Abstract
Dairy farming may have negative impacts on the environment, such as ammonia emissions to air and nitrate leaching to water. By selecting more efficient cows, the amount of nitrogen excreted per cow and consequently the adverse environmental impacts will be reduced. The aim of this study was to predict nitrogen use efficiency (NUE) of individual dairy cows using mid-infrared (MIR) spectra of milk. A total of 600 feeding and MIR records of 56 Holstein cows were collected from a farm in Beijing, China. NUE was calculated as the ratio of nitrogen in milk to nitrogen intake. The coefficient of determination of the best model was 0.69, 0.62 and 0.70 for NUE, nitrogen loss and dry mater intake, respectively. The MIR wavenumbers around 981.00 and 1506.93 cm-1 and daily milk yield were the most important variables for prediction. These results show potential for large-scale genetic evaluations of nitrogen efficiency.
Original language | English |
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Title of host publication | Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP) |
Subtitle of host publication | Technical and species orientated innovations in animal breeding, and contribution of genetics to solving societal challenges |
Editors | R.F. Veerkamp, Y. de Haas |
Place of Publication | Wageningen |
Publisher | Wageningen Academic Publishers |
Pages | 203-206 |
ISBN (Electronic) | 9789086869404 |
DOIs | |
Publication status | Published - 2022 |
Event | World Congress on Genetics Applied to Livestock Production: WCGALP 2022 - Rotterdam, Netherlands Duration: 3 Jul 2022 → 8 Jul 2022 |
Conference/symposium
Conference/symposium | World Congress on Genetics Applied to Livestock Production: WCGALP 2022 |
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Country/Territory | Netherlands |
City | Rotterdam |
Period | 3/07/22 → 8/07/22 |