Estimation of Nitrogen Use Efficiency for Ryegrass-Fed Dairy Cows: Model Development Using Diet- and Animal-Based Proxy Measures
نویسندگان
چکیده
This study aimed to identify suitable predictors of nitrogen (N) use efficiency (NUE; milk N/N intake) for cows that differed in breeds and were fed with ryegrass pasture, using existing data from the scientific literature. Data 16 studies used develop models based on relationships between NUE dietary animal-based factors. a further 10 model validation. Milk urea N (MUN) water-soluble carbohydrate-to-crudeprotein ratio (WSC/CP) best most practical animal- diet-based proxies predict NUE. The results indicate it might be necessary adopt separate different when WSC/CP but not MUN.
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ژورنال
عنوان ژورنال: Dairy
سال: 2021
ISSN: ['2624-862X']
DOI: https://doi.org/10.3390/dairy2030035