Weilei Yao, Xinhong Yu, Yan Zhou, Yanxu Han, Shimin Li, Xinyi Yin, Xinlei Huang, Feiruo Huang
The present study was conducted to assess the effect of different
processing techniques of broken rice on processing quality of pellet feed,
growth performance, nutrient digestibility, blood biochemical parameters, and
fecal microbiota of weaned piglets. A total of 400 crossbred piglets (Duroc × Landrace × Yorkshire) with a mean
initial body weight (BW) of 7.24 ± 0.52 kg were used in a 28-d experiment. Piglets were randomly distributed to one of 4 treatment
and 10 replicate pens per treatment, with 10 piglets per pen. The dietary
treatments were as follows: CON, corn as the main cereal type in the dietary;
BR, 70% of the corn replaced by broken rice; ETBR, 70% of the corn replaced by
extruded broken rice; EPBR, 70% of the corn replaced by expanded broken rice. Extruded
broken rice and expanded broken rice supplementation significantly
(P < 0.05) increased hardness, pellet durability index, crispness, and
starch gelatinization degree. Extruded broken rice and expanded broken rice
generated a higher (P < 0.05) average daily feed intake, increased
(P < 0.05) average daily gain, decreased (P < 0.05) feed conversion
ratio, and lowered (P < 0.05) the diarrhea rate. Piglets fed extruded broken
rice displayed high apparent total tract digestibility levels of dry matter
(P < 0.05), gross energy (P < 0.05), crude protein (P < 0.05), and organic
matter (P < 0.05). In addition, extruded broken rice and expanded broken
rice supplementation had increased Lactobacillus and Bifidobacterium levels in
gut, whereas a lower abundance of the potential pathogens
Clostridium_sensu_strictio_1 and Streptococcus was observed. Dietary
supplementation of extruded broken rice and expanded broken rice failed to show
significant effects on blood biochemical parameters. Combined, 70% corn
substituted with broken rice failed to show significant effects. Collectively,
extruded broken rice and expanded broken rice supplementation had positively
enhanced the pellet quality, growth performance, nutrient digestibility, and
gut microbiota of weaned piglets.
2023, JAS, 101: skad158
https://doi.org/10.1093/jas/skad158
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