Matshogo T B, Mlambo V, Marume U, Sebola N
Department of Animal Science, Faculty of Agriculture, Science and Technology, North-West University, P Bag x2046, Mmabatho, 2735, South Africa.
Food Security and Safety Niche area, Faculty of Agriculture, Science and Technology, North-West University, P Bag x2046, Mmabatho, 2735, South Africa.
Trop Anim Health Prod. 2018 Dec;50(8):1787-1795. doi: 10.1007/s11250-018-1620-9. Epub 2018 May 22.
Lippia javanica leaves may have nutraceutical bioactivity and thus could be a viable alternative to antibiotic growth promoters in poultry diets. To test this hypothesis, a feeding trial was carried out to determine the effects of dietary inclusion of Lippia javanica leaf meal (LJ) on growth performance, blood parameters, carcass characteristics and meat quality of indigenous Potchefstroom Koekoek (PK) chickens. The leaf meal was used to dilute a commercial chicken grower diet at a rate of 25 or 50 g/kg diet. Two additional experimental diets, a positive control (commercial chicken grower diet with antibiotics, CON+) and a negative control (commercial chicken grower diet without antibiotics, CON-), were also formulated. Feed intake and growth performance were measured over a period of 13 weeks before slaughtering for carcass and meat quality measurements. Blood was collected in week 11 to determine haematological and serum biochemical parameters. Diet had no effect on overall FCE but significantly (P < 0.05) affected bilirubin, alanine aminotransferase (ALT), aspartate transaminase (AST), sodium, potassium, cholesterol and magnesium levels in blood. When included at 50 g/kg, LJ increased carcass weight (P < 0.05). Meat from CON- (6.07) and LJ50 (6.08) chickens had a higher pH than from CON+ (5.9) and LJ25 (5.8) chickens. Breast muscle in CON- chickens had higher (P < 0.05) lightness (L*) value (53.2) compared to chickens fed on other diets. It was observed that meat from LJ25 chickens had the highest for redness value (2.3). It was concluded that L. javanica leaf meal can be included up to 50 g/kg in Potchefstroom koekoek chicken diets without causing negative effects on the birds' feed intake, utilisation and weight gain. Diet-induced changes observed in blood parameters and meat quality fell within the expected normal ranges for indigenous chickens.
爪哇过江藤叶可能具有营养保健生物活性，因此有望成为家禽日粮中抗生素生长促进剂的可行替代品。为验证这一假设，进行了一项饲养试验，以确定日粮中添加爪哇过江藤叶粉（LJ）对本土波切夫斯特鲁姆科伊科伊鸡（PK）生长性能、血液参数、胴体特性和肉质的影响。叶粉以25或50克/千克日粮的比例用于稀释商业肉鸡生长日粮。还配制了另外两种试验日粮，一种是阳性对照（含抗生素的商业肉鸡生长日粮，CON+）和一种阴性对照（不含抗生素的商业肉鸡生长日粮，CON-）。在屠宰前13周内测量采食量和生长性能，以进行胴体和肉质测量。在第11周采集血液，以测定血液学和血清生化参数。日粮对总体饲料转化率没有影响，但显著（P<0.05）影响血液中的胆红素、丙氨酸转氨酶（ALT）、天冬氨酸转氨酶（AST）、钠、钾、胆固醇和镁水平。当以50克/千克的比例添加时，LJ增加了胴体重（P<0.05）。CON-（6.07）和LJ50（6.08）组鸡的肉pH值高于CON+（5.9）和LJ25（5.8）组鸡。与其他日粮喂养的鸡相比，CON-组鸡胸肌的亮度（L*）值更高（P<0.05）（53.2）。观察到LJ25组鸡的肉红色值最高（2.3）。得出的结论是，在波切夫斯特鲁姆科伊科伊鸡日粮中，爪哇过江藤叶粉的添加量可达50克/千克，而不会对鸡的采食量、利用率和体重增加产生负面影响。日粮引起的血液参数和肉质变化在本土鸡预期的正常范围内。
