THE EFFECT OF TEMPERATURE, HUMIDITY REGIMES, AND EGG TURNING FREQUENCY ON EMBRYONIC DEVELOPMENT DURING POULTRY EGG INCUBATION

Khaitboev Ulugbek Norboy ugli; Tulaganova Umida Tolibjon qizi; Yangiboev Abdimalik Eshmurodovich; Kholbutaev Ilyosjon Rustam ugli

Authors

Khaitboev Ulugbek Norboy ugli Master’s Student at the Tashkent Branch of Samarkand State University of Veterinary Medicine, Livestock and Biotechnology
Tulaganova Umida Tolibjon qizi Master’s Student at the Tashkent Branch of Samarkand State University of Veterinary Medicine, Livestock and Biotechnology
Yangiboev Abdimalik Eshmurodovich Doctor of Agricultural Sciences (DSc) at the Tashkent Branch of Samarkand State University of Veterinary Medicine, Livestock and Biotechnology
Kholbutaev Ilyosjon Rustam ugli Candidate of Agricultural Sciences (PhD) at the Tashkent Branch of Samarkand State University of Veterinary Medicine, Livestock and Biotechnology

Keywords:

Incubation, emperature, humidity, egg turning, embryo development, hatchability, poultry.

Abstract

This study investigates the influence of incubation temperature, humidity regimes, and egg turning frequency on embryonic development, hatchability, and post-hatch performance of broiler chickens. Three experimental groups were established using 900 fertilized Cobb-500 eggs. Hatchability, embryo mortality, chick weight, and yolk absorption were assessed. Optimal development was observed at 37.8°C, relative humidity of 55–60% during the first 18 days and 65–70% during the last 3 days, with eggs turned five times per day. Deviations from these parameters reduced hatchability and chick quality.