断奶压力是养猪场最常见的问题,这增加了死亡率和发病率。使用人造光是改变免疫系统和代谢途径的一种选择。本研究旨在评估超弱光(Photonia)对生长性能的影响,断奶猪的免疫系统和新陈代谢,以及断奶后生长阶段对生长绩效的结转效应。将平均初始体重为7.06±0.11kg(年龄:21天)的总共30只断奶的猪分配了两次处理(对照和Photonia),重复15次。在包括第1阶段(第0-14天)的三个阶段为猪制备颗粒状饮食。第2阶段(第15-28天)和第3阶段(第29-48天)。在Photonia治疗中,猪的增食比(G:F)明显更大。在第28天,在光带猪中观察到较高浓度的免疫球蛋白A(IgA)(p<0.01)和IgG(p<0.01)。在第48天,Photonia治疗显示更高的血清IgA(p<0.01)和IgG(p<0.05)。在Photonia治疗中白细胞介素(IL)-6的浓度降低(p<0.05)。在第48天,肿瘤坏死因子-α的浓度,在Photonia治疗中,猪血清中的IL-1β和IL-6降低(p<0.05)。代谢途径分析显示,光子治疗增加了d-谷氨酰胺,d-谷氨酸,丙氨酸,天冬氨酸,谷氨酸和苯丙氨酸与对照处理相比。总之,由于改进的G:F,建议断奶猪使用Photonia,免疫状态和氨基酸代谢途径的激活,包括D-谷氨酰胺,d-谷氨酸,丙氨酸,天冬氨酸,谷氨酸和苯丙氨酸.
Weaning stress is the most common issue in swine farms, which increases mortality and morbidity. The use of artificial light is an option for modifying the immune system and metabolic pathways. This study aimed to evaluate the influence of ultraweak light (Photonia) on growth performance, immune system and metabolism of weanling pigs, and the carry-over effect on the growth performance in postweanling growing stages. A total of 30 weaned pigs with an average initial body weight of 7.06 ± 0.11 kg (age: 21 days) were allotted two treatments (Control and Photonia) with 15 replicates. The pelleted form diets were prepared for pigs in three phases including phase 1 (Days 0-14), phase 2 (Days 15-28) and phase 3 (Days 29-48). The gain-to-feed ratio (G:F) of pigs was significantly greater in the Photonia treatment. On Day 28, a higher concentration of immunoglobin A (IgA) (p < 0.01) and IgG (p < 0.01) was observed in the Photonia pigs. On Day 48, the Photonia treatment showed a greater serum IgA (p < 0.01) and IgG (p < 0.05). The concentration of interleukin (IL)-6 was decreased (p < 0.05) in the Photonia treatment. At Day 48, the concentrations of tumour necrotic factor-α, IL-1β and IL-6 in serum were decreased (p < 0.05) in pigs in the Photonia treatment. Metabolic pathways analysis showed that the Photonia treatment increased the d-glutamine, d-glutamate, alanine, aspartate, glutamate and phenylalanine compared with the control treatment. In conclusion, the use of Photonia for weanling pigs is recommended due to improved G:F, immune status and activation of amino acids metabolic pathways including d-glutamine, d-glutamate, alanine, aspartate, glutamate and phenylalanine.