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Keywords

amylase, high amylase corn, yellow dent corn, swine

Abstract

A total of 288 pigs (Line 600 × 241, DNA, Columbus, NE; initially 91.5 lb) were used in an 82-d trial to determine if replacing conventional yellow dent corn with high amylase corn (Enogen®, Syngenta Seeds, LLC) in diets with or without distillers dried grains with solubles (DDGS) influences growth performance and carcass characteristics. Pens contained 8 pigs with an equal number of barrows and gilts. There were 9 pens per treatment with pens assigned randomly to treatments balancing for initial body weight. Diets were arranged in a 2 × 2 factorial with two corn sources (conventional or high amylase) and two levels of DDGS (0 or 25%). Experimental diets were fed in meal form in 3 phases: d 0 to 29, d 29 to 47, and d 47 to 82. Pigs were weighed approximately every 2 weeks and at the start of each phase. On d 82, pigs were transported to a commercial packing plant for processing and carcass data collection. Overall, average daily gain (ADG) was marginally greater (P<0.089) for pigs fed high amylase corn than conventional corn with no evidence for difference in feed intake, feed efficiency (F/G), hot carcass weight (HCW), or other carcass traits. Added DDGS resulted in decreased (P<0.026) overall ADG and poorer (P<0.047) F/G compared to pigs fed no DDGS. Pigs fed DDGS had marginally lower (P<0.086) HCW, less (P<0.045) backfat, and marginally greater (P<0.054) loin depth, (P<0.017) percentage lean, and (P<0.0001) iodine values than pigs not consuming DDGS. The results of this trial suggest that high amylase corn tended to improve overall ADG; however, F/G and carcass characteristics were unchanged between corn sources. Further research is needed to determine if this hybrid has positive effects on growth of younger pigs or pigs fed pelleted diets.

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