Orzo nudo invece del mais meglio con enzimi

[Autom. eng. transl.] A study was carried out to evaluate the effect of 2 varieties of bare barley with or without the addition of an enzymatic complex for non-starch polysaccharides (NSP) β-glucanase and xylanase), on the growth performance of weaned piglets in one study lasting 42 days. The study was conducted on 140 piglets (PIC x Duroc). The piglets were bred in cages (4 castrated males and 4 females per cage) according to live weight and sex and assigned to 5 experimental diets with 4 cages of castrated males and 3 of females for treatment. 5 isoenergetic and isoprotein diets were compared: 1) corn-based control diet (CTR); 2) CTR diet replaced by Astartis variety barley (AS); 3) CTR diet replaced by AS and addition of an enzyme complex for NSP (ASE); 4) CTR diet replaced by Alamo variety barley (AL); and 5) CTR diet replaced by AL with addition of an enzyme complex for NSP (ALE). The diets were formulated to cover or exceed the nutrient requirements and were offered in 2 phases, from 0 to 14 and from 14 to 42. At the end of the study the pigs that received the AS and AL diets had equal weights compared to those of CTR. The pigs that received naked barley diets had higher (P <0.05) increments during the P2 phase and during the whole test, higher final weights at 42, and better conversion indices during the P2 phase compared to the pigs that received the CTR diet. Pigs receiving diets with ASE and ALE enzymes had higher (P <0.05) ingestions during the P2 phase and better increases than those of AS and AL diets without enzymes. Increases in increments during the P2 phase and in the final weight due to the addition of the enzyme complex were greater for pigs fed the AS diet than for the AL diet (barley interaction x enzyme, P <0.05). On the other hand, the enzyme complex increased food efficiency in pigs with an AS diet during phase P2 and during the whole trial but had modest effects on the animals receiving the AL diet (barley x enzyme, P <0.05). In conclusion, the varieties of bare barley with or without the enzyme complex are ingredients that can replace cornmeal in whey-fed diets, with equal or better performace with the addition of enzymes. The addition of an enzyme complex for the best use of NSPs improves the growth performance of pigs receiving the AS diet more than those of the AL variety.