仔猪初生重对育肥期生长性状及采食性状的影响

本试验旨在研究杜洛克种公猪初生重对其育肥期生长性状和采食性状的影响。选取230头杜洛克仔猪,按初生重分为高初生重组和低初生重组,在同一饲养标准下饲养至(100±5)kg体重,记录生长性状和采食性状表型数据,用于后续分析。结果表明:高初生重组的30～100 kg日增重、达到100 kg体重时眼肌面积、瘦肉率、体长、体高和管围等生长性状均显著高于低初生重组(P<0.05);而低初生重组的体重达100 kg所用时间显著长于高初生重组(P<0.01);而高初生重组的100 kg体重背膘厚和100 kg体重肌内脂肪含量与低初生重组无显著差异(P>0.05);高、低初生重组的平均日采食量、日采食时间、日采食次数、平均每次采食时间、平均每次采食量和平均采食速率等采食性状无显著差异(P>0.05);低初生重组在30～100 kg的耗料增重比极显著高于高初生重组(P<0.01)。高初生重的杜洛克仔猪相较于低初生重仔猪在育肥期表现出更快的生长速度和更低的耗料增重比,且体尺特征更加优秀。

Effect of Duroc Birth Weight on Their Growth and Feeding Traits in Fattening Stage

This experiment was conducted to study the effect of Duroc birth weight on their growth and feeding traits in fattening stage. We selected 230 experimental Duroc male piglets and divided them into high-and low-birth weight groups according their birth weight values. They were raised under the same commercial formula diet, man-controlled farm conditions and management manners. The growth and feeding traits of Duroc pigs were recorded and used for subsequently one-way anova test when their body weight at a range of(100±5)kg. Results showed that pigs in high birth weight group had significantly higher growth trait, which include daily gain during weight form 30 to 100 kg, loin muscle area, lean meat percentage, body length, body height and tube circumference at the weight of 100 kg compared to individuals in low birth weight group(P<0.05). The low birth weight pigs had longer period to reach 100 kg(P<0.01) than high birth weight pigs. The pigs from low birth weight group had higher feed conversion ratio than the pigs form high birth weight group when their body weight range from 30～100 kg(P<0.01). Duroc piglets with high birth weight showed higher growth rate, feed efficiency and better body measurement features than the pigs with low birth weight during fattening stage.