Pereira Francisco Alves, Coelho Flavio Aguiar, Alves Laya Kannan Silva, Dos Santos Fernanda Mariane, Pereira Erick Marlon, Silva Neta Clarice Speridiao, Ferreira Felipe Norberto Alves, da Cunha Ana Caroline Rodrigues, Pairis-Garcia Monique Danielle, Garbossa Cesar Augusto Pospissil
Department of Nutrition and Animal Production, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Pirassununga-SP, 13635-900, Brazil.
Department of Technical Services, Agroceres Multimix, Rio Claro-SP, 13502-741, Brazil.
Transl Anim Sci. 2024 Aug 31;8:txae132. doi: 10.1093/tas/txae132. eCollection 2024.
Supplementing swine diets with phytase increases phosphorus release by approximately 50% from cereal phytates. The increase in phosphorus availability allows for a reduction in dietary phosphorus supplementation from mineral sources and decreases the environmental impact of pork production through a decrease in phosphorus excretion. Superdosing phytase has been reported to boost swine productivity, improve the digestibility of other nutrients, and mitigate the antinutritional effects of phytates. However, there are significant cost differences among phytase products. Bacterial phytases are considered more modern, often with a higher cost of inclusion. A study was conducted with 288 piglets that were 21 d of age and weighed 6.43 ± 0.956 kg. Pigs were divided into four groups. Each group of pigs was fed a different experimental diet varying in phytase source and level: fungal phytase () at 500 FTU/kg of diet, fungal phytase at 2,000 FTU/kg, bacterial phytase () at 500 FTU/kg, and bacterial phytase at 2,000 FTU/kg. No differences were found for phytase sources or doses on productivity at 14 and 21 d postweaning. However, piglets supplemented with 2,000 FTUs/kg of phytase in the diet during the first 21 d of nursery exhibited a 5.8% better feed conversion ( = 0.02). An interaction between phytase source and dose was observed for average live weight and daily weight gain over the 42-d nursery period ( < 0.05). Supplementing the diet with 2,000 FTU/kg of fungal phytase improved daily weight gain and live weight throughout the experimental period compared to piglets supplemented with 500 FTU/kg of the same phytase source. Additionally, it resulted in better final weights compared to piglets supplemented with 500 FTU/kg of bacterial phytase. Phytase inclusion at 2,000 FTU/kg improved feed conversion by 2.07% over the 42-d nursery period. The most economically favorable feed conversion ratios were observed when supplementing the diet with fungal phytase at 2,000 FTUs/kg.
在猪的日粮中添加植酸酶可使谷物植酸盐中磷的释放量增加约50%。磷利用率的提高使得矿物质来源的日粮磷添加量减少，并通过减少磷排泄降低了猪肉生产对环境的影响。据报道，超量添加植酸酶可提高猪的生产性能，改善其他营养物质的消化率，并减轻植酸盐的抗营养作用。然而，不同植酸酶产品的成本存在显著差异。细菌来源的植酸酶被认为更为先进，但其添加成本通常较高。本研究选用了288头21日龄、体重6.43 ± 0.956 kg的仔猪。将猪分为四组。每组猪饲喂不同的实验日粮，日粮中植酸酶来源和水平不同：真菌植酸酶（）500 FTU/kg日粮、真菌植酸酶2000 FTU/kg、细菌植酸酶（）500 FTU/kg和细菌植酸酶2000 FTU/kg。断奶后14天和21天时，未发现植酸酶来源或剂量对生产性能有差异。然而，在保育期的前21天，日粮中添加2000 FTUs/kg植酸酶的仔猪饲料转化率提高了5.8%（P = 0.02）。在42天的保育期内，观察到平均体重和日增重存在植酸酶来源与剂量的交互作用（P < 0.05）。与添加500 FTU/kg相同植酸酶来源的仔猪相比，日粮中添加2000 FTU/kg真菌植酸酶可提高整个实验期的日增重和体重。此外，与添加500 FTU/kg细菌植酸酶的仔猪相比，最终体重更高。在42天的保育期内，添加2000 FTU/kg植酸酶可使饲料转化率提高2.07%。当日粮中添加2000 FTUs/kg真菌植酸酶时，观察到最经济有利的饲料转化率。
