Hwangbo, Soon;Choi, Sun Ho;Kim, Sang Woo;Son, Dong Soo;Park, Ho Sung;Lee, Sung Hoon;Jo, Ik Hwan
Asian-Australasian Journal of Animal Sciences
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v.22
no.8
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pp.1133-1139
/
2009
This study was carried out to investigate effects of crude protein (CP) levels in total mixed rations (TMR) on growth performance and meat quality in growing Korean black goats. Thirty-six 6-month-old growing black male goats (initial body weight =17.95${\pm}$0.13 kg) were used. The goats were randomly divided into four treatments and 9 animals were allotted to each treatment. In terms of treatments, CP levels in TMR were 14, 16, 18, and 20% of dry matter (DM) and all diets were isocaloric (2.4 Mcal ME/kg DM). The experiment lasted for 20 weeks with a 15-day adaptation period. After the end of the trial, five goats from each treatment were slaughtered to measure carcass characteristics and meat quality. Average daily gain (ADG) significantly (p<0.05) increased as dietary CP levels increased, but the highest ADG was found on the 18% CP treatment. The higher CP levels in TMR significantly (p<0.05) decreased feed conversion ratio, but the lowest ratio was on the 18% CP treatment, suggesting a higher bioavailability of nutrients by balanced energy and protein levels on this treatment. There was no significant difference in dressing percentage among treatments, but there was a tendency for levels more than 16% CP in TMR to have a comparatively higher dressing percentage than the 14% treatment. The percentages of meat, fat and bone were not significantly influenced by dietary CP levels. Dietary CP levels did not influence chemical composition of goat meat. Furthermore, there was no significant difference among treatments in any of the sensory parameters except for tenderness. Tenderness was similar for 18 and 20% treatments, which were significantly (p<0.05) higher than the 14% treatment. The results from this study suggested that an adequate CP level in TMR for achieving optimal growth performance and meat quality of growing Korean black goats might be 18% of DM, and that dietary CP level above 18% seemed not to further increase growth performance and meat quality.
A balance trial experiment was carried out to evaluate the potential relationship between an enzymatically hydrolyzed yeast (EHY) and yeast culture combined with a live Bacillus subtilis (Bs) on the productive parameters, ileal digestibility, retention of nutrient and energy and villus morphology in broilers. Seventy two 28 d old, Ross B308 male broilers were assigned to a factorial combination of 2 levels of EHY (0 and 1 kg/ton of feed) and 2 levels of Bs (0 and 125 g/ton of feed). The experiment lasted 2 weeks. Several treatment interactions were observed. EHY-fed broilers showed the lowest feed intake and feed conversion ratio whereas Bs-fed broilers showed the highest feed intake and intermediate feed conversion ratio (EHY and BS interaction, p<0.05). Also, EHY-fed broilers had greater ileal digestibility of dry matter (EHY and BS interaction, p<0.01) and energy (EHY and BS interaction, p<0.05) but these responses were counterbalanced by the combination of EHY and Bs. The thickness of the mucosa was similar between the control and EHY-fed broilers, but was lowest when Bs was added alone (EHY and BS interaction, p<0.01). The thickness of the villus was greater in EHY plus Bs-fed broilers, intermediate for the control and lower for Bs or EHY-fed broilers (EHY and BS interaction, p<0.05). The area of the villus was greater in the control and EHY plus Bs-fed broilers (EHY and BS interaction, p<0.05). In addition, EHY-fed broilers showed greater breast yield and nitrogen retention (p<0.01) and ashes digestibility (p<0.05). On the other hand, Bs-fed broilers had greater carcass and breast weight, nitrogen retention, energy excretion and villus height (p<0.05). In summary, EHY and Bs enhanced some growth, carcass and nutrient retention responses, but did not show any synergic relationship in these responses. Opposite to this, the results suggest that the positive effect of EHY on the feed conversion and digestibility of nutrients were counterbalanced by the addition of Bs.
This study was conducted to investigate the effects of the addition of activated charcoal (AC) and oak charcoal on in vitro ruminal fermentation characteristics, nutrient disappearance, and ruminal gas production. AC and oak charcoal were added at the levels of 0.50, and 1.00 % to experimental diet (roughage/concentrate ratio ; 2/8). Ruminal pH and ammonia-N tended to increase by adding AC(P<0.05). But oak charcoal did not affect the ruminal pH and ammonia-N. Although not significant, ruminal total VFA and molar percentage of butyric acid tended to decrease in AC diets. but molar percentage of acetate and propionate were not affected by adding AC. Ruminal degradation of dry matter, crude protein, NDF, and ADF in AC diets tended to increase than in non-AC diet, however, no tendency in ruminal degradation of hemicellulose was observed. Ruminal gas production tended to increase in the AC and oak charcoal diets(P<0.05). Although there appeared some beneficial effects in adding AC to ruminant diets in this study, more works should be done with AC before we can make clear conclusion on the use of AC in the ruminant diets.
Piao, X.S.;Kim, J.H.;Jin, J.;Kim, J.D.;Cho, W.T.;Shin, I.S.;Han, In K.
Asian-Australasian Journal of Animal Sciences
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v.13
no.5
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pp.645-652
/
2000
A total of 80 piglets ($5.18{\pm}0.61kg$ of BW; 16 d of age) were fed experimental diets to evaluate the effect of extruded full-fat soybean (EFS) on the growth of eatly weaned pigs. Pigs were allotted into five treatments based on body weight, in a completely randomized block design. Each treatment has 4 replicates of 4 animals each. Treatments consisted of diets representing substitutional ratios of EFS for soybean meal. 1) 100:0 (SBM), 2) 75:25 (EFS 25), 3) 50:50 (EFS 50), 4) 25:75 (EFS 75) and 5) 0:100 (EFS 100). During phase I (d 0 to 7), piglets were fed diets containing 3,340 kcal ME, 26% crude protein, 1.85% lysine, 1.0% Ca and 0.9% P. For phase II (d 8 to 21), piglets were fed diets supplying 3,340 kcal ME, 23% crude protein, 1.65% lysine, 0.9% Ca and 0.8% P. Urease activity (pH rise) of EFS (0.18) was three times higher than that of SBM (0.06) indicating that processing conditions were not efficient enough to inactivate urease activity. During the first week postweaning, pigs fed SBM had significantly greater average daily gain (ADG), average daily feed intake (ADFI) and better feed conversion ratio (FCR) compared to pigs fed FFS diets. Linear negative effect on growth rate was found as the inclusion rate of FFS increased. During d 8 - 21 postweaning, piglets fed EFS 50 diet showed the best ADG and FCR despite no significant difference between treatment SBM and EFS 25 have been observed. Overall, piglets fed diets up to 50% FFS inclusion rate exhibited similar weight gain. Only piglets fed EFS 100 diet showed a significantly decreased growth rate. No other significant effect was found in feed intake and feed conversion ratio. At d 7, dry matter digestibility was higher in pigs fed SBM diet than piglets fed EFS 75 diet (p<0.05) and crude protein digestibility was higher in piglets fed SBM diet than piglets fed EFS 50, EFS 75 and EFS 100 (p<0.05). At d 21, no difference other than in phosphorus digestibility was detected. This indicates that piglets at 21 d postweaning are capable of utilizing nutrients from FFS. No treatment effects were detected in blood metabolites. The data suggests that piglets at 16 d of age are not sufficiently mature to use extruded FFS in their diets. Nevertheless, FFS seemed to be able to replace upto 50% of SBM in weaned piglet diet.
Kim, Sang Yeol;Oh, Seong Hwan;Seo, Jong Ho;Yi, Hwi Jong;Hwang, Chung Dong;Bae, Hyun Kyung;Choi, Won Yeong;Oh, Myung Kyu
Proceedings of the Korean Society of Crop Science Conference
/
2017.06a
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pp.327-327
/
2017
The effect of different seedling ages and transplanting times on the growth and yield of Indica ${\times}$ Japonica rice for noodle processing was evaluated to develop a high yielding cultivation technology for increasing the competition against the imported foreign rice. Four seedling ages (10-, 20-, 30- and 33-day old) of two Indica ${\times}$ Japonica rice cultivars (cvs. Saemimyeon and Palbangmi) and three transplanting dates (May 20, May 30 and June 9) were used in the study. Our results showed that the growth and rice yield of the two cultivars were significantly affected by the different seedling ages and transplanting times. Dry matter production at the panicle heading of the two rice cultivars were generally higher in the 30-day old seedling than the other seedling age treatments and then gradually decreased as the transplanting time was delayed from May 20 to June 9. Similar high panicle number per square meter were recorded at the 30-day old seedling between May 20-May 30 transplanting times. In contrast, other yield parameters that includes spikelet number per panicle, 1,000-brown rice weight, and ripened grain ratio (except for the June 9 transplanting time of Palbangmi) were not significantly affected. The milled rice yield of Saemimyeon was higher than that of the Palbangmi regardless of seedling ages and it was also the highest at the 30-day old seedling with four seedling ages. The milled rice yield of Saemimyeon was only slightly decreased as the transplanting time was delayed from the May 20 to June 9 but Palbangmi had a significantly lower milled rice yield at June 9 transplanting due to the low ripened grain ratio. The result indicates that the most suitable seedling age for the cultivars tested was at 30-day old seedling for noodle processing rice and recommended transplanting times were between May 20 and May 30 for the high rice yield in the Yeongnam plain area.
This study was conducted in to elucidate the changes of growth characteristics and photosynthesis in three soybean (Glycine max L. cv. Danwonkong, Hwangkeumkong and Kwangankong) 30 day old seedlings to 100mM NaCl concentration containing 1/2 Hoagland's nutrient solution in sand culture. The main stem height and number of main stem node were decreased. thus, leaf area and dry matter were decreased with 100mM NaCl. Growth reduction was less little in Hwangkeumkong than other cultivars. The stem growth rate was affected less than other parts as root or leaf, by NaCl treatment. The specific leaf area (SLA), shoot : root ratio and leaf : root ratio decreased with NaCl solution except for those of Hwangkeumkong. There is no general tendency in leaf thickness by leaf position of three cultivars. The chlorophyll content (SPAD) of the primary and 2nd leaf slightly decreased under NaCl solution but rapidly increased in non-NaCl solution at 15 days after treatments. The photosynthesis, stomatal conductance and transpiration of 2nd leaf positions reduced by NaCl and there were a sigificant correlation between photosynthesis and stomatal conductance or transpiration.
Gheisar, Mohsen Mohammadi;Hosseindoust, Abdolreza;Kim, Hyeun Bum;Kim, In Ho
Korean Journal of Poultry Science
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v.42
no.2
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pp.133-137
/
2015
We investigated the effects of supplementing low energy diets with lysolecithin and sodium stearoyl-2-lactylate on growth performance and nutrient digestibility in broilers. A total of 768 1-d-old Ross 308, mixed gender broiler chicks with an average initial body weight of 44.3 g, were used in a 35-d feeding trial. Broiler chicks were sorted into pens with 16 birds per pen and every treatment consisted of 12 pens (192 chickens per treatment). Treatments were: 1) PC: basal diet, 2) NC: PC-100 kcal, 3) T1: NC+ 0.08% lysolecithin, and, 4) T2: NC + 0.04% sodium stearoyl-2-lactylate. Body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) were measured on a weekly basis. Chromium oxide was added to the diets at 0.2% on the last week of the experiment, as a marker for digestibility. Dietary treatments had no effect on growth performance for days 1 to 21. Low energy diet supplemented with lysolecithin and sodium stearoyl-2-lactylate in phase 2 (d 21 to 35) improved body weight gain (P<0.05). Addition of lysolecithin and sodium stearoyl-2-lactylate to the diets improved the digestibility of energy and nitrogen (P<0.05), but digestibility of dry matter was not affected. Overall, addition of an emulsifier to the diet of broiler chickens in the late growth phase enhanced growth performance and digestibility of energy and nitrogen.
The objective of this study was to evaluate the effects of adding essential oils to the diet of weaned pigs on performance, nutrient utilization, immune response and intestinal health. A total of 96 weaning pigs ($8.37{\pm}1.58$ kg) were allotted to one of three dietary treatments. The treatments consisted of an unsupplemented basal diet (negative control, NC) or similar diets supplemented with 0.01% of an essential oil product which contained 18% thymol and cinnamaldehyde (EOD) as well as a diet supplemented with 0.19% of an antibiotic mixture which provided 150 ppm chlortetracycline, 80 ppm colistin sulfate and 50 ppm kitasamycin (positive control, PC). Each treatment was provided to eight pens of pigs with four pigs per pen. Over the entire 35 d experiment, ADG and fecal score were improved (p<0.05) for pigs fed the PC and EOD compared with the NC. Dry matter and crude protein digestibility as well as lymphocyte proliferation for pigs fed the PC and EOD diets were increased significantly compared with NC (p<0.05). IGF-I levels in plasma were significantly increased (p<0.05) in pigs fed the PC diet compared with pigs fed the NC diet. Interleukin-6 concentration was lower (p<0.05) and the tumor necrosis factor-${\alpha}$ level was higher (p<0.05) in the plasma of pigs fed the EOD diet than the NC diet. Plasma total antioxidant capacity level increased (p<0.05) in pigs fed the EOD diet compared with pigs fed the NC. Villus height to crypt depth ratio in the jejunum was greater (p<0.05) in pigs fed the PC and EOD diets than the NC. The numbers of E. coli in the cecum, colon and rectum were reduced (p<0.05) in pigs fed the PC and EOD diets compared with the control. In the colon, the ratio of Lactobacilli to E. coli was increased (p<0.05) in pigs fed the EOD diet compared with NC diet. Total aerobe numbers in the rectum were decreased (p<0.05) in pigs fed the PC and EOD diets compared with the control. Collectively, these results indicate that blends of essential oils could be a candidate for use as an alternative to traditional antibiotics in weaning pig diets.
Zhao, Jinbiao;Li, Zhongchao;Lyu, Mingbin;Liu, Ling;Piao, Xiangshu;Li, Defa
Asian-Australasian Journal of Animal Sciences
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v.30
no.5
/
pp.712-719
/
2017
Objective: The objective of this study was to determine the effect of inclusion level on the digestible energy (DE), metabolizable energy (ME), and total tract digestibility of acid-hydrolyzed ether extract (AEE) of cottonseed oil when fed to growing pigs. Methods: Forty-two barrows (initial body weight = $35.51{\pm}2.01kg$) were randomly allotted to a completely randomized design with a corn-soybean meal basal diet, five levels of cottonseed oil (2%, 4%, 6%, 8%, and 10%) and a 10% soybean oil diet. Each diet was replicated six times with one pig per replicate. The experiment lasted 19 days, 7 d for cage adaptation, 7 d for diets adaptation and last 5 d for feces and urine collection. The energy values and apparent total tract digestibility (ATTD) of cottonseed oil and soybean oil were calculated by the difference method, and regression equations were established to predict the energy values of cottonseed oil. The apparent digested fat of the entire intestinal tract was also regressed against dietary fat intake to determine the true total tract digestibility (TTTD) and endogenous loss of fat for cottonseed oil. Results: The results showed that the DE and ME contents of cottonseed oil were not different as the inclusion level increased. The DE and ME values determined by the regression equation were 36.28 MJ/kg and 34.96 MJ/kg, respectively, and the values were similar to the mean DE and ME values calculated by the difference method (36.18 and 35.56 MJ/kg, respectively). The ATTD of cottonseed oil was also not affected by the inclusion level of cottonseed oil, and the TTTD and EFL determined by the regression method were 92.40% and 13.83 g/kg of dry matter intake for corn-soybean basal diet. The DE, ME, and ATTD of AEE in soybean oil determined by the difference method were 35.70 MJ/kg, 35.20 MJ/kg and 92.31%, respectively. There were no differences in the DE, ME, and ATTD between cottonseed oil and soybean oil, although the ratio of unsaturated to saturated fatty acids for soybean oil was higher than for cottonseed oil. Conclusion: The DE, ME, and ATTD values of cottonseed oil were not affected by its dietary inclusion level. The energy values of cottonseed oil determined by the difference and regression methods were similar. Furthermore, the ratio of unsaturated to saturated fatty acid for oils was not the decisive factor to influence the energy values and ATTD of oils.
To maintain a predominantly pasture-based system, the large herd milked by automatic milking rotary would be required to walk significant distances. Walking distances of greater than 1-km are associated with an increased incidence of undesirably long milking intervals and reduced milk yield. Complementary forages can be incorporated into pasture-based systems to lift total home grown feed in a given area, thus potentially 'concentrating' feed closer to the dairy. The aim of this modelling study was to investigate the total land area required and associated walking distance for large automatic milking system (AMS) herds when incorporating complementary forage rotations (CFR) into the system. Thirty-six scenarios consisting of 3 AMS herds (400, 600, 800 cows), 2 levels of pasture utilisation (current AMS utilisation of 15.0 t dry matter [DM]/ha, termed as moderate; optimum pasture utilisation of 19.7 t DM/ha, termed as high) and 6 rates of replacement of each of these pastures by grazeable CFR (0%, 10%, 20%, 30%, 40%, 50%) were investigated. Results showed that AMS cows were required to walk greater than 1-km when the farm area was greater than 86 ha. Insufficient pasture could be produced within a 1 km distance (i.e. 86 ha land) with home-grown feed (HGF) providing 43%, 29%, and 22% of the metabolisable energy (ME) required by 400, 600, and 800 cows, respectively from pastures. Introduction of pasture (moderate): CFR in AMS at a ratio of 80:20 can feed a 400 cow AMS herd, and can supply 42% and 31% of the ME requirements for 600 and 800 cows, respectively with pasture (moderate): CFR at 50:50 levels. In contrast to moderate pasture, 400 cows can be managed on high pasture utilisation (provided 57% of the total ME requirements). However, similar to the scenarios conducted with moderate pasture, there was insufficient feed produced within 1-km distance of the dairy for 600 or 800 cows. An 800 cow herd required 140 and 130 ha on moderate and high pasture-based AMS system, respectively with the introduction of pasture: CFR at a ratio of 50:50. Given the impact of increasing land area past 86 ha on walking distance, cow numbers could be increased by purchasing feed from off the milking platform and/or using the land outside 1-km distance for conserved feed. However, this warrants further investigations into risk analyses of different management options including development of an innovative system to manage large herds in an AMS farming system.
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