Feed intake and efficiency are economically important traits because feed is the greatest variable cost in beef production. Feed efficiency can be measured as residual feed intake (RFI), which is the difference between actual DMI of an animal and the expected DMI based on its BW and growth rate. Feed conversion ratio (FCR) is the inverse of gross feed efficiency and is the ratio of DMI to ADG. ...

the objective of this study was to evaluate the performance of male broiler chickens in the period from 21 to 42 days of age fed diets with increasing levels of sunflower meal (sm) supplemented with an enzyme complex (ec). a total of 1920 animals of the cobb strain were distributed in a randomized block design in a 4 × 3 factorial arrangement (four sm levels and three enzymes utilization types)...

This present study was conducted to evaluate the effects of dietary inclusion of 4, 8 and 12 g kg(-1) phytogenic feed additives mixture on performance, egg quality, ovary parameters, serum biochemical parameters and yolk trimethylamine level in laying hens. The results of experiment have shown that egg weight was increased by supplementation of 12 g kg(-1) feed additive whereas egg production, ...

to compare the effect of coccidiostate drugs (salinomycin and maduramicin) on the oocyst sheding and performance of coccidi-infected broiler chicken, 180 ross 308 broiler chicken were randomly assigned to four treatments. each treatment contains 3 replacements of 15 chickens. treatment 1 and 2 fed diets supplemented with maduramicin and salinomycin until three days before experiment period, res...

Risers are considered vital parts on fluidized catalytic cracking (FCC) conversion units. It is inside the riser that the heavy hydrocarbon molecules are cracked into petroleum fractions such as gasoline and liquefied petroleum gas (LPG). A simplified kinetic flow model in combination with the Tank-In-Series model was used to predict the conversion response of an FCC riser to changes in feed te...

Objective: Lighting requirements of birds have to be considered for choosing the optimal light intensity. Therefore, the experiment was carried out to study the effects of the different light intensities on performance, welfare and behavior of turkey poults. Materials and Methods: A total of 81 turkey poults aging 3 weeks were randomly selected and divided into three equal groups. The birds wer...

This study was conducted to compare the effects of a preventive in-feed medication programme using tilmicosin (Pulmotil 200 premix, Elanco Animal Health) at 200 p.p.m. with those of Mycoplasma hyopneumoniae (Mh) vaccination programme (Stellamune Mycoplasma, Pfizer Animal Health). A pig herd with chronic respiratory disease in which infection with Mh played an important role was selected, and a ...

in order to evaluate the effects of chlorella on broiler performance and immune system, an experimentwas performed by using 80 ross 308 male broiler chicks. the experiment was accomplished incompletely randomized design including 5 treatments with 4 replication and 4 observations in eachreplicate. the basal diet was based on corn-soybean meal (control) and without any additives. agraded level o...

in order to evaluate the effects of chlorella on broiler performance and immune system, an experimentwas performed by using 80 ross 308 male broiler chicks. the experiment was accomplished incompletely randomized design including 5 treatments with 4 replication and 4 observations in eachreplicate. the basal diet was based on corn-soybean meal (control) and without any additives. agraded level o...

Black soldier fly larvae (BSFL) are highly efficient at converting organic substrates into insect biomass suitable for livestock nutrition. BSFL conversion efficiency depends on the nature of their feed, and formulation approaches use macronutrient contents to reach a targeted performance. However, digestibility varies between ingredients data is lacking due methods unsuitable insects living in...