Phiên âm: /kruːd ˈprəʊtiːn/
Từ loại: Noun
Nghĩa tiếng Việt:
Prôtêin thô, chất đạm. Được tính toán từ hàm lượng nitơ tổng số của thức ăn thông qua quy trình phân tích của Kjeldahl.
Nghĩa tiếng Anh:
The crude protein content of a feed sample represents the total nitrogen (N) in the diet, which includes not only true protein but also non-protein nitrogen (e.g., urea and ammonia in a feed; nitrate is not included in non-protein nitrogen). Because N is an integral part of any amino acid, non-protein nitrogen has the potential to be utilized for protein synthesis by rumen microorganisms. In laboratory analysis, total N present in a feed sample is first determined and then the total amount of protein is calculated by multiplying the total N by a factor. This factor is 6.25 for forages because leaf and stem tissue proteins generally contain 16 percent nitrogen, or one part nitrogen to 6.25 parts protein. For seeds, this factor is different (e.g., 5.70 for wheat and 5.90 for other cereal grains). Unless otherwise stated, protein values given in lab reports, feed tables and feed tags are crude protein.
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