Effects of inclusion of corn gluten feed in dairy rations on dry matter intake,milk yield,milk components,and ruminal fermentation parameters: a meta-analysis

Tropical Animal Health and Production - Corn gluten feed (CGF) is a co-product of wet milling that can replace energy or fiber ingredients in dairy cow rations. The present meta-analysis examines...     

Effects of a locally produced blood meal on performance, carcass traits and nitrogen retention of broiler chickens

The study was designed as a 2 x 5 factorial arrangement with main effects of feeding blood meal as a replacement of 0, 25, 50, 75 or 100% of dietary fish meal and the duration of this substitution at 1-42 or 21-42 days of age. One thousand 1 day old male Cobb 500 broiler chicks assigned randomly to each of 40 floor pens (25 birds/pen) and were fed five isonitrogenous and isocaloric feeds formulated to contain 20.38 and 17% crude protein and 2900 and 3000 kcal kg(-1) metabolizable for starter and grower periods, respectively. Duration of dietary manipulation didn't affect the measured parameters. More than 25% blood meal/fish meal substitution ratios significantly increased chickens daily weight gain and decreased the cost of producing a unit of meat. Other traits didn't affect by dietary fish meal/blood meal replacement ratio. Spleen and proventriculus percents and small intestine length affected by level of replacement but didn't follow a distinct pattern. These results indicate that this locally produced blood meal is a suitable substitute for dietary fish meal and a full replacement didn't cause any adverse effect on performance, carcass important traits and dietary nitrogen retention of broiler chickens.     

The favorite dosage of garlic meal as a feed additive in broiler chickens ratios

This experiment carried out as a completely randomized design with six treatments and 3 replicates pens of 100 birds each (total of 1800 birds). Treatments were consisted of a common corn-soybean meal based starter and grower diets supplemented by 0, 0.125, 0.25, 0.5, 1 or 2% garlic meal. At 1-21 days of age, daily feed intake per chicks influences by dietary garlic meal level so that the birds fed diets with 0.125 and 0.25% garlic meal had a significantly higher daily feed intake (p < 0.05) than birds fed 0.5% dietary garlic meal. At 22-42 days of age and the whole experimental period (1-42 days of age), garlic meal level didn't affect daily feed intake. No significant difference recorded for daily weight gain of experimentally birds at 1-21 days of age, But at 22-42 days of age and the whole experimentally period (1-42 days of age) the birds fed the control diet (free of garlic meal) and the diet containing the highest garlic meal dosage (2%) had a significantly lower daily weight gain in compare to other birds (p < 0.05). At 1-21 days of age the birds fed diet supplemented with 0.5% garlic meal had a lower feed conversion ratio than the control birds (p < 0.05) but at 22-42 days of age and the whole experimentally period (1-42 days of age) birds fed the control diet and the diet whit 2% garlic meal supplement showed a higher feed conversion ratios in compare with birds fed diets containing 0.125, 0.5 or 1% garlic meal. No significant differences were detected in carcass percentage and interior organs between birds fed experimental diets. The weight gain reduction in birds fed 2% dietary garlic meal means that herbal additives have their limitations too and needs more investigation.