The objective of the study was to determine the effects of dietary supplementation of fermented extruded corn stover on back fat thickness, reproductive performance and serum hormone in sows during late pregnancy. A total of 48 pregnant sows (24 Landrace and 24 Yorkshire) were randomly assigned into four experimental treatment groups (0%, 10%, 15% and 20% fermented extruded corn stover). Back fat thickness results showed that no significant differences on control group compared to each fermented treatment groups (P>0.05) at 55 and 105 days of gestation, respectively. Reproductive performance results demonstrated that control group had a lower litter size per head than 10% fermented extruded corn stover group (P<0.05), respectively. The results showed that leptin hormone was higher in control group than 10%, 15% and 20% treatment groups (P<0.05), respectively. Our findings suggested that 10% fermented extruded corn stover increased the litter size per head in pregnant sows.
Feed fiber composition is usually considered as one of the factors that have an impact on digestive tract microbiota composition. The investigations on the level of fermentation and in-vitro digestibility of different fibers are not well understood. The aim of the current study is to determine the effect of different fiber sources on intestinal nutrient digestibility, hindgut fermentation, and microbial community composition under in vitro conditions using pigs’ hindgut as a model. The experimental treatment diets contained alfalfa hay, cornstalk, and rice straw. Cornstalk treatment displayed higher digestibility compared to alfalfa hay and rice straw; similar results were observed with in-vitro digestibility using intestinal digesta. Firmicutes were the most abundant phyla (Firmicutes = 89.2%), and Lactobacillus were the prominent genera (75.2%) in response to alfalfa compared to rice straw and cornstalk treatments. In simulated in-vitro digestion, corn stalk fiber improved dry matter digestibility; rice straw fiber improved volatile fatty acid content and fermentation efficiency. Alfalfa fiber improved the thickness of deposited Firmicutes and Lactobacillus.
The study was conducted to determine the effect of fermented extruded corn stover on nutrient digestibility and milk composition in colostrum of pregnant sows. A total of 48 pregnant sows (24 Landrace and 24 Yorkshire) were randomly assigned into four experimental treatment groups (0, 10%, 15%, 20% fermented extruded corn stover). The results of nutrient digestibility (Table 2) showed that in crude protein and neutral detergent fibre, there were no significant differences between the control group and 10% fermented extruded stover (P > 0.05). However, these results in energy and acid detergent fibre showed a significant differences between control group and all the experimental groups (P > 0.05), respectively. In fat, lactose and non-fat solids, there were no significant differences between control group and experimental groups (P > 0.05), respectively. There was a significant difference in protein between control group and experimental group (P < 0.05). Our findings suggest that with the increase of fiber content in feed, protein and lactose content are increased in colostrum of pregnant sows and there is little effect on digestibility.
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