Sun-Dried Bovine Rumen Content (SDRC) as an Ingredient of a Ration for White Leghorn Layers.

Due to increasing price of conventional feeds, alternative locally available nonconventional feed ingredient is required for layers' production. Rumen contents are abundantly available as slaughterhouse by-product and mainly considered as waste material creating environmental pollution. Therefore, a study was conducted for 90 days to evaluate effects of sundried rumen content (SDRC) inclusion in layer rations on egg laying performance, egg quality parameters, fertility, and hatchability, chick quality and blood parameters. Treatment diets contained T1, T2, T3, and T4 at 0, 5, 10, and 15 percent SDRC, respectively. On chemical analysis, the rumen content contained 11.18% crude protein, 1.22% ether extract, 22.99% crude fibre, 21.54% ash and 1099.32 cal/kg of DM of metabolizable energy. The daily DM intake value increased (P < 0.05) with the increase in level of rumen content. The bird fed with 10 percent SDRC diet had a high DM intake. The weight gain and egg production of the laying hens reduced significantly (P < 0.05) as the level of rumen content increased. The average egg weight increased significantly (P < 0.05) with the increase in the level of rumen content. The feed to gain ratio increased as the level of rumen content increased in the diet. The hen fed T2 (5 percent SDRC) had the best feed to gain ratio. Most external and internal egg quality parameters, especially yolk color, were improved when the diet contained sun-dried rumen content (SDRC). Fertility, hatchability, early and mid embryonic mortality showed no significant differences among treatments. However, chick quality parameters increased (P < 0.05) with the increase in the level of rumen content. Mortality rate was not influenced by treatments. All blood parameters studied were within the normal range. It is concluded that under the condition of this experiment, diets up to 10% SDRC in the ration did not affect DMI, daily weight gain, egg production performances and blood parameters in white leghorn layers. [ABSTRACT FROM AUTHOR]