Three sheep fitted with cannulas in the rumen and the caecum were used in a $3{\times}3$ Latin square design to study the changes in ruminal and caecal microbial populations and their metabolite composition with ammoniated rice straw feeding. The 3 diets contained either 80% untreated rice straw (UTS) or ammoniated rice straw (ATS) and 20% formula feed. These were a control diet (C), a urea supplemented diet (U) containing urea at 1.1% and an ammoniated rice straw diet (AT). Data were analyzed by analysis of variance and means separated by the Student Neumann Kuel's multiple comparison. AT feeding increased ruminal bacterial counts, in particular cellulolytic bacterial counts (p < 0.05) which were 1.8, 2.4 and 7.0 (${\times}10^6/ml$ ruminal fluid) for C, U and AT, respectively. There was an increasing tendency (p < 0.10) in ruminal fungal population with U; values were 2.0, 5.2, 3.1 (${\times}10^3/ml$ ruminal fluid) for C, U and AT, respectively. Ruminal protozoa counts were not significantly (p > 0.05) altered with diets. Caecal total viable bacterial count with AT was about thrice the value with C. Total VFA concentration in the rumen was significantly increased (p < 0.025) (7.7 mmol/dl for C and 8.2 mmol/dl for AT) and correspondingly, pH lowered when AT was fed. Sheep on AT tended to produce less acetate and more butyrate in the rumen without significance (p > 0.05). Similar to the rumen, total VFA concentrations of 4.4, 3.8 and 5.2 mmol/dl were detected, respectively, for C, U and AT. Caecal ammonia-nitrogen concentrations were about six-fold of that in the rumen, though there were no differences (p > 0.05) among treatments.
Journal of The Korean Society of Grassland and Forage Science
/
v.15
no.3
/
pp.215-221
/
1995
Three fistulated nonlactating Holstein cows were used to examine the change in ruminal characteristics when fed diets of 100% corn silage, 50% corn silage + 50% wet brewers' grain(WBG) and 100% WBG, and also twenty Holstein heifers averaging 156 $\PM$ 3.2kg BW were randomly assingned to determine the adequate feeding level of concentrate with the following treatments ; Only WBG, concentrate to 0.5, 1.0 and 1.5% of BW under feeding WBG ad libitum. Tne main results were as follows : I. Ruminal pH was minimized 3 hrs after feeding and then gradually increased. The mean ruminal pH was highest in feeding only WBG (6.72) and lowest in only corn silage(6.0) 2. Ruminal $NH_3$-N concentration was maximized 1 hr after feeding and then gradually decreased regardless of diets, n7e average ruminal $NH_3$-N content was highest in diet of 100% WBG(12.9 rngldl) and lowest in 100% corn silage(5.9 mg/dl) 3. Acetic acid percent among VFA was highest when WBG replaced 50% corn silage and acetic to propionic acid ratio was higher in order of feeding only corn silage, 50% corn silage + 50% WBG and only WBG. 4. Ruminal bacteria and protozoa number in diet of 50% corn silage + 50% WBG were 8.14 $\times$ > $10^5$ and 1.45 $\times$$10^5$, respectively, which were most of all treatments. 5. Daily gain and feed efficiency of Holstein heifer in feeding concentrate to 0.5% of BW and forage hay to about 20% of total DM intake when fed free WBG were better
Kim, C.H.;Park, B.K.;Park, J.G.;Kim, H.S.;Sung, K.I.;Shin, J.S.;Ohh, S.J.
Journal of Animal Science and Technology
/
v.47
no.5
/
pp.759-768
/
2005
The study was designed to estimate the in vitro rumen by-pass rate of both chromium methionine chelate as an organic supplement and $ClCl_3$ as an inorganic supplement. Rumen by-pass rates of the supplements were evaluted by comparing ruminal metabolites in rumen fluid and Cr and methionine contents in the body of ruminal microorganism. For in vitro digestion examination, basic nutrients for ruminal microbes were supplied with 7g(DM) of feed, 2g of rice straw, and 2g of corn silage per each incubation jar. Three treatments including Control(no supplementation of Cr), T1(1000ppb supplementation of $ClCl_3$) and T2(chromium methionine chelate supplementation equivalent to 1000ppb of Cr content) were prepared with five replications per each treatment. pH of T2 was lower than that of Control and T1 regardless of incubation time. Ammonia content was higher in T2 than in Control and T1 during first 6 hours of incubation. However, the ammonia content in Control was remained low after 6 hours. Total volatile fatty acids(VFA) content in control was increased constantly as incubation time was extended. Therefore, VFA content in T1 and T2 were significantly lower (P<0.05) than those of Control. Dry matter recovery rate by ruminal microorganism was the lowest in T1, however ruminal microbial population was increased most efficiently in T2 during 12 hours of in vitro incubation. Cr concentrations in the body of ruminal microbes were not different(P>0.05) between Control and T2, but it was significantly high in T1(P<0.05). Contents of methionine and cystine in ruminal microbes also were not different between Control and T2(P>0.05), but it was relatively low in T1. Based on the above results, the chromium methionine chelate was believed to by-pass rumen and could remain intact until it reaches small intestine compared to inorganic chromium. This results implies that chromium methionine chelate could be more effective to function in the small intestine of ruminant animals.
Kim, Chang-H.;Kim, Jong N.;Ha, Jong K.;Yun, Sang G.;Lee, Sung S.
Asian-Australasian Journal of Animal Sciences
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v.17
no.3
/
pp.337-342
/
2004
A non-ionic surfactant, Tween 80 has been known to exert a number of positive effects on degradative enzymes in in vitro aerobic and anaerobic microbial cultures. An experiment was conducted to examine effects of supplementation of Tween 80 on ruminal fermentation and nutrient digestibility of Hanwoo steers. The experiment was designed as a $3{\times}3$ Latin square with duplication and six Hanwoo steers with rumen cannulae, average weight 497 (SE 61.1) kg. For the experiment the animals were given a basal diet consisting of rice straw and compound feed mixed at 4:6 ratio. The three experimental treatments were (1) the basal diet, supplemented with (2) 5 g/d Tween 80 and (3) 10 g/d Tween 80. Ruminal pH was significantly (p<0.05) affected by Tween 80 supplementation at 6 h after feeding. Increasing supplementation levels of Tween 80 linearly increased the total VFA concentration. CMCase activity by the 10g/d supplementation of Tween 80 were significantly increased (p<0.05) by 24.4% compared with that of control. Digestibility of crude fiber was significantly increased (p<0.05) in Hanwoo steers fed the diet supplemented with 10 g/d Tween 80 compared with those of control, whilst digestibility of ether extract (EE) was linearly increased by increasing Tween 80 supplementation level (p<0.05). In other nutrient components, their digestibilities of Hanwoo fed diets supplemented with Tween 80 tended to increase. It is concluded that Tween 80 has a potential for industrial application as a feed additive to improve ruminant production.
Journal of The Korean Society of Grassland and Forage Science
/
v.39
no.3
/
pp.132-140
/
2019
Fermented total mixed ration (TMR) is a novel feed for ruminants in South Korea. The purpose of this study was to evaluate the effects of lactic acid bacteria (LAB) on the quality of TMR and in vitro ruminal fermentation. Strains of three LAB spp. (Lactobacillus plantarum, L. brevis, L. mucosae) were used in fermentation of TMR. Inoculations with the three LAB spp. lowered pH and increased concentrations of lactic acid, acetic acid, and total organic acid compared to non-LAB inoculated control (only addition of an equivalent amount of water) (p<0.05). Bacterial composition indicated that aerobic bacteria and LAB were higher. However, E. coli were lower in the fermented TMR than those in the control treatment (p<0.05). Among the treatments, L. brevis treatment had the highest concentration of total organic acid without fungus detection. Gas production, pH, and ammonia-nitrogen during ruminal in vitro incubation did not differ throughout incubation. However, ruminal total VFA concentration was higher (p<0.05) in the LAB spp. treatments than the control treatment at 48 hours. Overall, the use of L. brevis as an inoculant for fermentation of high moisture. TMR could inhibit fungi growth and promote lactic fermentation, and enhance digestion in the rumen.
The aim of this study was to evaluate the effect of incorporating wet sorghum distiller's grains (WSDG) as part of their diet on the lactating performance of dairy cows. Twenty-seven Holstein milking cows were selected, all in the early lactating stage, with an average weight of 550 kg, and producing an average of 30 kg of milk daily. The cows were divided into three groups according to milk yield and lactation and were fed different total mixed rations. The diets were formulated according to NRC (1989) recommendations in three rations to (1) control diet, (2) 15% WSDG diet and (3) 30% WSDG diet. The three different diets were all formulated as iso-nitrogen and iso-energetic diets. After one week adaptation period, the experimental feeding was conducted for 8 weeks. Three ruminal cannulated cows were also examined in order to investigate ruminal fermentation of the three total mixed rations. The results showed that the milk yield, as corrected to the 4.0% fat standard, had no significant difference among the control, 15% WSDG and 30% WSDG treatment groups (p>0.05). The daily dry matter intake of the control group was higher than the other groups (p<0.05). with respect to milk composition, milk fat, milk protein and total solids, there was no significant difference among the treatment groups (p>0.05). The energy efficiency of the 30% WSDG group were significantly higher than the other treatment groups (p<0.05). Ruminal pH value showed no difference among the treatment groups (p<0.05). Ammonia-nitrogen concentration in the control group was higher than the other treatment groups (p<0.05). The concentration of total ruminal volatile fatty acid was similar in all three dietary groups.
The fermentative quality and quantitative change in anthocyanin of anthocyanin-rich corn (Zea mays L.) during storage and in vitro ruminal fermentation were studied. The anthocyanin-rich corn silages in bag silo, drum silo and round bale had good fermentative qualities, such as low pH (5% DM) and butyric acid-free, and its quality was maintained for more than 370 d. The amount of anthocyanin in the anthocyanin-rich corn decreased after ensiling by about 45% (from 3.34 to 1.88 mg/g DM), but stayed constant after day 60. The in vitro incubation of the anthocyanin-rich corn with ruminal fluid revealed little degradation of anthocyanin. These results indicate that the anthocyanin had no negative effect on silage fermentation, and the anthocyanin-rich corn silage is utilizable for practical use as a feedstuff. Our results also demonstrate alteration of the anthocyanin content during storage, and show that anthocyanin-rich corn is a suitable antioxidant source for ruminants because of the high stability of the anthocyanin in ruminal fluid.
In this study, changes of ammonia, alcohol and volatile fatty acid(VFA) concentrations or pH in in vitro ruminal fluid were studied to determine the effects of alcoholic feeds on in vitro ruminal fermentation characteristics. To formulate the alcoholic feeds, alcohol was added to commercial formulated feed at the levels of 1, 3, and 5 %. Experiments were done with four treatment groups, control(commercial feed), AF-1(commercial feed+1% alcohol), AF-3(commercial feed+3% alcohol), and AF-5(commercial feed+5% alcohol). Ammonia concentrations of AF-1 and AF-5 were significantly lower than that of control for the 12h incubation(p<0.05). Ruminal alcohol concentration was increased with the addition level of alcohol increased(p<0.05). TVFA concentrations of AF-1, AF-3 and AF-5 were significantly higher than those of control at 12h(p<0.05). Significant decrease of molar percentage of acetate was observed in control from 8 to 12h incubation, but molar percentage of acetate for AF-1, AF-3 and AF-5 was constant. Molar percentage of propionate was increased in control compared with AF-1, AF-3 and AF-5 from 8 to 12h incubation(p<0.05). Molar percentages of butyrate and valerate were higher in AF-1, AF-3 and AF-5 than in control(p<0.05). Molar percentage of caproate for AF-1, AF-3 and AF-5 was 0.05, 0.58 and 0.47M% at 8h, respectively, but that was not detected for control. Present results may indicate that the alcoholic feeds show positive effects on in vitro ruminal ammonia, alcohol and VFA concentrations or pH. Furthermore, the results of this study implies that the addition level of 5% could be more effective to ruminal fermentation than other addition levels.
Objective: An experiment was conducted to investigate the effects of a specific mixture of essential oils (MEO), containing thyme, clove and cinnamon EO, on rumen microbial fermentation, nutrient apparent digestibility and blood metabolites in fistulated sheep. Methods: Six sheep fitted with ruminal fistulas were used in a repeated measurement design with two 24-d periods to investigate the effect of adding MEO at 0 (control), 0.8, and 1.6 mL/d on apparent nutrient digestibility, rumen fermentation characteristics, rumen microbial population and blood chemical metabolites. Animals were fed with a 50:50 alfalfa hay:concentrate diet. Results: Ruminal pH, total volatile fatty acids (VFA) concentration, molar proportion of individual VFA, acetate: propionate ratio and methane production were not affected with MEO. Relative to the control, Small peptides plus amino acid nitrogen and large peptides nitrogen concentration in rumen fluid were not affected with MEO supplementation; while, rumen fluid ammonia nitrogen concentration at 0 and 6 h after morning feeding in sheep fed with 1.6 mL/d of MEO was lower (p<0.05) compared to the control and 0.8 mL/d of MEO. At 0 h after morning feeding, ammonia nitrogen concentration was higher (p<0.05) in sheep fed 0.8 mL/d of MEO relative to 1.6 mL/d and control diet. Ruminal protozoa and hyper ammonia producing (HAP) bacteria counts were not affected by addition of MEO in the diet. Relative to the control, no changes were observed in the red and white blood cells, hemoglobin, hematocrit, glucose, beta-hydroxybutyric acid, cholesterol, total protein, albumin, blood urea nitrogen and aspartate aminotransferase and alanine aminotransferase concentration. Apparent total tract digestibility of dry matter, crude proten, organic matter, and neutral detergent fiber were not influenced by MEO supplementation. Conclusion:The results of the present study suggested that supplementation of MEO may have limited effects on apparent nutrient digestibility, ruminal fermentation and protozoa and HAP bacteria count, blood cells and metabolites.
This study was conducted to examine the nutrient digestibility and ruminal fermentation characteristics in sheep fed dried mugwort and mugwort silage for 5% levels of rice straw in the basal diet, and mugwort pellet for 5% levels of concentrate in the basal diet. For the experiment, they were given a basal diet containing of rice straw and concentrate mixed at a 3: 7 ratio (DM basis). The treatments were designed as a 4 ${\times}$ 4 Latin square design with four sheep (50.2 kg body weight). The digestibility of crude protein was increased (p < 0.05) to 4.6 - 6.2 % in sheep fed mugwort silage treatments (60.23 %) compared with those of control (54.08 %) and dried mugwort treatment (55.67 %). That of ether extract was iicreased (p < 0.05) to 4.8 - 8.8 % in sheep fed mugwort silage treatments (80.22 %) compared with those of control (71.47 %) and dried mugwort treatment (75.46 %). In the dry matter intake, mugwort silage treatment (904.44 g) was the hightest and mugwort pellet treatment, dried mugwort treatment and control were 810.66 g, 780.66 g and 742.18 g, respectively. The ruminal pH in all treatments were rapidly decreased (p < 0.05) at 0.5 and 1 hour after feeding and slowly increased at 2, 4 and 8 hours after feeding, especially mugwort silage treatment. The ammonia nitrogen concentrations were the highest (p < 0.05) in sheep fed mugwort silage treatment (11.24 - 12.05mg / 100 rnz) at 0.5 and 2 hours after feeding. The ruminal concentrations of acetic acid (6.06 mmol /100 $m\ell$) and propionic acid (2.35 mmol/ 100 mz) were an increased (p < 0.05) at the mugwort silage treatments at 1 and 2 hours after feeding. Purine derivatives out put (13.41 mmol / d) and microbial protein production (11.61 mmol / d) were increased (p < 0.05) compared with those of control (5.42 and 4.93 mmol / d).
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