Nutritional Characteristics of Camelina Meal for Broiler Chickens17 March 2015
Research carried out in the US and Turkey indicates that camelina meal is poorly utilised by three-week-old broilers.
Limited information on nutritional characteristics on camelina meal for broiler chickens limits its use in diets of broiler chickens, according to O. Adeola of Purdue University.
Together with co-authors there and at Istanbul in Turkey, the researchers explain in a paper published in Poultry Science that they aimed to determine the ileal digestible energy (IDE), metabolisable energy (ME) and nitrogen-corrected ME (MEn) contents of two different camelina meals (CM1 and CM2) for three-week-old broiler chickens using the regression method and to determine glucosinolate compounds in the camelina meal samples.
The CM1 and CM2 were incorporated into a corn-soybean meal-based reference diet at three levels (0, 100 or 200g per kg) by replacing the energy-yielding ingredients.
These five diets (reference diet, and 100 and 200g per kg camelina meal from each of CM1 and CM2) were fed to 320 male Ross 708 broilers from days 21 to 28 post hatching with eight birds per cage and eight replicates per treatment in a randomised complete block design.
Excreta were collected twice daily from days 25 to 28, and jejunal digesta and ileal digesta from the Meckel's diverticulum to approximately 2cm proximal to the ileo-caecal junction were collected on day 28.
Total glucosinolate content for CM1 and CM2 were 24.2 and 22.7nmol per mg, respectively.
Jejunal digesta viscosity was linearly increased (P<0.001) from 2.2 to 4.1 centipoise (cP) with increasing dietary camelina meal levels.
There were linear effects (P<0.001) of CM1 and CM2 substitution on final weight, weight gain, feed intake and gain:feed ratio.
The inclusion of CM1 and CM2 linearly decreased (P<0.001) ileal digestibility of dry matter (DM), energy and IDE.
The supplementation of CM1 and CM2 linearly decreased (P<0.001) the retention of DM, nitrogen, and energy; ME, and MEn.
By regressing the CM1 and CM2-associated IDE intake in kilocalories against kilograms of CM1 and CM2 intake, the IDE regression equation was:
- Y = −10 + 1,429 × CM1 + 2,125 × CM2, r2=0.55
which indicates that IDE values were 1,429kcal per kg of DM for CM1 and 2,125kcal per kg of DM for CM2.
The ME regression was:
- Y = 5 + 882 × CM1 + 925 × CM2, r2=0.54
which implies ME values of 882kcal per kg of DM for CM1 and 925kcal per kg of DM for CM2.
MEn regression was:
- Y = 2 + 795 × CM1 + 844 × CM2, r2 = 0.52
which implies MEn values of 795kcal per kg of DM for CM1 and 844kcal per kg of DM for CM2.
Based on these results, Adeola and co-authors concluded that the utilisation of energy and nitrogen in camelina meal by broiler chickens is low and the high viscosity observed in jejunal digesta as well as the total glucosinolate in camelina meal may have contributed to the poor energy and nitrogen utilisation.
Pekel A.Y., J.I. Kim, C. Chapple and O. Adeola. 2015. Nutritional characteristics of camelina meal for 3-week-old broiler chickens. Poultry Science. 94:371-378. doi: 10.3382/ps/peu066
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