Effects of wheat variety and specific weight on dietary apparent metabolisable energy concentration and performance of broiler chicks
| Autor: | C M Preston, K J McCracken, C Butler |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Male
Starch Weight Gain Potassium bicarbonate chemistry.chemical_compound Casein medicine Animals Dry matter Food science Triticum Sodium bicarbonate Geography Viscosity Specific weight Broiler General Medicine Animal Feed chemistry Animal Nutritional Physiological Phenomena Animal Science and Zoology medicine.symptom Energy Intake Energy Metabolism Chickens Nutritive Value Weight gain Food Science |
| Zdroj: | British Poultry Science. 43:253-260 |
| ISSN: | 1466-1799 0007-1668 |
| DOI: | 10.1080/00071660120121472 |
| Popis: | 1. This study used 4 wheat cultivars (Brigadier, Chaucer, Consort, Reaper) from three locations (Crossnacreevy, C; Downpatrick, D; Limavady, L), which had given rise to differences in wheat specific weight (SW), to examine the relationships between apparent metabolisable energy (AME) concentration, broiler performance and wheat SW. 2. The diets contained (g/kg): wheat 744, casein 142, blended vegetable fat 50, dicalcium phosphate 22, potassium bicarbonate 10.8, sodium bicarbonate 7.5, arginine 5, methionine 2, binder 8, trace minerals/vitamins 7.2, titanium dioxide 1.5. The diets were heat-treated (80 degrees C for 2 min) prior to pelleting (3 mm die). 3. SW ranged from 63 to 77 kg/hectolitre (hl), averaging 66, 69 and 76 kg/hl at D, C and L, respectively. In vitro viscosity of the wheat samples ranged from 5.2 to 17.5 cps and thousand grain weight (TGW) from 33.4 to 47.3 g. Mean TGW was similar at C and D (38.7, 37.0 g) but higher at L (43.1 g). In vitro viscosity was similar at C and L (11.2, 10.2 cps) but somewhat higher at D (14.4 cps). Crude protein (6.25 N) ranged from 116 to 147 g/kg and tended to be higher at D. Starch, which ranged from 612 to 656 g/kg, was least at D (617 g/kg) and greatest at L (641 g/kg). 4. Crude protein, crude fibre and total non-starch polysaccharide (NSP) were negatively correlated with SW, the R2 being respectively 0.38 (P |
| Databáze: | OpenAIRE |
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