|
KMID : 1025520210630040827
|
|
Journal of Animal Science and Technology
2021 Volume.63 No. 4 p.827 ~ p.840
|
|
|
Prediction of calcium and phosphorus requirements for pigs in different bodyweight ranges using a meta-analysis
|
|
Jeon Se-Min
Hosseindoust Abdolreza
Ha Sang-Hun
Kim Tae-Gyun
Mun Jun-Yong
Moturi Joseph
Lee Su-Hyup
Choi Yo-Han
Lee Sang-Deok
Sa Soo-Jin
Kim Jin-Soo
|
|
|
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.
|
|
|
KEYWORD
|
|
|
Phytase, Weanling, Growing, Crude protein, Digestibility, Meta-analysis
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|