This study was carried out to determine the effects of dried grape pomace supplementation in a corn-soy-based diet on performance, egg quality, plasma and egg lipid peroxidation, and some biochemical parameters of laying hens. In this study, 96 moulted 80-week-old Bovans laying hens were distributed into three groups with eight replicates. The hens were fed a supplemented diet with 0% (control group), 4% and 6% grape pomace (experimental groups) for 12 weeks. In the study, the effects of grape pomace supplementation in a corn-soy-based diet on performance, internal and external egg quality, serum total cholesterol, total protein, glucose and triglyceride levels, and plasma and egg yolk malondialdehyde (MDA) levels were determined. The addition of grape pomace to laying hen diet did not significantly affect live weight, feed intake, egg production and feed efficiency (P > 0.05). In all treatment groups, supplementation did not significantly affect albumen index, Haugh unit, egg yolk index, yolk colour, eggshell ratio, eggshell thickness, egg-specific gravity, total cholesterol, total protein and triglyceride compared to the control group (P > 0.05). In the study, 4% grape pomace supplementation to diet significantly increased egg weight (P < 0.001), and both 4% and 6% grape pomace supplementation levels significantly increased liver weight (P < 0.05) and liver weight ratio (P < 0.01). Grape pomace addition to laying hens diet significantly decreased plasma MDA and serum glucose levels (P < 0.001). Also, grape pomace addition significantly decreased egg yolk MDA levels on day 1 (incubation on 0 minute; P < 0.001), and day 15 [incubation on 0, 30, 60 and 90 (P < 0.05) minutes]. The results of this study concluded that performance, egg quality and serum total cholesterol, total protein and triglyceride levels were not negatively affected. Plasma and egg yolk MDA, and serum glucose levels were reduced by 4% and 6% supplementation to laying hen diets. It was concluded that grape pomace supplementation has the potential to extend shelf life.

The aim of the study was to determine the nutrient composition and in vitro digestion parameters of Jerusalem artichoke ( Helianthus tuberosus L.) herbage at different maturity stages (vegetative, early flowering, full flowering and early seeding) in horses and ruminants. The crude protein...

The aim of the study was to compare different parts (leaves, fruits, seeds) of three Rosaceae species ( Rosa canina , Crataegus orientalis and Crataegus monogyna ) in terms of nutrient composition and in vitro ruminal fermentation parameters. The in vitro total gas production levels of...

The purpose of present study was to determine the quality and in vitro digestion parameters in silages of 100% pomegranate pomace (PPS), 100% apple pomace (APS) and 50% pomegranate pomace + 50% apple pomace (PAPS). The digestion parameters of 10% or 20% using of these silages in total mix ration (TMR) of dairy cattle were researched. The dry matter (DM), crude protein, flavonoids, tannins and anthocyanins of pomegranate pomace were higher than those of apple pomace. Fibrous and non-fibrous carbohydrates of pomegranate pomace were similar to those of apple pomace. The silage DM losses in APS decreased with pomegranate pomace (p = .004). The silage density, gas-methane production, and estimated digestion values of PPS and PAPS were higher than those of APS (p < .05). Lactic acid and pH value of APS and the PAPS were higher than the PPS (p < .01). The using of PPS up to 20% in TMR decreased in vitro estimated digestion of TMR (p < .05). The using of APS or PAPS up to 20% in TMR was appropriate for in vitro results. As a result, ensilaging of apple pomace with pomegranate pomace can increase silage density, silage DM; and can decrease silage DM losses; and do not affect silage quality-digestion parameters.