Effects of Sangrovit® Extra on Apparent Ileal Digestibility of Amino Acids, Crude Protein, Acid Hydrolyzed Ether Extract and Starch By Weanling Pigs Fed Corn-Soybean Meal Diets

An experiment was conducted to determine if inclusion of a preparation of benzo[c]phenanthridine alkaloids obtained from Macleaya cordata (Sangrovit^® Extra) in corn-soybean meal diets fed to weanling pigs increases the apparent ileal digestibility (AID) of AA, CP, starch, and acid hydrolyzed ether extract (AEE). Thirty-two ileal cannulated barrows (BW = 12.19 ± 1.38 kg) were allotted to a randomized complete block design with 4 diets and 8 replicate pigs per diet. Diets were supplemented with 0, 90, 180, or 360 mg/kg Sangrovit^® Extra and with 0.40% chromic oxide. Diets were fed for 27 d and ileal digesta were collected on d 13 and 14 (period 1) and on d 26 and 27 (period 2). Data were analyzed using Proc Mixed in SAS and effects of Sangrovit^® Extra inclusions were analyzed using contrasts statements with coefficients for unequally spaced treatments being generated using the Proc IML statement in SAS. Differences between periods were analyzed using a repeated measures statement. Results indicated that a quadratic increase (P < 0.05) in the AID of Thr, Trp, and Val was observed in period 1 (Table 1), and AID for CP, Arg, His, Ile, Leu, Met, Phe, Thr, Trp, Val, Cys, Pro, and Tyr was greater in period 2 than in period 1 (P < 0.05). In period 1, a quadratic increase (P < 0.05) was observed for the AID of starch as Sangrovit^® Extra increased in the diet, but the AID of starch was less (P < 0.05) in period 2 than in period 1 (i.e., 92.9, 94.7, 93.8, and 91.6% in period 1 and 90.8, 93.2, 91.3, and 90.9% in period 2). No differences among treatments or periods were observed for AID of AEE. Results indicate that approximately 90 mg/kg of Sangrovit^® Extra is optimum for AID of starch and AA.

Table 1. Effect of Sangrovit^® Extra on AID of AA and starch in period 1 of the experiment

Item, %	-1	901	1801	3601	SEM	P-value quadratic	P-value period
Starch	92.9	94.7	93.8	91.6	0.593	0.004	0.001
Lys	80.0	81.0	80.6	79.6	1.030	0.407	0.335
Met	85.1	86.6	85.6	83.4	0.771	0.082	0.043
Thr	71.2	75.0	72.4	69.7	1.096	0.012	0.008
Trp	80.7	81.2	81.8	78.4	0.844	0.042	0.001
Val	76.8	79.5	78.1	76.2	0.919	0.034	0.008

¹Inclusion of Sangrovit^® Extra in diets (mg/kg).