total digestible nutrients


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total digestible nutrients

an outmoded method of expressing the energy value of a feed; abbreviated TDN. Estimated as follows:
$$\rm %TDN={{DCP+DCF+DNFE+(DEE\times2.25)} \over {feed \ consumed\times100} }$$
where DCP = digestible crude protein, DCF = digestible crude fat, DNFE = digestible nitrogen-free extract, DEE = digestible ether extract.
One pound of TDN = 2000 kcal of digestible energy.
References in periodicals archive ?
The total digestible nutrients (TDN) of each grass sample were calculated by the equation of Wardeh (1981):
The Dry Matter (DM) yield, Crude Protein (CP) and Total Digestible Nutrients (TDN) was calculated on the basis of chemical analysis.
The yield of DM, CP and total digestible nutrients (TDN) was calculated on the basis of chemical analysis.
Coefficients of digestibility, availability of ashes and total digestible nutrients of diets according to crude protein (CP) rate and supplemented protected fat addition.
Experiment 1: The effect of hot environment on total digestible nutrients and digestible crude protein intakes, and milk production
The total digestible nutrients (TDN) were obtained according to the equation adopted by the NRC (2001), where: TDN = [digestible CP + digestible NDFcp + NFC + (2.
Changes in body weight, and intake, digestibility and total digestible nutrients of diets Diets (1) CONT SBOIL Changes in body weight (kg/d) 0.
Intake of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), fibrous carbohydrates (FCH) and total digestible nutrients (TDN) in kg [day.
Digestibility coefficients and total digestible nutrients in heifers according to different treatments Protein supplement (kg/d) Item 0 0.
FE= feeding efficiency; DRMI = daily dry matter intake (grams of DM); FT = feeding time (hours); CENDFc = consumption efficiency of NDFc; DINDFc = daily NDFc intake (grams of NDFc); DCTDN = daily consumption of TDN (grams of TDN); RT = rumination time (hours); RENDFc = rumination efficiency (grams of NDFc); RETDN = rumination efficiency of total digestible nutrients (grams of RETDN).
The estimated total digestible nutrients (TDNest) of the raw materials and the total diets were calculated according to the equations described by NRC (2001).

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