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- W2393278081 abstract "This experiment was conducted to study the effect of different nicotinamide(NAM) supplement levels on fermentation in vitro of lactating dairy cows,and tried to study its mechanism in affecting production performance.Three lactation Holstein cows fitted with permanent rumen cannula were used to provide rumen fluid in vitro,basal diet was used as fermentation substrate.It was designed as randomized experiment of single factor into five treatments with three replicates.The treat of control group(group A) was added the basal diet as fermentation substrate and the treats in other groups were added the basal diet supplemented with 3(group B),6(group C),9(group D) and 12 mg/100 g(group E) NAM,respectively.The results showed that,4 h later,pH was not changed significantly(P0.05),after 8 h,the group of control and adding 12 mg/100 g NAM were significantly decreased in unnormal levels(P0.05).Parasite protein concentration of the groups of adding 9 and 12 mg/100 g NAM were significantly lower than the control group,while the groups of adding 3 and 6 mg/100 g NAM group were numerically higher than the control group,but the difference was not significant(P0.05).These results indicated that adding 6 mg/100 g NAM can maintain normal pH for rumen microbial growth,especially for the growth of rumen protozoa,and that may explain why adding NAM can increase the production performance,and the suggested optimal level for rumen fermentation in vitro was 6 mg/100 g." @default.
- W2393278081 created "2016-06-24" @default.
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- W2393278081 date "2012-01-01" @default.
- W2393278081 modified "2023-09-23" @default.
- W2393278081 title "EFFECT OF DIFFERENT NICOTINAMIDE SUPPLEMENT LEVELS ON FERMENTATION IN VITRO OF LACTATING DAIRY COWS" @default.
- W2393278081 hasPublicationYear "2012" @default.
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