Cashew nut meal subjected to prolonged storage for quail feeding

ABSTRACT The objective of this study was to evaluate the oxidative stability of cashew nut meal (CNM) at 180 days of storage and the effects of its use in the feed of meat quails. A total of 280 animals at seven days of age, of both sexes, were distributed in a completely randomized design with five treatments, in a 2 × 2 + 1 factorial arrangement, and seven replicates of eight birds each. The treatments were a control diet without CNM and diets containing levels of 12.5 or 25% of new CNM (NCNM) or stored for 180 days (SCNM). The lipid oxidation of the brans was evaluated by determining the acidity index and peroxide index. The parameters evaluated were the quail performance, metabolizable coefficients and energy of diets, carcass characteristics, relative weights of the liver and pancreas, and bone parameters. The acidity of cashew nut meal was 4.66% and 6.16 (% in oleic acid) for NCNM and SCNM, respectively. Independent of the storage, inclusion of CNM resulted in higher metabolizable energy values in the diet, reduced intake, and, because weight gain did not vary, feed conversion improved compared with the control treatment. Carcass traits, relative weights of liver and pancreas, as well as bone growth and quality were not affected by dietary treatments. Despite the hydrolytic rancidity, CNM can be used in the diets for meat quails at up to 25% of inclusion.

摘要 本研究旨在评估腰果粕（cashew nut meal, CNM）在180天贮藏后的氧化稳定性，以及其在肉鹌鹑日粮中的应用效果。试验选取280只7日龄、雌雄兼具的肉鹌鹑，采用完全随机设计，设置5个处理组，采用2×2+1因子设计，每个处理设置7个重复，每个重复8只鹌鹑。处理组包括无腰果粕添加的基础日粮对照组，以及添加12.5%或25%新鲜腰果粕（new CNM, NCNM）、或贮藏180天的腰果粕（stored CNM, SCNM）的试验日粮。通过测定酸价与过氧化值，评价腰果粕的脂质氧化程度。本试验评估的参数包括肉鹌鹑生产性能、日粮代谢系数与代谢能、屠宰性状、肝脏与胰腺的相对重量，以及骨骼参数。结果显示，新鲜腰果粕与贮藏180天的腰果粕的酸值（以油酸计）分别为4.66%和6.16%。无论是否经过贮藏，添加腰果粕均可提高日粮代谢能值、降低采食量；由于体增重无显著变化，饲料转化率较对照组得到改善。屠宰性状、肝脏与胰腺相对重量，以及骨骼生长与品质均不受日粮处理的影响。尽管存在水解酸败现象，腰果粕仍可在肉鹌鹑日粮中以最高25%的比例添加使用。