Densities of gross energy
do not vary greatly among forages (Boertje 1990, Robbins 1993).
Regression equations for gross energy
concentrations in copra byproducts (kcal/kg, as-is basis; n = 388).
Regarding the digestibility of the test ingredients (Table 3), control diet of dry matter, gross energy
and crude protein were higher for DRB+Phy and Dephytinised DRB than DRB.
The gross energy
value of crude glycerin in this study does not resemble to any crude glycerin in the literature.
All these values were lower than those of gross energy
ADCs of crude glycerol determined in this study for silver catfish, probably due to their different chemical compositions.
Daily intakes of dry matter, crude protein, neutral detergent fiber, acid detergent fiber and gross energy
are presented in Table (II).
Crude lipid was determined by the Soxthlet method (AOAC, 1984), ash was determined by combusting dry samples in a muffle furnace at 550[degrees] for 12 h (AOAC, 1984), and the gross energy
content of dry samples was determined with PARRI281 bomb calorimeter (PARR Instrument Company, USA).
Samples of the diets, ingredients, feces, and urine were analyzed for gross energy
(GE) concentration using a bomb calorimeter (C 2000; IKA, Staufen, Germany).
(GE) was determined using an adiabatic calorimeter (SXHW-III Tianyu Hebi China).
Thus, the study was conducted to evaluate the effect of including cassava scraps in diets of broilers on performance (weight gain, feed intake and feed conversion) and on feasibility of broilers production, and also to evaluate dry matter metabolizability (DM), crude protein (CP) and gross energy
(GE), from 1 to 21 days of age.
However, as the diet with higher protein level also presented around 7% higher gross energy
, it is not possible to exclude that dietary energy may also contribute to this variation.
The potential for using local renewable energy sources in Slovakia is estimated to be 20% of gross energy
consumption for biomass (especially in heating) and 5% for solar energy (very promising for heating water).