairy Science, Svetošimunska 25, 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Agriculture, Department of Animal Science and Technology, Svetošimunska 25, 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Veterinary Medicine, Department of Animal Nutrition and Dietetics, Heinzelova 55, 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Agriculture, Department of Animal Science and Technology, Svetošimunska 25, 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Agriculture, Department of Animal Science, Svetošimunska 25, 10000 Zagreb, CroatiaCroatian Veterinary Institute, Department for Bacteriology and Parasitology, Savska cesta 143, 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Agriculture, Department of Dairy Science, Svetošimunska 25, 10000 Zagreb, CroatiaMilk urea concentration (MU) has been extensively studied and is often used to evaluate energy and protein balance in dairy cattle diets, but not to this extent in dairy goat diets. The aim of this study was to determine the relationship between MU concentration and crude protein content (CP) in the diet of Alpine goats in order to reduce excessive nitrogen excretion from the organism. For this purpose, 72 goats were randomly divided into three equal groups (24 animals) and fed a concentrate mix containing 14%, 16%, and 18% CP, respectively. The chemical composition of milk samples was determined and the ratio of milk fat to protein was calculated. Statistical analysis of the data was performed using the MIXED procedure (SAS V8 software package). Increasing CP from 14% to 16% in the diet increased daily milk yield by 0.4 kg (p<0.001), and MU concentration from 35.01 to 41.24 mg/100 mL (p<0.001). Based on the calculated inflection point of daily milk yield and protein content in milk, the range of MU concentration from 40.00 to 45.00 mg/100 mL can be considered optimal and is a good indicator of a balanced diet for goats.https://hrcak.srce.hr/file/428860Alpine goatmilk ureaoptimal valuemilk qualitycrude protein |
| spellingShingle | Darija Bendelja Ljoljić Zvonimir Prpić Tomislav Mašek Ivan Vnučec Antun Kostelić Miroslav Benić Neven Antunac Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production Mljekarstvo Alpine goat milk urea optimal value milk quality crude protein |
| title | Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production |
| title_full | Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production |
| title_fullStr | Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production |
| title_full_unstemmed | Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production |
| title_short | Milk urea concentration as a tool for optimising crude protein content in dairy goat diets: a path to sustainable milk production |
| title_sort | milk urea concentration as a tool for optimising crude protein content in dairy goat diets a path to sustainable milk production |
| topic | Alpine goat milk urea optimal value milk quality crude protein |
| url | https://hrcak.srce.hr/file/428860 |
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