Performance and color of broilers fed diets containing Rhodocyclus gelatinosus biomass

Abstract

The objective of this study was to evaluate the effect of different supplementation levels of Rhodocyclus gelatinosus biomass on the performance and pigmentation of broilers. Cobb broilers were raised in pens and were fed a sorghum-based diet until 35 days of age. At the 36th day of age, ninety-six birds were randomly distributed to four treatments consisting of experimental diets with different supplementation levels of Rhodocyclus gelatinosus biomass (0, 75, 150 and 300 ppm) added to the finisher basal diet, which were given for seven days. A completely randomized experimental design was used, with four treatments, four replicates and six broilers per parcel. Birds and diets were weighed at the 36th and at the 42nd day of age for performance analysis. There was no significant effect on broiler feed intake. Significant differences in weight gain and feed conversion were seen between the control group and the groups supplemented with 75 and 150 ppm. The treatment with the highest supplementation level and the control group had best weight gain and feed conversion. Color analysis showed that R. gelatinosus biomass supplementation resulted in more yellow breast skin and increased darkening and color purity in breast and thigh meat of broilers, but had no effect on lightness or color purity of breast and thigh skins

Can Direct Conversion of Used Nitrogen to New Feed and Protein Help Feed the World?

“…Phototrophic bacteria are effective as animal feed. 56 The key restriction for microbial food/feed production from wastewater is potential contamination of the product for instance with pathogens. Only in specific cases such as food processing wastewater is there a case for direct-contact assimilation from wastewater.…”

From a Pollutant Byproduct to a Feed Ingredient

“…People often associate strong colors of a food item to safety and health and so look for strongly pigmented products. Taking it into account, Ponsano et al (2002bPonsano et al ( , 2004a added Rhodocyclus gelatinosus biomass produced in poultry slaughterhouse wastewater in broilers rations and found an increase in the color of breast meat. Polonio et al (2010) used different concentrations of the same product in hens rations and found an improvement in yolks color, with no deleterious effects on birds performance.…”

Improving the color of bulgur: new industrial applications of tempering and UV/sun-light treatments

“…Visual appearance, especially color, is the most important characteristic of foods and determines the choice or rejection of the product by the consumer (Ponsano et al 2004). Bright yellow color is an important demand by consumers for bulgur (Bayram 2005), pasta (Schulthess et al 2013;Zhang and Hamaker 2012), noodle (Hatcher et al 2008;Ito et al 2007), and semolina (Fratianni et al 2005;.…”