Metabolizable and net energy values of corn stored for 3 years for laying hens

Abstract

The apparent metabolizable energy ( AME ), AME corrected to zero-nitrogen retention ( AMEn ), and net energy ( NE ) values of 2 corn samples both stored for 3 yr were determined in laying hens with reference diet substitution method. Reference diet was formulated according to standard layer requirement, and test diets contained 50% of corn samples and 50% of the reference diet. Fifty-four Hy-Line Brown hens at the age of 36 wk were used. The heat production and energy metabolism of birds were measured in open-circuit respiratory chambers with 6 replicates (3 birds per replicate) per diet in a randomized design. Birds were fed experimental diets for 7 D in the chamber as adaptation. During the following 3 D, feed intake, metabolizable energy value, nitrogen balance, energy balance, egg production, O 2 consumption, CO 2 production, and energy efficiency were determined. The AME values of corn 1 and corn 2 were 3,485 and 3,675 kcal/kg DM, respectively. The corresponding AMEn values were 3,452 and 3,596 kcal/kg DM, and the NE values were 2,575 and 2,693 kcal/kg DM, respectively. The NE:AME ratios of corn 1 and corn 2 were 74.4 and 73.3%, respectively. The NE:AMEn ratios of corn 1 and corn 2 were 75.0 and 74.9%, respectively. The AME, AMEn, and NE values of the 2 corn samples both stored for 3 yr were lower than the literature values for fresh corn.

Determination of metabolisable and net energy contents of corn fed to Arbor Acres broilers and Beijing You chickens

“…The NE:AME ratio represents the efficiency of AME utilisation for NE. The NE:AME values of corn were 80.6% in broilers reported by Wu et al (2019), 74.7% in laying hens reported by Barzegar et al (2019) and ranged between 73.3 and 74.4% in laying hens reported by Liu et al (2020). In the current study, the NE:AME ratio of corn in AA, BJY1 and BJY2 chickens were 74.26% and 73.40% and 74.57% respectively.…”

Energy values evaluation and improvement of soybean meal in broiler chickens through supplemental mutienzyme

“…However, even SBM6 contained the lowest NDF content and the highest CP level, its AME was not the highest in the study. This may help explain the results that the high-protein diet could lead to wastage of resources and higher CP content was not always positively related to energy ( Liu et al., 2020 ). The concentration of AME was approximately 28% lower in poultry than that in swine, partly attributed to low digestibility of the oligosaccharides in the gut of poultry.…”

Energy Values of Corn and Rice Bran and Energy Levels for Ducks – Basis in Establishing Energy Requirement for Improved Philippine Mallard Duck

“…On the other hand, Mtei et al (2019) reported that fine, medium, and coarse corn particle sizes have an AMEn of 3421, 3477 and 3462 kcal/kg, respectively for Hy-line brown layer chickens. Liu et al (2020) reported slightly lower energy values on two corn samples stored for three years where the recorded AME and AMEn values were 3294 and 3389 and 3222 and 3294 kcal/kg dry matter for samples 1 and 2, respectively for 35-week old Hy-line brown layers.…”