Growth Performance and Carcass Quality Characteristics of Cobb 500 Broiler Chicken Fed Rations with Different Levels of Water Lily (Nymphae lotus) Seed Meal

Effect of feeding different levels of Water lily seed meal (WLSM) on broilers performance, carcass characteristics and meat quality traits was studied for six weeks. Four levels of WLSM (T1 = 0%; T2 = 3%; T3 = 6% and T4 = 9%) were compared using 120 Cobb 500 chicks; 3 pens/treatment and 10 chicks/pens. Measured parameters were feed intake and body weights. On day 49, two broilers from each pen were slaughtered for carcass evaluation. Broilers performance in terms of daily feed intake, average daily gain and feed conversion ratio (FCR) were calculated for each treatment diet. Daily feed intake of 105.9 g, 106.7 g, 107.9 g and 109.9 g were recorded for T1, T2, T3 and T4, respectively. Average daily gains (g) were 69.28 (T1), 70.75 (T2), 70.80 (T3) and 71.31(T4). The FCR rested in the range of 1.51-1.54. No difference (P>0.05) was observed in the growth performance of the birds among the inclusion spectrum used, however, the best overall performance was attained at 9% incorporation of WLSM (T4). Moreover, the highest mean weight of edible carcass like drumstick and thigh were obtained for birds fed on diet having the highest level of WLSM (T4). Breast from broilers fed the commercial diets containing WLSM contained less fat and more protein than the control group (P<0.05), which confirmed the highest carcass quality. Conclusively, the inclusion of different levels of WLSM in the commercial ration of Cob-500 broilers is successful without compromising their performance and the carcass parameters.

本研究为期六周，探究了不同添加水平的睡莲籽粕（Water lily seed meal, WLSM）对肉鸡生长性能、屠宰性状及肉品质性状的影响。试验选用120羽科宝500（Cobb 500）肉鸡，设置4个WLSM添加梯度组（T1=0%、T2=3%、T3=6%、T4=9%），每个处理组设置3个饲养重复栏，每栏饲养10羽肉鸡。测定指标包括采食量与体增重；于第49日龄时，从每栏选取2羽肉鸡进行屠宰以评估屠宰性能。同时计算各日粮处理组的日均采食量、平均日增重及料重比（feed conversion ratio, FCR）。试验结果显示，T1、T2、T3、T4组的日均采食量分别为105.9 g、106.7 g、107.9 g与109.9 g；平均日增重（单位：g）分别为69.28（T1）、70.75（T2）、70.80（T3）及71.31（T4）；料重比介于1.51~1.54之间。各WLSM添加水平组间肉鸡生长性能无显著差异（P>0.05），但以9%添加量的T4组整体生长表现最优。此外，饲喂最高WLSM添加水平日粮的T4组肉鸡，其可食用胴体组分（如琵琶腿与鸡大腿）的平均重量最高。与对照组相比，饲喂添加WLSM的商品日粮的肉鸡胸肉脂肪含量更低、蛋白质含量更高（P<0.05），表明该组肉鸡胴体品质最优。综上，在科宝500肉鸡的商品配合日粮中添加不同水平的WLSM，可在不影响肉鸡生长性能与胴体性状的前提下取得良好应用效果。