Ospina-Romero María A, Medrano-Vázquez Leslie S, Pinelli-Saavedra Araceli, Sánchez-Villalba Esther, Valenzuela-Melendres Martín, Martínez-Téllez Miguel Ángel, Barrera-Silva Miguel Ángel, González-Ríos Humberto
Centro de Investigación en Alimentación y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46, Col. La Victoria, Hermosillo 83304, Mexico.
Departamento de Agricultura y Ganadería, Universidad de Sonora, Carretera a Bahía de Kino km 21, Hermosillo 83000, Mexico.
Animals (Basel). 2023 Jul 24;13(14):2396. doi: 10.3390/ani13142396.
The effect of individual and combined supplementation of FA and GPM on physiological variables, productive performance, and carcass characteristics of finishing pigs under heat stress conditions were investigated. Forty Yorkshire × Duroc pigs (80.23 kg) were individually housed and randomly distributed into 4 groups under a 2 × 2 factorial arrangement ( = 10): Control (basal diet, BD); FA, BD + 25 mg FA; GPM, BD with 2.5% GPM; and MIX, BD with 25 mg FA and 2.5% GPM. Additives were supplemented for 31 days. The inclusion of FA or GPM did not modify rectal temperature and respiratory rate. There was an effect of the interaction on FI, which increased when only GPM was supplemented, with respect to Control and MIX ( < 0.05). Average daily gain (ADG) and feed conversion (FC) were not affected by treatments ( > 0.05). The inclusion of FA improved hot and cold carcass weight, while the addition of GPM decreased the marbling ( < 0.05) and tended to increase loin area ( < 0.10). GPM increased liver weight ( < 0.05). The addition of GPM and FA can improve some carcass characteristics under heat stress conditions. It is necessary to continue investigating different levels of inclusion of GPM and FA in finishing pigs' diets.
研究了在热应激条件下，单独和联合添加脂肪酸（FA）和葡萄糖氧化酶（GPM）对育肥猪生理变量、生产性能和胴体特性的影响。40头约克夏×杜洛克猪（体重80.23千克）单栏饲养，并按照2×2析因设计随机分为4组（每组10头）：对照组（基础日粮，BD）；FA组，基础日粮+25毫克FA；GPM组，基础日粮添加2.5% GPM；混合组，基础日粮添加25毫克FA和2.5% GPM。添加剂添加31天。添加FA或GPM对直肠温度和呼吸频率没有影响。交互作用对采食量有影响，仅添加GPM时采食量相对于对照组和混合组增加（P<0.05）。日增重（ADG）和饲料转化率（FC）不受处理影响（P>0.05）。添加FA提高了热胴体重和冷胴体重，而添加GPM降低了大理石花纹评分（P<0.05），并倾向于增加腰部面积（P<0.10）。GPM增加了肝脏重量（P<0.05）。在热应激条件下，添加GPM和FA可以改善一些胴体特性。有必要继续研究育肥猪日粮中GPM和FA的不同添加水平。
