Comparative studies on the responses of red jungle fowl and commercial broilers to nutritional manipulations

Abstract

Beberapa eksperimen telah dijalankan untuk membandingkan gerak balas ayam hutan merah (RJF) dan ayam pedaging komersial (CB) terhadap makanan secara pilihan dan makanan asas yang mengandungi hampas isi rung kelapa sawit (PKC), Ciri-ciri yang diamati meliputi prestasi pertumbuhan, protein dan tenaga yang dimakan, sifat-sifat karkas, tingkah laku, nisbah heterofil: limfosit, mikroflora dan morfologi permukaan usus. Penilaian sifat-sifat karkas pada berat badan yang sama (800 g) menunjukkan RJF lebih berat dari segi keseluruhan karkas dibandingkan dengan CB. Berat otot dan nisbah otot kepada tulang bagi bahagian. tersebut juga lebih tinggi pada RJF. Otot-otot bahagian dada dan paha RJF mempunyai mutu yang lebih baik dari segi kandungan protein, lemak dan kolesterol pada umur dan berat badan yang sama (56 hari, 800 g) dibandingkan dengan CB.

Experiments were conducted to compare the responses of the red jungle fowl (RJF) and commercial broiler chicken (CB) to choice feeding and dietary palm kernel cake (PKC). Traits measured were growth performance, protein and energy intakes, carcass characteristics, behaviour, heterophil/lymphocyte ratio, gut microflora and intestinal morphology. Evaluation of carcass characteristics at a common body weight (800 g) showed that RJF had heavier whole breast, thigh and drumstick than CB. Similarly, the muscle weight and muscle to bone ratio of those portions were greater in the former. The muscles of the breast and leg portions of RJF were of better quality than CB in term of protein, fat and cholesterol contents at a common body weight and at a common age (56 days old).