Prediction of calcium and phosphorus requirements for pigs in different bodyweight ranges using a meta-analysis

Jeon, SeMin and Hosseindoust, A. and Ha, SangHun and Kim, TaeGyun and Mun, JunYong and Moturi, J. and Lee, SuHyup and Choi, YoHan and Lee, SangDeok and Sa, SooJin and Kim, JinSoo

Journal of Animal Science and Technology (2021) 63: 827–840

DOI: 10.5187/jast.2021.e70

Abstract

Several studies have focused on Ca and P requirements for pigs. These requirements are estimated from their retention and bone formation. However, modern pig breeds have different responses to dietary Ca and P than traditional breeds, and their requirements are expected to change on an annual basis. Besides individual Ca and P needs, the Ca to P ratio (Ca/P) is an important factor in determining requirements. This study aimed to implement a linear and quadratic regression analysis to estimate Ca and P requirements based on average daily gain (ADG), apparent total tract digestibility (ATTD) of Ca (ATTD-Ca), ATTD of P (ATTD-P), and crude protein (CP) digestibility. Results show that Ca/P had linear and quadratic effects on ADG in the phytase-supplemented (PS) group in both the 6-11 kg and 11-25 kg categories. In the latter category, the CP digestibility was linearly increased in response to increasing Ca/P in the without-phytase (WP) group. In the 25-50 kg category, there was a linear response of ADG and linear and quadratic responses of CP digestibility to Ca/P in the PS group, while a linear and quadratic increase in CP digestibility and a quadratic effect on ATTD-Ca were observed in the WP group. In the 50-75 kg category, Ca/P had significant quadratic effects on ADG in the PS and WP groups, along with significant linear and quadratic effects on ATTD-Ca. In addition, Ca/P had significant quadratic effects on ATTD-P and led to a significant linear and quadratic increase in the CP digestibility in the WP group. In the 75-100 kg category, analysis showed a significant decrease in ATTD-Ca and ATTD-P in the PS and WP groups; in the latter, ATTD-P and ATTD-Ca were linearly decreased by increasing Ca/P. In conclusion, our equations predicted a higher Ca/P in the 6-25 kg bodyweight categories and a lower Ca/P in the 50-100 kg category than that recommended in the literature.

Citation

Jeon, S. M., Hosseindoust, A., Ha, S. H., Kim, T. G., Mun, J. Y., Moturi, J., Lee, S. H., Choi, Y. H., Lee, S. D., Sa, S. J., & Kim, J. S. (2021). Prediction of calcium and phosphorus requirements for pigs in different bodyweight ranges using a meta-analysis. Journal of Animal Science and Technology, 63(4), 827–840. https://doi.org/10.5187/jast.2021.e70 prediction, hogs, pigs, swine, meta-analysis, Animal Nutrition (Production Responses) [LL520], liveweight gain, liveweight gains, Animal Nutrition (Physiology) [LL510], diets, Mathematics and Statistics [ZZ100], body weight, Meat Producing Animals [LL120], data analysis, crude protein, regression analysis, feed additives, digestibility, nutrient requirements, bones, phosphorus, Feed Additives [RR130], pig feeding, phytases, calcium, dietary standards, food requirements, nutritional requirements, bone calcification, bone formation, linear models, ranges, retention

Keywords

• prediction
• hogs
• pigs
• swine
• meta-analysis
• Animal Nutrition (Production Responses) [LL520]
• liveweight gain
• liveweight gains
• Animal Nutrition (Physiology) [LL510]
• diets
• Mathematics and Statistics [ZZ100]
• body weight
• Meat Producing Animals [LL120]
• data analysis
• crude protein
• regression analysis
• feed additives
• digestibility
• nutrient requirements
• bones
• phosphorus
• Feed Additives [RR130]
• pig feeding
• phytases
• calcium
• dietary standards
• food requirements
• nutritional requirements
• bone calcification
• bone formation
• linear models
• ranges
• retention