Standardized total tract digestibility of phosphorus in oilseed meals fed to growing pigs

Abstract Text: We determined the standardized total tract digestibility (STTD) of phosphorus (P) in 11 sources of oilseed meals fed to growing pigs. The test ingredients were sesame meal, 2 sources of soybean meal (SBM) produced in Korea (SBM-K1 and SBM-K2), SBM produced in India, high-protein distillers dried grains (HPDDG), perilla meal (PM), canola meal, copra meal (CM), corn germ meal (CGM), palm kernel expeller, and tapioca distillers dried grains. Experimental diets were formulated to contain each ingredient as a sole source of P and a P-free diet was also prepared to estimate the basal endogenous loss of P. Twelve barrows with an initial BW of 47.9 ± 2.6 kg were allotted to a 12 × 8 incomplete Latin square design with 12 diets and 8 periods. After 4 d of adaptation period, feces were collected for 4 d of collection period according to the marker-to-marker method. There was a difference (P < 0.001) in the STTD of P among oilseed meals (Table 1). Values for the STTD of P in SBM-K1, HPDDG, CM, and CGM were greater (P < 0.05) than that in PM. In conclusion, the STTD of P in oilseed meals were in the range of 58.5 to 76.8% except HPDDG, PM, and CGM.

Table 1. Phosphorus (P) and standardized total tract digestibility (STTD) of P in 11 sources of oilseed meals fed to growing pigs (% as-fed basis, n = 8)

Item	P	STTD of P
Ingredient
Sesame meal	0.63	58.5bc
Soybean meal-Korea   1	0.63	74.9ab
Soybean meal-Korea   2	0.57	58.6bc
Soybean meal-India	0.54	67.4abc
High-protein distillers dried grains	0.24	86.4a
Perilla meal	1.29	54.5c
Canola meal	0.99	61.9bc
Copra meal	0.56	76.9ab
Corn germ meal	0.53	82.6a
Palm kernel expeller	0.54	70.6abc
Tapioca distillers dried grains	0.23	70.8abc
SEM		4.7
P-value		< 0.001

^a,b,cWithin a column, means without a common superscript letter differ (P < 0.05).

Keywords: Feedstuffs, Macromineral, Swine