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Keywords

soy protein products, soybean meal, HP 300, nursery pigs

Abstract

A total of 480 nursery pigs (PIC C-29 × 359, initially 12.9 lb) were used in a 38-d growth trial to determine the effects of soy protein sources on pig performance. There were 10 pigs per pen and 8 replications per treatment. The 6 dietary treatments were a negative control, corn-soybean meal-based diet (30.1% soybean meal), and diets containing five different specialty protein sources including: Nutrivance, HP 300, soy protein concentrate (SPC), or NF8 or fish meal replacing 10% of the soybean meal in the negative control diet. Experimental diets were fed in two phases (5 lb per pig on d 0 to approximately d 14 and d 14 to 24) with a common diet fed from d 24 to 38. Diets contained 25 and 10% dried whey in phases 1 and 2, respectively. From d 0 to 14, pigs fed diets containing Nutrivance or NF8 had greater (P < 0.05) ADG than pigs fed the negative control, high SBM diet. Also, pigs fed the NF8 diet had greater (P < 0.05) ADG than pigs fed diets containing SPC or fish meal. The growth response was a result of greater (P < 0.05) ADFI for pigs fed the Nutrivance diet and improved (P < 0.05) feed efficiency for the NF8 diet. From d 14 to 24, pigs fed the diets containing fish meal or HP 300 had greater (P < 0.05) ADG than pigs fed NF8, with pigs fed NF8 having poorer (P < 0.05) F/G compared with pigs fed all other treatments. From d 0 to 24, pigs fed the diet containing HP 300 had greater (P < 0.05) ADG than pigs fed the negative control, high SBM diet, with other treatments being intermediate. Pigs fed the diet containing HP 300 had improved (P < 0.05) F/G compared with pigs fed all other protein sources except fish meal. Pigs fed the fish meal diet also had improved (P < 0.05) F/G compared with pigs fed the diet containing NF8. The improvement in performance from d 0 to 14 for pigs fed the diet containing Nutrivance resulted in a 0.5 lb heavier (P < 0.05) pig on d 14 as compared to the negative control diet. The 0.5 lb advantage in BW over the negative control was maintained to the end of the trial (d 38) and was similar to the final BW of pigs fed the HP 300 diet; however, the weight advantage was no longer statistically significant.

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