Two experiments were conducted in this study to investigate the effects of dietary fiber supplemented level from purified cellulose on the estimation of endogenous phosphorus (P) loss (EPL), and standardized ileal digestibility (SID) and standardized total tract digestibility (STTD) of P in corn-soybean meal diets for growing pigs. Twenty-eight growing pigs with initial body weight of (25.1±2.0) kg were surgically fitted with simple T-cannulas at the distal ileum. According to a completely randomized design, the pigs were assigned to 4 groups with 7 replicates in each group and 1 pig in each replicate. In experiment 1, four groups were assigned to P-free diets containing 4 levels of purified cellulose supplementation [0 (control), 3%, 6% and 9%]. In experiment 2, four groups were assigned to corn-soybean meal diets containing 4 levels of purified cellulose supplementation [0 (control), 3%, 6% and 9%]. In two experiments, the experimental period consisted of a 5 days pre-test period, 2 days for feces collection on days 6 and 7, and 2 days for ileal digesta collection on days 8 and 9. Chromic oxide was included in diets to determine basal EPL and apparent digestibility of P. The results showed that the estimates of basal EPL for total tract of pigs was linearly decreased with dietary fiber supplemented level from purified cellulose (P<0.05). The apparent ileal digestibility (AID), SID and STTD of P in diets were linearly decreased with increasing fiber supplemented level (P<0.05 or P<0.01). In conclusion, under the condition of this experiment, the suitable addition level of cellulose is 3% to 6% in P-free diets for growing pigs, and no add recommend for the corn-soybean meal diet. Dietary fiber supplemented level significantly influence the determination of EPL for growing pigs, and P digestibility in corn-soybean meal diets.
LYU Shuaibing
,
LIU Zhengqun
,
WANG Yuming
,
LIU Jingbo
,
ZHANG Hongfu
,
ZHANG Shiyuan
. Effects of Dietary Fiber Supplemented Level on Determination of Standardized Digestibility of Phosphorus for Growing Pigs[J]. Chinese Journal of Animal Nutrition, 2016
, 28(1)
: 117
-124
.
DOI: 10.3969/j.issn.1006-267x.2016.01.016
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