Effect of Adding Different Levels of Astaxanthin Extracted From an Algae Haematococcus Pluvialis to The Diet on Some Immunological Characteristics of Broilers Reared Under Natural and Elevated Environmental Conditions'

Abstract

Abstract This experiment was conducted at the poultry farm/Department of Animal Production/College of Agriculture/Al-Qasim Green University And for two experiments, The first for the period from 27/4/2019 to 7/6/2019 and the second from 1/7/2019 to 4/8/2019 for the second experiment to see the effect of adding different levels of astaxanthin to the broiler diet on some immune characteristics of broilers raised under environmental conditions Natural and elevated. Use 240 unsexed birds of one day age ROSS 308 strain, distributed randomly into five treatments by 48 birds/treatment and the birds of each treatment were divided into three replicates (16 birds/replicate). The chicks were fed on three diets that included the initiator, growth and final 23, 21.5 and 19.44% crude protein respectively, and the representative energy was 3000.5, 3100.7 and 3199.25 kcal/kg feed, respectively, in addition to the astaxanthin powder at levels 0, 10, 20, 30, 40 mg/kg of feed for T1, T2, T3, T4 and T5 treatments, respectively. The results of the first trial showed a significant superiority (P<0.05) for treatment T2 in the relative weight of the fabrichia gland and for the fabrichia index, and significant superiority for treatment T5 and T3 in the size standard of antibodies directed against Newcastle disease, while treatment T2 and T3 outperformed the size criterion of antibodies directed against camboro disease compared With the control treatment T1, and the second trial, the additional factors T2, T3, T4 and T5 achieved significant superiority (P<0.01) in all the immunological characteristics studied by treatment T1. It is concluded from this study that the addition of astaxanthin to the broiler meat diet led to an improvement in the immune characteristics of broilers raised under normal and elevated environmental temperatures.