The effect of an adaptation period to soybean oil additions in the diets of young pigs.

Abstract

Utilization of soybean oil (SBO) in swine starter diets and the effect of an adaptation period to SBO on performance was studied in two 4-wk experiments with pigs initially 4 to 5 wk of age. One trial was extended an additional 4 wk and apparent DE was measured during the 4th wk postweaning. Corn-soybean meal-based diets were used in which SBO was substituted for cornstarch at 2, 4 and 6% of the diet in Exp. 1 and at 3 and 6% of the diet in Exp. 2. In Exp. 2, SBO was added either initially (adaptation) or after 2 wk (no adaptation). In Exp. 1 daily gain and efficiency of feed utilization were improved (P less than .05) by adding SBO during wk 3 and 4, but not earlier. Feed intake was not affected by treatment. In Exp. 2, for the initial 4-wk postweaning period, there was no effect of SBO addition on growth rate; feed intake was depressed (P less than .05) when SBO was added at wk 3, and efficiency of feed utilization was improved (P less than .05) for pigs fed SBO without an adaptation period. The primary improvements in performance occurred in the 3rd and 4th wk postweaning, with a tendency for pigs to perform better without an adaptation period. During wk 4, pigs adapted to SBO consumed more (P less than .05) feed but tended to be less efficient (P less than .10) than nonadapted pigs. With or without adaptation, apparent DE was unaffected by SBO additions. Regardless of adaptation period, SBO additions depressed feed intake (P less than .05) and improved efficiency of feed utilization (P less than .01) for the 5- to 8-wk growing phase. In conclusion, adding SBO the first 2 wk postweaning did not improve performance; an adaptation period was not necessary for a performance response from added SBO.

Effect of adding fat and(or) milk products to the weanling pig diet on performance in the nursery and subsequent grow-finish stages

“…6. The improvement in fat utilization with time postweaning is consistent with previous research (Cera et al, 1988b(Cera et al, , 1990bHoward et al, 1990, Li et al, 1990Øverland et al, 1993).…”

Effects of Dietary Fat Types on Growth Performance, Pork Quality, and Gene Expression in Growing-finishing Pigs

“…In many other reports, the addition of fat at the diet was known to improve feed efficiency during the post-weaning period (Cera et al, 1988; 1990; Howard et al, 1990; Li et al, 1990; Overland et al, 1993; Tokach et al, 1995). However, initial stage (from 0 to 14 d after weaning) was also no difference of feed efficiency.…”

Effect of emulsifier (lysophospholipids) on growth performance, nutrient digestibility and blood profile in weanling pigs

“…The addition of fat to the diet of weanling pigs has been reported to improve ADG and feed efficiency during the later stages primarily (Cera et al, 1990;Howard et al, 1990;Li et al, 1990). However, the digestion of dietary lipids is difficult by weanling pigs, especially during the early period after weanling (Cera et al, 1988;Li et al, 1990).…”