The Effect of High Stocking Density and Dietary Protein Levels on Blood Profiles, Intestinal Bacteria, Some Immunological Parameters, Status Antioxidant, and Performance in Native Chickens
The Effect of High Stocking Density and Dietary Protein Levels on Blood Profiles, Intestinal Bacteria, Some Immunological Parameters, Status Antioxidant, and Performance in Native Chickens
Franciscus Rudi Prasetyo Hantoro1,2,*, Dwi Sunarti1, Turrini Yudiarti1, Sri Sumarsih1, Rini Nurhayati2
ABSTRACT
This study aimed to investigate the effects of high stocking density and crude protein levels on blood parameters, bacterial populations, immune organs, antioxidant status, and growth performance in Sentul Selection (SenSi) 1 Agrinak chickens. Treatments consisted of three stocking densities (10, 14, and 18 birds/m2) and three levels of crude protein (14, 16, and 18%) factorially (3×3) which were arranged in nine treatments and four replications. Treatment and data collection were carried out at the age of 29-70 days. Data were analyzed using ANOVA with a factorial Group Random Design. The results showed that stocking density and crude protein levels had no impact on the blood profile, number of lactic acid bacteria (LAB) and coliforms in the cecum, weight of the bursa fabricius and spleen, levels of malondialdehyde (MDA), number of Newcastle Disease Virus (NDV) antibodies, increase in body weight, and feed efficiency. High stocking density has a significant impact on increasing the number of LAB and coliforms in the ileum, reducing the weight of the thymus, and reducing the amount of feed consumed. The lower the crude protein level, the lower the NDV antibody titres, but it did not affect the blood profile, LAB and coliform numbers, lymphoids, MDA levels, or growth performance. It was concluded that high stocking densities and reduced crude protein levels have the potential to harm health but do not affect the growth performance of Sensi 1 Agrinak chickens.
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