Neutral detergent fibre (NDF)
Phát âmPhiên âm: /ˈnjuːtrəl dɪˈtɜːdʒənt ˈfaɪbər/
Từ loại: Noun
Nghĩa tiếng Việt:
Xơ hoà tan trong chất tẩy trung tính
Nghĩa tiếng Anh:
NDF is the residue or insoluble fraction left after boiling a feed sample in neutral detergent solution. The NDF contains plant cell wall components except for some pectins. The NDF is considered a close estimate of the total fiber constituents of feedstuffs since it measures cellulose, hemicellulose, lignin, silica, tannins and cutins. The hemicellulose, cellulose and lignin represent the fibrous bulk of the forage. Because they give the plant rigidity and enable it to support itself as it grows, these three components are classified as structural carbohydrates. Though lignin is indigestible, hemicellulose and cellulose can be (in varying degrees) digested by microorganisms in animals with either a rumen (e.g., cattle, goats or sheep) or hind-gut fermentation (e.g., horses, rabbits, guinea pigs) as part of their digestive tract.
NDF concentration is negatively correlated with dry matter intake (i.e., as NDF in the forage increases, animals will consume less forage). As a result, NDF is often used in formulas to predict the dry matter intake.
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