Effect of tannins and monensin on feeding behaviour, feed intake, digestive parameters and microbial efficiency of nellore cows

Abstract

2020) Effect of tannins and monensin on feeding behaviour, feed intake, digestive parameters and microbial efficiency of nellore cowsABSTRACT This study aimed to evaluate the associative effect of monensin and tannins on intake, feeding behaviour, digestibility, rumen kinetics, microbial protein synthesis and nitrogen balance. In a 2 Â 4 factorial arrangement, 8 rumen cannulated Nellore cows were distributed in 2 contemporary 4 Â 4 Latin squares and received 8 diets that differed in the level of tannins (0.00, 0.75, 1.50 and 2.25% DM) and presence of monensin. Monensin was daily administered to each cow in one square (about 32 mg/kg DM). No interaction between monensin and tannins was observed (p > .05). Tannins linearly reduced feed intake, but linearly increased daily eating time (p < .05), although these did not alter the number of meals. Monensin increased CP digestibility by 6% (p ¼ .0387) while tannins linearly reduced digestibility of DM, CP, OM and TDN, whereas the reduction was quadratic for ADF and NDF. Tannins linearly reduced the rumen disappearance rate by linearly reducing both passage and digestion rates. Tannins also linearly reduced urinary urea, though neither additive affected microbial protein synthesis. Monensin reduced the proportion of N excreted in faeces, whereas tannins linearly increased faecal N and linearly reduced both urinary and retained N. Monensin and tannins have shown independent effects on feeding behaviour, feed intake, digestive parameters, microbial protein synthesis and N balance, but they did not improve nutrient usage, although monensin alone has shown to have potential to promote N utilisation. Tannins may play an important role in reducing the excretion of N in urine. HIGHLIGHTSTannins reduce the efficiency of nutrient usage in cattle. Tannins change the pathway of the excretion of the feeding nitrogen. The emission of N 2 O from the urine may be reduced by the use of tannins in cattle feeding. ARTICLE HISTORYpromoting the production of propionate (Duffield et al., 2008a). This may alter the feeding behaviour and reduce DMI by a metabolic-feedback effect. The meta-analysis of Duffield et al. (2012) shows that monensin reduces DMI and improves average daily gain through improvement of feed efficiency. But other studies, such as of Hamilton et al. (2010), Mullins et al. (2012) and Perna Junior et al. (2017 found no effect, suggesting that the effect may vary among studies. Monensin also reduces rumen protein digestion with a consequent reduction of rumen ammonia production CONTACT Dr.

Evaluating the Suitability of Hazelnut Skin as a Feed Ingredient in the Diet of Dairy Cows

“…Considering that the HS used in the present trial mainly contained HT, our results are in agreement with the findings of Costa et al [52] who showed higher diet palatability when hydrolysable tannin extract from chestnut instead of condensed tannin extract from mimosa was incorporated into oil-supplemented diets fed to sheep. However, tannins also directly inhibit cellulolytic microorganisms and fibrolytic enzymatic activity and increase rumen physical filling, because of the formation of complexes with lignocellulose that depress fiber digestion [53]. These phenomena could be the reason of the observed reduction of hay intake and, consequently, of total DMI, in our trial.…”

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“…The trend noticed in Table 3 revealed high fractional rate of gas production in Dioclea reflexa seed, and this could translate to availability of adequate nitrogen and high dry matter intake of ruminants for an improved performance. The highest OMD, SCFA, ME and IVDMD obtained in Dioclea reflexa compared to other test seeds implies that the microbes activities may be enhanced in the rumen and increase nutrients uptake (Chumpawadee et al 2007;Ramos et al 2020). The volume of gas produced is a function of relatively high protein quality and tolerable levels of anti-nutrients of the D. reflexa (Figs.…”

“…n = 3 Omotoso et al Bull Natl Res Cent (2020) 44:175 nutritional value of leguminous plants and hinder nutrient absorption (Table 2). Tannins are polyphenolic compounds capable of forming stable complexes with proteins, minerals and vitamins A and B 12 , which results in deterioration of the digestibility and availability of nutrients (Ramos et al 2020). Their negative impact is reflected not only in deterioration of protein digestibility through complexation thereof, but also in blocking the activity of proteolytic enzymes.…”

“…Trypsin inhibitors, which are ANFs for monogastric animals, do not exert adverse effects in ruminants because they are degraded in the rumen. Generally, tannin induces negative responses such as astringency, bitterness or unpleasant taste when consumed (Brown 2008;Huang et al 2018;Ramos et al 2020). Tannins and phytates have been reported to negatively affect the bioavailability of minerals such as iron when consumed in large quantities (Clemens 2014) by forming insoluble anti-nutritional mineral complexes before absorption (Gorczyca et al 2013).…”

Use of Castor Bean Meal, Biodiesel Industry Coproduct, in A Lamb Production System Using Creep-Feeding in Brazil

“…The total daily urinary volume was estimated, according to Tseu et al [ 22 ]. The nitrogen balance was obtained by the difference between the total nitrogen ingested and the total nitrogen excreted in feces and urine.…”