Effect of Feeding Low-Oil Ddgs to Laying Hens and Broiler Chickens on Performance and Egg Yolk and Skin Pigmentation

Two experiments were conducted to evaluate the nutritional quality of two sources of low-oil distiller's dried grains with solubles (DDGS) and their pigmenting ability for broiler chicken skin and egg yolks. In Experiment 1, 360 Bovan-White hens between 69 and 77 weeks of age were randomly assigned to five dietary treatments with 6 replicates of 12 hens each. In Experiment 2, 375 Ross 308 broiler chickens were randomly assigned to five treatments with three replicates of 25 birds each. The chickens were fed the experimental diets from one to 42 d of age. In both experiments, treatments consisted of a basal diet with no DDGS, and diets with 6% or 12% inclusion of DDGS from two sources. In Experiment 1, no significant differences in performance were detected among treatments (p> 0.05). Egg yolk pigmentation, according to CR-400 Minolta Colorimeter redness (a) and yellowness (b), linearly increased (p<0.05) with DDGS inclusions. In Experiment 2, no significant differences (p>0.05) were detected among treatments in growth performance, carcass yield, or abdominal fat at 42 d of age. Yellowness linearly increased (p<0.05) in the skin and abdominal fat of the birds that consumed diets with DDGS. The results of the current study indicate that feeding two sources of low-oil DDGS to broiler chicks or laying hens does not negatively affect egg production or growth performance while improves egg yolk and skin yellowness

Assessment of a phytase included with lactic acid on productive parameters and on deposition of phosphorus, calcium, and zinc in laying hens fed with sorghum–soybean-meal-based diets

In an acidic pH, the phytic acid is more soluble and therefore, more susceptible to the action of an exogenous phytase (Phy). 50 Hy-Line W36 hens were randomly allocated into five treatments, each one with 10 replicates (one bird/replicate): (1) Positive Control (0.25% of available phosphorus (Pav)); (2) Negative Control (NC; 0.12% Pav); (3) NC + 0.5% lactic acid (LA); (4) NC + 450 FTU/kg Phy; (5) NC + 0.5% LA + 450 FTU/kg Phy. Low levels of Pav (0.12%) negatively affected the production parameters compared to the 0.25% Pav diet. LA alone only improved the egg laying production, egg mass, and feed intake. When Phy was included, the production parameters improved, being similar from 0.25% Pav diet. Additionally, the deposition of P, Ca, and Zn increased in the bone marrow, as well as Fe contents in the yolk. Phy addition decreased P excretion compared to diets with the same level of Pav. There was no difference between the use of Phy alone or in combination with LA. In conclusion, the addition of Phy into low Pav diets produced results that were similar to those obtained with 0.25% of Pav, without any additive effect seen when LA was also added