Một số đặc điểm ngoại hình và năng suất sinh sản của đàn sản xuất gà H’re nuôi tại tỉnh Quảng Ngãi

Abstract

The study was conducted to evaluate the morphological characteristics and reproductive performance of a H’re chicken production flock raised in Quang Ngai province. A total of 4,005 H’re chickens were monitored from 1 day of age to 20 weeks of age to assess morphological characteristics. At 20 weeks of age, a selected flock of 1,500 hens and 200 roosters were used to evaluate reproductive traits until 72 weeks of age. The results showed that newly hatched chicks exhibited diverse plumage colors, with black dorsal and yellow ventral feathers accounting for the highest proportion (79.68%). By 8 weeks of age, the proportion of black plumage ranged from 81.48 to 86.59%, and by 20 weeks, most birds exhibited the breed’s characteristic black plumage (100% in males and 99.21% in females), with predominantly slate-colored shanks and beaks. H’re chickens started laying at 20 weeks of age, reaching peak production at 33 weeks of age. The average laying rate was 18.73% during 20–72 weeks of age, with a cumulative egg production of 69.68 eggs per hen. The average egg weight was 41.24 g, and the Haugh unit reached 74, indicating good egg quality. The fertility rate was 90.8%, hatchability of fertile eggs was 81.2%, and the proportion of chicks selected for rearing was 94.9%. The findings indicated that the H’re production flock exhibited stable plumage, shank, and beak coloration. Although egg production and egg weight were relatively low, fertility, hatchability, and chick selection rates were higher compared to other indigenous chicken breeds.