绍兴鸭剩余采食量与部分生产性能及蛋品质的相关性分析

本实验旨在探讨绍兴鸭剩余采食量(RFI)与生产性能及蛋品质之间的关系。测定300只绍兴鸭410~470日龄的采食量、体重、平均蛋重、蛋品质,计算出剩余采食量与料蛋比,并分析剩余采食量与生产性能及蛋品质的相关性。结果显示:绍兴鸭平均采食量、平均蛋重、体重、体增重、料蛋比、剩余采食量分别为198.8 g/d、73.0 g、1500.9 g、2.5 g/d、2.7、3.5 g/d;低剩余采食量组的剩余采食量、采食量以及料蛋比极显著低于高剩余采食量组;相关性分析表明,剩余采食量与采食量和料蛋比呈极显著正相关(P<0.01);采食量与平均蛋重、体重呈极显著正相关(P<0.01),与料蛋比呈极显著负相关(P<0.01),与体增重呈显著正相关性(P<0.05);蛋品质分析结果表明,高剩余采食量组仅蛋黄色泽水平显著高于低剩余采食量组;相关性分析表明,剩余采食量与蛋品质各指标间均无显著相关性。本试验结果表明,以剩余采食量为蛋鸭选育指标是可行的,且选育低剩余采食量的鸭子能显著降低采食量,提高饲料效率,且不改变产蛋重及蛋品质。

Correlation Analysis of Residual Feed Intake and Part of Production Performance and Egg Quality in Shaoxing Duck

To analysis residual feed intake and its correlation with production performance and egg quality, we designed an experiment for Shaoxing ducks. Data comprised records from 300 Shaoxing ducks, feed intake(FI), body weight(BW), average egg weight(EML) and egg quality were measured individually for the ducks at 410-470 days old. We calculated RFI and ratio of feed to egg, then analyzed the correlation of RFI between production performance and egg quality. The average FI, EML, BW, gain weight(GW), ratio of feed to egg and RFI of Shaoxing duck were 198.8 g/d, 73.0 g, 1 500.9 g, 2.5 g/d, 2.7 and 3.5 g/d, respectively. The low residual feed intake group(LRFI) was significantly lower than the high residual feed intake group(HRFI)(P<0.01) in the RFI, FI and ratio of feed to egg. In regard of correlation analysis, RFI was significantly positively correlated with FI and ratio of feed to egg(P<0.01); FI was significantly positively correlated with EML and BW(P<0.01), and FI was significantly negatively correlated with ratio of feed to egg(P<0.01). There was a significant positive correlation between FI and GW(P<0.05). Egg quality analysis results showed that the Yolk color level of HRFI group was significantly higher than that of LRFI group(P<0.05), while LRFI was higher than HRFI in egg shape index, eggshell thickness, eggshell strength, protein height and Haugh unit, however, it did not reach a significant level; there was no significant correlation between RFI and egg quality indicators; eggshell thickness was significantly positively correlated with eggshell strength, average egg weight, protein height and Haugh units(P<0.01); At the same time, the eggshell strength was also significantly positively correlated with the average egg weight, protein height and Haugh unit(P<0.01). The results show that it is feasible to use RFI as a selection index. At the same time, ducks with LRFI that have no effect on egg production and quality can significantly reduce FI and improve feed efficiency.