Yahaya, M.S.;Kibon, A.;Aregheore, E.M.;Abdulrazak, S.A.;Takahashi, J.;Matsuoka, S.
Asian-Australasian Journal of Animal Sciences
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v.14
no.4
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pp.496-500
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2001
In vitro and in vivo experiments were carried out to evaluate the nutritive value of three tropical browse species as assessed by DM and CP digestibility, and NDF and ADF degradability with incubation times (T) of 6, 12, 24 and 48h. During the in vivo digestibility experiment three male castrated sheep (age 16 - 25 months) with a mean liveweight of $11.5{\pm}0.9kg$ were placed in individual metabolism stalls and were allocated to one of the three browse species in a $3{\times}3$ Latin square design. The browse species were all leguminous and consisted of: Acacia sieberina (A. sieberina), Ficus polita (F. polita), and Ficus sycomorus (F. sycomorus). The mean DM and CP contents of F. polita were higher than for A. sieberina and F. sycomorus (p<0.05). In contrast the NDF and ADF contents of F. sycomorus were higher compared to the other species examined (p<0.05). The in vitro DM and CP digestibility, and NDF and ADF degradability observed at different stages of incubation were higher in F. polita followed by A. sieberina and F. sycomorus. The DM and CP digestibility at 48 h incubation were 72.92, 74.84 and 53.52% and 77.38, 77.68 and 63.64% for A. seiberina, F. polita and F. sycomorus, respectively. This shows that F. polita contains more soluble materials which ruminant can benefit from and hence has more feeding value. The fermentation of F. sycomorus was slower for all the nutrients evaluated due to the presence of more fibre. Similarly, higher in vivo digestibility coefficient of DM, CP, NDF, ADF and hemicellulose were observed for F. polita reflecting its higher values of CP, ether extract (EE) and hemicellulose associated with lower values of NDF and ADF. Higher DMI and daily gain were recorded in sheep during feeding of F. polita compared to the other species evaluated. The digestibility of all the nutrients examined were higher in the in vivo than in the in vitro trial except for CP and DM. Sheep showed no visual signs of toxicity throughout the study periods. These results showed A. seiberina, F. polita and F. sycomorus can sustain sheep on a maintenance diet and could as well be used as a supplementary feed to low producing animals during the tropical dry season. Further research is needed to ascertain the viability of using these browse species on a long-term basis.
A study involving nutrient balances and radioisotope labeling techniques was undertaken to study energy and protein metabolism, and glucose kinetics of female crossbred Etawah goats, using 12 weaned (BW $14.0{\pm}2.0kg$), 12 late pregnant (BW $27.8{\pm}1.8kg$) and 12 first lactation does (BW $25.0{\pm}5.0kg$). Each class of animal was randomly allotted into 3 dietary treatment groups R1, R2 and R3, that received 100%, 85%, and 70% of ad libitum feed. The rations offered were pellets containing 21.8% CP and 19.3 MJ GE/kg, except for the lactating does who received pellets (17.2% CP and 18.9 MJ GE/kg) and fresh Penisetum purpureum grass. Energy and nitrogen balance studies were conducted during a two-week trial. Daily heat production (HP, estimated by the carbon dioxide entry rate technique), glucose pool and flux were measured. Equations were found for metabolizable energy (ME) and protein intake (IP) requirements for growing goats: ME (MJ/d)=1.87+0.55 RE-0.001 ADG+0.044 RP $(R^2=0.89)$ and IP (g/d)=48.47+2.99 RE+0.029 ADG+0.79 RP $(R^2=0.90)$; for pregnant does: ME (MJ/d)=5.92+0.96 RE-0.002 ADG+0.003 RP $(R^2=0.99)$ and IP (g/d)=58.34+5.41 RE+0.625 ADG-0.30 RP $(R^2=0.98)$; and for lactating does: ME (MJ/d)=4.23+0.713 RE+0.003 ADG+0.006 RP+0.002 MY $(R^2=0.86)$; IP (g/d)=84.05-5.36 RE+0.055 ADG-0.16 RP+0.068 MY $(R^2=0.45)$, where RE is retained energy (MJ/d), ADG is average daily gain in weight (g/d), RP is retained protein (g/d) and MY is milk yield (ml/d). ME and IP requirements for maintenance for growing goats were 0.46 MJ/d.kg $BW^{0.75}$ and 7.43 g/d.kg $BW^{0.75}$, respectively. Values for the pregnant and lactating does were in the same order, 0.55 MJ/d.kg $BW^{0.75}$ and 11.7 g/d.kg $BW^{0.75}$, and 0.50 MJ/d.kg $BW^{0.75}$ and 10.8 g/d.kg $BW^{0.75}$, respectively. Milk protein ranged from 3.06 to 3.5% and milk fat averaged 5.2%. Glucose metabolism in Etawah crossbred female goat is active, but glucose flux is low compared to temperate ruminant breeds which may implicate its role to support production.
This study was conducted to evaluate effects of plant extracts on methanogenesis and rumen microbial diversity in in vitro. Plant extracts (Artemisia princeps var. Orientalis; Wormwood, Allium sativum for. Pekinense; Garlic, Allium cepa; Onion, Zingiber officinale; Ginger, Citrus unshiu; Mandarin orange, Lonicera japonica; Honeysuckle) were obtained from the Plant Extract Bank at Korea Research Institute of Bioscience and Biotechnology. The rumen fluid was collected before morning feeding from a fistulated Holstein cow fed timothy and commercial concentrate (TDN; 73.5%, crude protein; 19%, crude fat; 3%, crude fiber; 12%, crude ash; 10%, Ca; 0.8%, P; 1.2%) in the ratio of 3 to 2. The 30 ml of mixture, comprising McDougall buffer and rumen liquor in the ratio of 4 to 1, was dispensed anaerobically into serum bottles containing 0.3 g of timothy substrate and plant extracts (1% of total volume, respectively) filled with $O_2$-free $N_2$ gas and capped with a rubber stopper. The serum bottles were held in a shaking incubator at $39^{\circ}C$ for 24 h. Total gas production in all plant extracts was higher (p<0.05) than that of the control, and total gas production of ginger extract was highest (p<0.05). The methane emission was highest (p<0.05) at control, but lowest (p<0.05) at garlic extract which was reduced to about 20% of methane emission (40.2 vs 32.5 ml/g DM). Other plant extracts also resulted in a decrease in methane emissions (wormwood; 8%, onion; 16%, ginger; 16.7%, mandarin orange; 12%, honeysuckle; 12.2%). Total VFAs concentration and pH were not influenced by the addition of plant extracts. Acetate to propionate ratios from garlic and ginger extracts addition samples were lower (p<0.05, 3.36 and 3.38 vs 3.53) than that of the control. Real-time PCR indicted that the ciliate-associated methanogen population in all added plant extracts decreased more than that of the control, while the fibrolytic bacteria population increased. In particular, the F. succinogens community in added wormwood, garlic, mandarin orange and honeysuckle extracts increased more than that of the others. The addition of onion extract increased R. albus diversity, while other extracts did not influence the R. albus community. The R. flavefaciens population in added wormwood and garlic extracts decreased, while other extracts increased its abundance compared to the control. In conclusion, the results indicated that the plant extracts used in the experiment could be promising feed additives to decrease methane gas emission from ruminant animals while improving ruminal fermentation.
Objective: The current study was carried out to examine the response of different levels of fat and protein in calf starter on nutrient utilisation, nitrogen metabolism, weight gain, blood parameters, and immunity level in pre-ruminant calves. Methods: Twenty four calves (5 days old) were divided into six groups in a 2×3 factorial design, with two levels of fat (10% and 14%) and three levels of protein (18%, 21%, and 24%). The calves were kept in individual pens for 120 days and fed with whole milk (1/10th of body weight) and calf starter ad-libitum. Daily dry matter intake was recorded; whereas body weight was taken on fortnightly basis to calculate average daily gain. During the growth trial blood samples were collected at 30 days interval to estimate blood glucose, albumin, total protein, total leucocyte count, total immunoglobulins and immunoglobulin G levels. A metabolic trial of seven days was carried out to find out the digestibility of different nutrients. Results: The dry matter intake was reduced (p<0.05) with higher fat and protein levels whereas feed conversion efficiency was improved (p<0.05) with higher protein level. Different levels of fat and protein in calf ration did not affect average daily gain in calves. The dry matter, organic matter, and crude protein digestibility were significantly (p<0.01) higher with increased level of protein. The nitrogen retention was also significantly higher (p<0.05) at 24% protein level, similarly the total immunoglobulin was significantly (p<0.05) high in higher protein fed groups, showed better immunity. Conclusion: The present finding suggested that 10% fat and 18% protein level of calf starter could be used in Sahiwal calves for optimum performance in terms of weight gain and immunity.
This study, in which sheep were used as models for beef cattle, was conducted to determine the effect of replacing 100% of rice straw with deepstacked broiler Iitter(BL) as a roughage source on total tract apparent digestibility, digestible nutrient intake, ruminal and blood parameters, and N balance of sheep. Under the conventional formulated mix-rice straw(60: 40) feeding system(control), replacement of rice straw with BL resulted in similar(P> 0.05) total tract apparent digestibilities of fiber and organic matter, similar(P> 0.05) intake of digestible NDF, ADF and organic matter, and higher(P <0.05) intake of digestible crude protein. Feeding BL instead of rice straw resulted in 10wer(P <0.05) ruminal pH, higher(P <0.05) $NH^3-N$ concentration and similar(P> 0.05) rominal volatile fatty acid percentage and blood urea concentration. In a N balance study, increased(P<0.05) N intake for the BIAed group induced higher(P <0.05) quantities(g/d) of fecal and urinary N excretion, bodily N absorption, and N retention. It was concluded that deepstacked BL fiber was comparable to rice straw fiber as a roughage source and BL protein was also favorably utilized within the body of ruminant.
Na, Young Jun;Lee, Kyung Won;Hong, Kyung Hee;Lim, Jong Soo;Kim, Myeong Hwa;Kim, Kyeong Hoon;Lee, Sang Rak
Journal of The Korean Society of Grassland and Forage Science
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v.33
no.4
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pp.269-274
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2013
This study is conducted to estimate the nutrient compositions and in-situ ruminal disappearancerates of roughage sources which are commonly used in South Korea. Twelve types of roughage sources are being selected based on surveys from more than 50 farms, and 12 samples from various farms and companies are collected and analyzed for their nutritive components and minerals. Two Hanwoo steers (BW $526{\pm}14$ kg) with ruminal cannula are used to investigate in situ ruminal degradability. Five roughage sources, timothy hay, alfalfa pellet, rice straw, klein grass hay and tall fescue straw, are all selected from 12 roughage sources above for further experiments. Overall, the nutrient components and minerals from the 12 roughage sources have shown low values when comparing with standard tables of feed compositions in Korea. In situ dry matter disappearance rate is recorded as high in order of klein grass, timothy, alfalfa pellet, tall fescue and rice straw. In situ crude protein disappearance rate is high in order of alfalfa pellet, klein grass, timothy, tall fescue and rice straw.
Objective: Reducing roughage feeding without negatively affecting rumen health is of interest in ruminant nutrition. We investigated the effects of roughage sources and concentrate types on growth performance, ruminal fermentation, and blood metabolite levels in growing cattle. Methods: In this 24-week trial, 24 Hanwoo cattle ($224{\pm}24.7kg$) were fed similar nitrous and energy levels of total mixed ration formulated using two kinds of roughage (timothy hay and ryegrass straw) and two types of concentrate mixes (high starch [HS] and high fiber [HF]). The treatments were arranged in a $2{\times}2$ factorial, consisting of 32% timothy-68% HS, 24% timothy-76% HF, 24% ryegrass-76% HS, and 17% ryegrass-83% HF. Daily feed intakes were measured. Every four weeks, blood were sampled, and body weight was measured before morning feeding. Every eight weeks, rumen fluid was collected using a stomach tube over five consecutive days. Results: The mean dry matter intake (7.33 kg) and average daily gain (1,033 g) did not differ among treatments. However, significant interactions between roughage source and concentrate type were observed for the rumen and blood parameters (p<0.05). Total volatile fatty acid concentration was highest (p<0.05) in timothy-HF-fed calves. With ryegrass as the roughage source, decreasing the roughage inclusion rate increased the molar proportion of propionate and decreased the acetate-to-propionate ratio; the opposite was observed with timothy as the roughage source. Similarly, the effects of concentrate types on plasma total protein, alanine transaminase, Ca, inorganic P, total cholesterol, triglycerides, and creatinine concentrations differed with roughage source (p<0.05). Conclusion: Decreasing the dietary roughage inclusion rate by replacing forage neutral detergent fiber with that from non-roughage fiber source might be a feasible feeding practice in growing cattle. A combination of low-quality roughage with a high fiber concentrate might be economically beneficial.
Jo, Seong-Uk;Lee, Shin-Ja;Lee, Ye-Jun;Kim, Hyun-Sang;Eom, Jun-Sik;Choi, You-Young;Bae, Eun-Ji;Lee, Sung-Sill
Korean Journal of Organic Agriculture
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v.29
no.2
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pp.241-256
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2021
The current study was to evaluate the antioxidant activity of Phyllostachys bambusoides (PHB) as a feed additives and investigate whether its antioxidant activity could be helpful for increasing rumen fermentation characteristics and methane reduction. The antioxidant activity results showed that total polyphenols and flavonoids contents were 43.54 ± 8.68 mg CE/g and 17.13 ± 0.45 mg QE/g, respectively, and the IC50 values for 1,1-diphenyl-2-prcrylhydrazyl (DPPH) and 2,2'-azino-bis (3- ethylbenzthiazoline-6- sulphonic acid) (ABTS) radical scavenging activity were 163.13 ± 19.25 ㎍/mL and 97.07 ± 4.46 ㎍/mL, respectively. Two heads of cannulated Hanwoo (450 ± 30 kg), consuming timothy hay and a commercial concentrate (60:40, w/w) twice daily (at 09:00 and 17:30) at 2% of body weight, with free access to water and a mineral block, were used as rumen fluid donors. An in vitro incubation experiment was performed after 6, 12, 24, 48, and 72 hr with PHB added at concentration of 2, 4, and 6% of timothy hay basis. Total gas emission decreased as the amount of PHB addition increased at 6 and 24 hr of incubation. However, PHB addition did not affect total volatile fatty acid production, and methane and carbon dioxide emission also decreased as the amount of addition increased at 48 hr of incubation. Therefore, PHB was expected to be used as methane reducing additives in the ruminants.
Kim, Gyeom-Heon;Kim, Hyun-Jin;Hwang, Won-Uk;Kim, Soo-Ki
Journal of agriculture & life science
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v.50
no.5
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pp.153-162
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2016
This study was conducted to investigate a proper management and nutrient supply for raising replacement heifers to improve lactating performance. In order to determine a proper TDN/CP ratio that would be suitable for domestic use, 13-month-old replacement heifers were fed in the ratios of 4.6:1(T1) and 4.3:1(T2), respectively, to examine the changes in nutritional intake, digestibility, characteristics of rumen fluid and blood compositions. While dry matter intake was same at 9.0kg/day, CP intake did not show any significant difference, though T2(1.45kg/day) was slightly higher than T1(1.34kg/day). In fiber intake and digestibility, two results showed no significant difference, though T1 was slightly higher than T2. The pH, NH3-N and VFA densities in rumen fluid examined at the fourth hour after feed intake did not show any significant difference either. Overall level of VFA was not influenced largely by the TDN/CP ratio, but the iso-butyrate and iso-valerate levels and the A/P ratio were significantly high in T1(p<0.05). In blood characteristics, the treatments showed no significant difference. In conclusion, the TDN/CP ratios of 4.3:1 and 4.6:1 did not significantly affect the characteristics of the ruminant stomach, but in comparison with digestibility of 13-month-old heifers, the ratio of 4.6:1 was more appropriate for increased intake of fiber and higher digestibility.
Journal of the Korea Organic Resources Recycling Association
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v.14
no.1
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pp.103-111
/
2006
Fresh dairy cow manure was mixed with dried sawdust at the following moisture contents and manure: sawdust ratios: 50% and 57:43 ($\underline{M50}$), 55% and 64:36 ($\underline{M55}$), 60% and 70:30 ($\underline{M60}$), 65% and 76:24 ($\underline{M65}$), 70% and 83:17 ($\underline{M70}$) 75% and 90:10($\underline{M75}$) and 80% and 96:04($\underline{M80}$). The mixtures were fermented by a fungal mycelium of Fomitella flaxinea for 2wk at 29 C to recycle cow manure along with sawdust and fungal mycelium as a ruminant feedstuff. Chemical composition and in vitro rumen dry matter digestibilities of fermented mixtures were compared with unfermented mixture. The crude protein contents of mixtures were not changed by fermentation with fungal mycelium. Neutral detergent fiber contents of 4WK fermented mixtures (90.6, 85.3, 80.4, and 76.4% for $\underline{M50}$, $\underline{M60}$, $\underline{M70}$ and $\underline{M80}$, respectively were lower (P<0.05) than those of unfermented mixtures (91.1, 89.9, 84.3, and 79.4%). However, acid detergent fiber contents of fermented mixtures (73.8, 68.9, 65.3, and 58.0%) were higher (P<0.05) than those unfermented mixtures (70.2, 67.8, 61.7, and 56.3%). In vitro rumen dry matter digestibilities of fermented mixtures for four weeks(49.4, 36.8, 28.6, and 22.3% for $\underline{M50}$, $\underline{M60}$, $\underline{M70}$ and $\underline{M80}$) were higher than those of unfermented mixtures(34.1, 27.5, 20.6, and 15.4%) (P<0.05).
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