Growth responses, excreta quality, nutrient digestibility, bone development and meat yield traits of broiler chickens fed vegetable or animal protein diets

Abstract

This study was carried out to compare the performance of broilers fed diets containing only vegetable protein (VP) with birds that received an animal protein (AP) in their diets. Cobb 500 day-old male broiler chicks (n = 256) were randomly divided into four experimental groups. The two AP diets contained fish meal and soybean (SBF) and fish meal with canola (CMF); while the two VP diets contained predominantly soybean (SBM) or canola (CAN) meals. All diets were isoenergetic and isonitrogenous, and were pelleted, but amino acid levels were formulated on a total and not digestible basis. Feed intake up to 21 days was highest on the AP diets, and the lowest in the SBM treatment. Birds in the AP diet groups were significantly heavier at 21 days and 35 days than those on the VP diets. Up to 35 days, birds on AP diets had superior feed conversion ratio, while the CAN treatment was the poorest. Excreta moisture level was significantly higher in birds fed the VP diets than those on AP diets. Excreta pH and ammonia concentration were similar between treatments. Protein digestibility was higher in the AP than in the VP diets. Birds raised on VP diets had a significantly lower abdominal fat content than birds on the AP diets. Other meat characteristics measured in this experiment did not differ significantly. Bone development, in terms of breaking strength and latency-to-sit time, was significantly better on the AP diets than that of birds on the VP diets. The birds on the CMF diet had the longest tibia bone, while birds on SBM diet, the shortest. Total tibia ash content on the CMF diet was significantly increased, along with its iron and copper concentration, which were also significantly higher in birds on the same diet than the others. The responses of birds generally indicated that the AP diets were superior to the VP diets.________________________________________________________________________________

Gross responses and apparent ileal digestibility of amino acids and minerals in broiler chicken fed vegetable-based starter diets supplemented with microbial enzymes

“…Birds of the CMpredominant (T 2 ) diet groups consumed a significantly higher amount of feed than those fed the SBM-predominant (T 1 ) diets, regardless of enzyme supplementation. The results agree with the reports of previous studies (16,17,13). The reason for the greater feed consumption of broiler chickens on enzyme-supplemented diets may be a result of increased fiber digestion, as the fiber tends to create a gut fill.…”

Vegetable Waste Inclusion in Broiler Diets and its Effect on Growth Performance, Blood Metabolites, Immunity, Meat Mineral Content and Lipid Oxidation Status

“…Feeding commercial rations has supported the rapid growth rate broilers, but consumers often complain about poor juiciness and taste of chicken meat. Slowing the growth of commercial broilers has shown to improved meat quality and supplementing vegetable waste to slow down their growth rate, supplying only their maintenance requirements, without adding much to the production cost is an emerging trend (Hossain et al, 2013).…”

“…However, it should be also considered that vegetable sources contain numerous antinutritive factors (ANF), lower protein quality, lower digestibility and lower biological value compared with animal sources (Dublecz, 2003;Vieira et al, 2003) and can affect meat quality. Diets with vegetables may possibly be nutritionally inferior and broilers fed on such diets may or may not respond positively (Hossain et al, 2013).…”

Pengaruh Pemberian Pakan dengan Sumber Protein Berbeda terhadap Persentase Potongan Karkas dan Massa Protein Daging Ayam Lokal Persilangan

“…Protein merupakan bahan utama pembentukan karkas. Pemberian pakan dengan sumber protein hewani memberikan performa yang lebih baik dari nabati (Hossain et al, 2013), tetapi apabila kedua sumber protein tersebut diberikan secara bersamaan akan saling melengkapi, sehingga keseimbangan asam amino dapat tercapai. Ketersediaan protein dalam pakan sangat berkaitan dengan bobot akhir, hal ini karena protein berperan penting terhadap pembentukan karkas.…”

“…Hossain et al (2013) menyatakan bahwa penggunaan protein hewani dapat menghasilkan bobot badan yang lebih tinggi, hal ini karena sumber protein hewani memiliki kecernaan protein yang tinggi dan berperan dalam perkembangan tulang. Protein pakan berperan untuk pertumbuhan tulang, ayam membutuhkan nutrisi yang cukup untuk proses pertumbuhan tulang.…”