• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.3
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• pp.189-196
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• 1999

This study was conducted to evaluate the dry matter yield, quality and utilization of nutrients of wild Korean lespedeza as a forage legume sources. Dry matter(DM) yield of stages, chemical composition and DM digestibility were observed, also DM intake, digestibility and utilization of nitrogen and energy by Korean native goats were determined. Experimental diets include three treatrnents ; mixture grass hay(GS), GS 80% + lespedeza(LA) 20% and GS 60% + LA 40%, respectively. The DM yield of Korean lespedeza(LA) with advancing the growing stage tended to significantly increase(P<0.05). The average DM yield was observed 7,336kg/ha. CP content of LA tended to decrease, but fiber content tended to increase at growing stage advanced(P<0.05). The tannin content of LA was highest in bud stage (54.5mg/g), but tended to decrease at growing stage advanced, lowest in seed ripe stage(26.8mg/g) (P<0.05). With increasing the level of LA supplementation, DM intake by Korean native goats slightly increased, but no differences were observed in all diets. The digestibility of DM, cellular constituents and NDF were slightly lower for GS 100% diets than LA 20% and 40% supplemented diets(P<0.05). Apparently digested N% was not detected significant differences in all diets, but retained N and biological value were higher for LA supplemented diets than for GS 100% diets (P<0.05). Utilization of DE and ME was not detected significant differences in all diets. Above the results, it could be suggested that LA have a potential to provide as forage legume sources considering the DM yield, DM digestibility and nitrogen utilization.

• Asian-Australasian Journal of Animal Sciences
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• v.7 no.4
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• pp.487-491
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• 1994

The experiment was carried out to study the digestibility of nutrients in the neutralized urea-treated rice straw when it was fed singly or in combination with concentrates. A total of 8 crossbred Holstein steers were randomly allocated in a $4{\times}4$ Latin square design consisted of 4 treatments, in which the neutralized straw/concentrates ratio on DM basis varied as 100/0, 90/10, 80/20 and 70/30. The results indicated that the digestibility of DM, ether extract and NFE, and TDN and DE of the diets tended to increase with an increase in the level of concentrates. Regression analysis showed that the values of intercepts should be used for estimating DM digestibility, TDN and DE of neutralized straw, when it was fed with concentrates. Digestibilities of crude fiber, NDF and ADF tended to be higher when it was fed singly than when fed with concentrates. Digestibilities of organic matter and CP were not so much changed with the increasing level of concentrates. Although the animals singly fed the neutralized straw showed positive body weight gain and N-balance, it should be necessary to supplement the concentrates to get more body weight gain and N-balance in the crossbred Holstein steers.

• Journal of The Korean Society of Grassland and Forage Science
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• v.21 no.4
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• pp.247-252
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• 2001

To access the feeding value of the herbage produced from the wildflower pasture, DM intake, digestibility and utilization of nitrogen and energy of herbages by Korean native goats were determined. The experimental herbage included two treatments: Conventional pasture(forage 6 species), wildflower pasture(turf grass 6 species + native wildflower 11 species + introduced wildflower 9 species). The voluntary DM intake of Korean native goats fed with herbages harvested from conventional pasture was higher than that from wildflower pasture(p<0.05). The digestibility of DM, NDF and ADF from conventional pasture was slightly higher than that of wildflower pasture, but no significant difference was observed(p>0.05). The utilization of nitrogen and energy by Korean native goats did not show any difference(pz0.05). In conclusion, the utilization of nitrogen and energy by Korean native goats did not show any significant difference. Thus, possibility of utilizing herbages from wildflower pasture for livestock was to be some extent expected. (Key words : Wildflower pasture, Digestibility, Nitrogen utilization, Energy utilization, Korean native goat)

• Korean Journal of Agricultural Science
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• v.49 no.4
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• pp.647-656
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• 2022

The influence of fermented red ginseng (FRG) and red ginseng extract (RGE) on the growth, nutrient digestibility, and meat quality of growing-fattening pigs was evaluated in the present study. In total, 120 growing-fattening crossbred pigs with a bodyweight of 21.77 kg (_SE1.88) were allocated to 3 treatments with 8 repeats of 5 pigs (2 boars and 3 gilts) for a 22-week experimental period. The pigs were supplemented with a basal diet (CON group) or a basal diet containing 0.1% FRG or 0.1% RGE. Pigs fed the FRG diet had a higher (p < 0.05) average daily gain (ADG) from days 1 to 42 and during the whole period. The apparent nutrient digestibility of dry matter (DM) and nitrogen (N) was improved (p < 0.05) in the FRG treatment in week 6 and that of DM in week 10. Moreover, the drip loss of the meat from the FRG pigs was reduced (p < 0.05) on days 1, 5, 7, and 9. Taken together, this study revealed that the supplementation of 0.1% FRG in the diet improved the ADG and the apparent nutrient digestibility of DM and N and decreased the drip loss of the meat. However, the addition of RGE did not affect the growth of the growing-fattening pigs.

• Nutrition Research and Practice
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• v.2 no.2
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• pp.130-133
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• 2008

This study was conducted to investigate the effects of lecithin, mono-glyceride and mono-diglyceride on apparent total tract and ileal nutrient digestibilities in nursery pigs. Twenty [(Landrace$\times$Yorkshire)$\times$ Duroc] barrows were surgically fitted with simple T-cannulas. Dietary treatments included 1) CON (basal diet: soy oil), 2) LO (lecithin 0.5%), 3) MO (mono-glyceride 0.5%), 4) MG (mono-glyceride 1.0%) and 5) MDG (mono-diglyceride 1.0%). In apparent total tract nutrient digestibility, dry matter (DM) and gross energy (GE) digestibilities of MDG treatments were higher than LO and MG treatments (p<0.05). In nitrogen (N) digestibility, LO treatment showed the lowest compared to others (p<0.05). The digestibility of crude fat was higher in MDG treatment than CON and LO treatments (p<0.05). In apparent ileal nutrient digestibility, DM digestibility was higher in MDG treatment than LO and MG treatments (p<0.05). GE digestibility was higher in MDG treatment than LO, MO and MG treatments (p<0.05). N digestibility of MDG treatment was greater than LO treatment (p<0.05). Also, the digestibility of crude fat was higher in MDG treatment than CON and LO treatments (p<0.05). In conclusion, mono-diglyceride can increase apparent total tract nutrient and apparent ileal nutrient digestibilities of DM, GE, N and crude fat.

• Asian-Australasian Journal of Animal Sciences
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• v.21 no.8
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• pp.1171-1177
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• 2008

The performance of growing rabbits fed Ruzi grass (Brachiaria ruziziensis), head lettuce (Lactuca sativa) residue, Mimosa pigra and water spinach (Ipomoea aquatica) was studied in an experiment using 64 rabbits (4 males and 4 females per treatment) of 2 breeds, New Zealand White and a crossbred between New Zealand White and native breed. The rabbits had an average initial weight of 668 g, were about 6 weeks old and were housed in individual pens. The foliages were fed ad libitum and a commercial concentrate was fed at a restricted level of 2% of body weight on a dry matter (DM) basis. In the digestibility experiment, the rabbits, 4 per foliage and males only, were fed the same foliages as in the growth experiment but without concentrate. Daily weight gain was lower in the group fed Ruzi grass, 14.8 g/d (p<0.001) compared to 17.6, 18.5 and 18.4 g/d for head lettuce, Mimosa pigra and water spinach, respectively. Feed intake and feed conversion ratio were lowest for the rabbits fed water spinach, 66 g DM/d and 3.6 kg DM/kg live weight, respectively. The New Zealand White breed had a higher daily gain than the crossbred rabbits (p<0.05), 18.0 and 16.7 g/d, respectively. There were no significant differences in feed intake, growth or feed conversion ratio due to sex. The digestibility coefficients of DM, organic matter, crude protein, crude fiber, neutral detergent fiber and acid detergent fiber were significantly lower (p<0.001) in the rabbits fed Ruzi grass. Breed and sex had no effect on digestibility. In conclusion, feeding head lettuce residue, Mimosa pigra and water spinach resulted in higher growth rate and digestibility than feeding Ruzi grass and can be recommended as alternative feeds.

• Asian-Australasian Journal of Animal Sciences
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• v.17 no.8
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• pp.1098-1106
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• 2004

In a split-unit design, 12 Javan rusa (Cervus timorensis russa) stags (6 castrated and 6 entire) were used to investigate seasonal (winter, spring and summer) effects on intake, digestibility of food constituents, volatile fatty acid profile, and nitrogen retention, when given lucerne (Medicago sativa) or rhodes grass (Chloris guyana) hays. Entire stags ate 9% more dry matter (DM) than castrates (p<0.05). Both castrated and entire stags exhibited seasonal changes in DM intake, these being higher (p<0.05) in winter (62.3 g/kg $W^{0.75}$) than spring (56.9 g/kg $W^{0.75}$) or summer (55.3 g/kg $W^{0.75}$). Intakes of lucerne hay (211 g protein/kg DM) were significantly higher than of rhodes grass hay (49 g protein/kg DM) in all seasons (p<0.05). Digestibilities of DM (0.58), neutral detergent fibre (0.59) and acid detergent fibre (0.47) were similar between castrates and entires. DM digestibility was higher (p<0.0001) for lucerne (0.66) than rhodes grass (0.55), and was higher (p<0.05) in winter (0.60) than spring (0.58) or summer (0.57). The ruminal acetate concentrations were higher (p<0.001) in spring than summer (78 and 73 molar % respectively). Apparent digestibility of protein was significantly less (p<0.0001) for rhodes grass (0.37) than lucerne (0.75). N retention was positive for lucerne (15.2 g/d) but negative for rhodes grass (-2.8 g/d) (p<0.0001), and was higher (p<0.001) in summer (12.0 g/d) than spring (4.3 g/d) or winter (2.4 g/d). The tropical rusa deer exhibits seasonal variations in feed intake, food constituent digestibilities, VFA profile and N retention. Castration did not alter these traits. The results do not support the view that rusa deer can thrive on low-quality pastures. The productivity and commercial exploitation of rusa deer could be optimised if they are given high-protein feed during spring and summer.

• Journal of The Korean Society of Grassland and Forage Science
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• v.5 no.1
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• pp.84-89
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• 1985

Chemical composition, dry matter and cellulose digestibilities and fermentation rates of alfalfa and orchard grass cut at different time were estimated in vitro method and the results summurized as follows: 1. Crude protein, crude fiber cwc and cellulose content of Alfalfa were decreassed as advancing cutting time. Crude protein, crude fiber and cwc content of Orchard grass were decreased as advancing cutting time up to 3 cutting, but crude protein was slightly increased at 4th cutting, crude fiber and cellulose content were higher at 2nd cutting, but decreased thereafter. 2. DM digestibility of Alfalfa was 51.80, 51.86, 52.92 and 59.52% at 1, 2, 3 and 4th cutting time, respectibly, thus slightly increased as advancing cutting time, and cellulose digestibility of Alfalfa was not much different with different cutting time. DM digestibility of Orchard grass was 62.21, 66.10, 60.95 and 66.32% at 1, 2, 3 and 4th cutting time, respectibly, and cellulose digestibility of Orchard grass was slightly increased at 3rd cutting time and then increased at 4th cutting time. 3. Fermentation rate of DM of alfalfa was the highest 1st cutting time (0.83%/hr.) and was not different at 3 and 4th cutting time. Cellulose fermentation rate of Alfalfa was the highest at 1st cutting time (1.29%/hr.), decreased at 2 and 3th and then increased at 4th cutting time. Fermentation rate of DM of Orchard grass was 1.42, 1.58, 1.60 and 1.57%/hr. and of cellulose was the highest at 2nd cutting time (1.77%/hr.)

• Journal of The Korean Society of Grassland and Forage Science
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• v.19 no.3
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• pp.197-202
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• 1999

This study was conducted to evaluate the dry matter yield, quality and utilization of nutrients of crabgrass (Digitaria sanguinalis L.) dominant swards as a roughage sources. Dry matter yield of stages, chemical composition, DM digestibility was obserbed, and DM intake, digestibility and utilization of nitrogen and energy by Korean native goats was determined. Average DM yield of crabgrass dominant swards was obtained 8,473kg/ha, and average contents of CP, NDF, ADF and lignin was 13.0%, 74.1%, 38.6% and 10.4%, respectively. DM intake by Korean native goats was lower for crabgrass dominant swards than for sown grass swards(P>0.05). Digestibility of DM, celluar constituents, NDF and ADF by Korean native goats was significantly lower for crabgrass dominant swards than for sown grass swards(P<0.05). Utilization of nitrogen and energy by Korean native goats was significantly lower for crabgrass dominant swards than for sown grass sward(P<0.05). Above the results, although crabgrass dominant swards was lower than in DM yield, digestibility, and utilization of N and energy, but the DM yield of crabgrass dominant swards was obtained 8,471kg/ha without fertilizer. Therefore it appears that crabgrass dominant swards have a potential to provide roughage sources.

• Asian-Australasian Journal of Animal Sciences
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• v.15 no.8
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• pp.1139-1146
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• 2002

Sixty crossbred Anglo-Nubian goats (growing females), 18-24 mo of age, with a mean pre-experimental live weight of $20.9{\pm}0.44kg$ were used to investigate voluntary dry matter intake (DMI) and digestibility of supplements of Leucaena leucocephala (LL) leaves to a basal diet of guinea grass. The experiment was a 3 forms of presentation: fresh, wilted and $dry{\times}4$ levels of supplementation: 10, 20, 30 and 40% of total forage allowance with LL leaves. The goats were assigned based on weight and age to one of the twelve diets in a randomized manner and each level had five animals (replicates) per diet for 56 days. The form of presentation of LL leaves had effects on dry matter (DM) and nutrient composition. DM and NDF were higher in the dry LL leaves (p<0.05). In the diets, CP increased as the level of supplementation with LL leaves increased (p<0.05). Mean CP was similar in the fresh ($14.8{\pm}3.5%$), wilted ($14.3{\pm}3.3%$) and dry forms ($13.9{\pm}3.1%$). Neutral detergent fibre (NDF) decreased linearly (p<0.05) with increase in levels of supplementation. Organic matter (OM) followed the trend of CP concentration (p<0.05). Drying was observed to reduce the availability of CP at the different levels of supplementation and subsequently this affected the NDF of the diets. DM intake of the goats on the fresh and wilted LL leaves was significantly higher (p<0.05) than in those on the dry LL leaves. DM intake of the basal diet was observed to decrease as the level of supplementation (p<0.05) increased regardless of the form of presentation of LL. Growth rate was best (p<0.05) on the fresh form followed by wilted and the least in the dry form. Growth rate decreased linearly (p<0.05) with increase in the level of supplementation in the dry form. The form of presentation and level of supplementation influenced DM, CP and OM digestibility (p<0.05). Except for NDF, the digestibility of DM, CP and OM were better (p<0.05) in the goats on fresh LL leaves compared to the wilted and dry leaves. Based on the data on DMI, growth rate and apparent nutrient digestibility coefficients, the results suggest that LL leaves is best utilized when fed fresh or wilted to goats. In the dry form of presentation, the best level of supplementation without a reduction in voluntary DMI and growth rate is the 20%. In the fresh and wilted form, LL leaves could be fed up to the 40% level with improved DMI, growth rate and nutrient utilization.