Byeonghan Lee;Deok-Gyeong Seong;Young Min Jin;Yeon-Hyeon Hwang;Young-Gwang Kim
Journal of Internet of Things and Convergence
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v.9
no.6
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pp.93-98
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2023
In paddy rice farming, water management is a critical task. To suppress weed emergence during the early stages of growth, fields are deeply flooded, and after transplantation, the water level is reduced to promote rooting and stimulate stem generation. Later, water is drained to prevent the production of sterile tillers. The adequacy of water supply is influenced by various factors such as field location, irrigation channels, soil conditions, and weather, requiring farmers to frequently check water levels and control the ingress and egress of water. This effort increases if the fields are scattered in remote locations. Automated irrigation systems have been considered to reduce labor and improve productivity. However, the net income from rice production in 2022 was about KRW 320,000/10a on average, making it financially unfeasible to implement high-cost devices or construct new infrastructure. This study focused on developing an IoT-Based irrigation valve that can be easily integrated into existing agricultural infrastructure without additional construction. The research was carried out in three main areas: Firstly, an irrigation valve was designed for quick and easy installation on existing agricultural pipes. Secondly, a power circuit was developed to connect a low-power Cat M1 communication modem with an Arduino Nano board for remote operation. Thirdly, a cloud-based platform was used to set up a server and database environment and create a web interface that users can easily access.
A 10-wk layer feeding trial was conducted to investigate the effects of high quality corn distiller's dried grains with solubles (DDGS) on performance, egg qualities, and yolk fatty acid composition. The economics of using DDGS in the Korean situation was also analyzed. A total of 216 Hy-line Brown layers, 23-wk of age, were employed in this trial consisting of three dietary treatments (0%, 10%, and 20% DDGS), and six replicates per treatment. All experimental diets were prepared as iso-protein (17%) and iso-calorie (2,780 kcal/kg). The use of DDGS up to 20% in layer diets did not affect the feed intake, laying rate, egg weight, and feed conversion ratio (P>0.05). At 5th and 10th wk of the trial, the eggshell color, albumen height, and Haugh unit were not influenced by the DDGS supplementation. At 5th wk of the trial, the eggshell qualities, like eggshell weight, eggshell thickness, and eggshell strength, were not affected by the DDGS feeding; however, these eggshell qualities were decreased at 10th wk due to the 20% DDGS feeding (P<0.05). Yolk color of DDGS 20% increased compared to DDGS 0% at 5th and 10th wk of the trial (P<0.05). At 10th wk, yolk/egg ratio of DDGS 20% decreased compared to DDGS 0% (P<0.05). The yolk fat content was not changed due to DDGS feeding. The monounsaturated fatty acid content of yolk decreased linearly by feeding DDGS (P<0.05). The yolk polyunsaturated fatty acid content of DDGS 20% increased significantly compared to DDGS 0%. The DDGS feeding was not found to affect the degree of yolk fat unsaturation. The cost of feed (₩/kg feed) decreased as the level of DDGS increased. The production costs of egg (₩/kg egg) were cheap in the order of DDGS 10%, DDGS 20%, and DDGS 0%, indicating that DDGS is a viable alternative feed ingredient to corn and soybean meal. In conclusion, high quality DDGS ($L^*$ 61.72) could be used economically up to 20% level without any harmful effect on laying performance: however, the use of DDGS up to 10% is more economical than DDGS 20%.
Kim, Byung-Ki;Yi, Jun-Koo;Hwang, Eun-Gyeong;Kang, Bo-Seok
Korean Journal of Poultry Science
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v.44
no.1
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pp.29-39
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2017
This study examined the effects of adding dried blood mixed with Macsumsuk to the feed of broiler chickens. The blood had been dried at $200^{\circ}C$ in an ultra-high-temperature injection system and mixed in a 70:30 proportion of blood meal to Macsumsuk. The experiment consisted of four treatment groups of 150 chickens each. The control group received common broiler feed only, while treatment groups T1, T2, and T3 received feed supplemented with 0.5, 1.0, and 3.0% of the blood meal/Macsumsuk mixture, respectively. The diets were fed for a total of 35 days. Compared with the controls, body weight gain was improved in groups T1 (1,621 g), T2 (1,749 g), and T3 (1,739 g) (1,621-1,749 g vs. 1,448.5 g, respectively) and feed efficiency increased (p<0.01). The carcass rate in group T3 was higher by 83.26% than that in the controls (75.96 %) (p<0.01). The water holding capacity (WHC) increased in groups T1 and T2 (62.27 and 63.80% respectively) compared with controls (p<0.01). The intestine length was longer in groups T1 and T2 (53.98-55.48) than in controls (45.81) (p<0.01). Adding 0.5-1.0% of the dried blood meal Macsumsuk supplement resulted in a significant reduction in the cholesterol content (39.28~47.34 mg/100 g) compared with the controls (50.44 mg/100 g) (p<0.001); furthermore, the proportions of fatty acids including oleic (C18:1n9), ${\gamma}-linoleic$ (C18:3n6), eicosenoic (C20:1n9), and arachidonic (C20:4n6) acids were significantly increased (p<0.01). Compared with controls, the proportion of unsaturated fatty acids (UFA), mono-unsaturated fatty acids (MUFA), and proportion of UFA / SFA in group T1 was (68.66 vs. 69.35%, 51.22 vs 52.00%, and 2.19 vs. 2.26%, respectively) (p<0.05). However, the amino acid content of cystine and methionine of the treatment group (0.43~0.57%) was significantly higher than that of controls (0.38~0.46%) (p<0.05). Overall, supplementing the feed with 0.5-1.0% of the mixture of blood meal Macsumsuk improved productivity by increasing weight gain and feed efficiency, improved meat quality by increasing the water-holding capacity and levels of unsaturated fatty acids, and improved meat color.
Lignocellulose is difficult to hydrolyze due to the presence of lignin and the technology developed for cellulose fermentation to ethanol is not yet economically viable. However, recent advances in the extremely new field of biotechnology for the ethanol production are making it possible to use of Agriculture residual biomass, e.q., Barley straw, because of their several superior aspects as Agriculture residual biomass; low lignin, high contents of carbohydrates. Barley straw consists of 39.78% cellulose (glucose), 22.56% hemicelluloses and 19.27% lignin. Pretreatment of barley straw using NaOH pretreatment solutions concentration with 2%, temperature $85^{\circ}C$ and reaction times 1 hr were investigates. $NH_4OH$ pretreatment condition was solutions concentration with 15%, temperature $60^{\circ}C$, and reaction times 24hr were investigates. Furthermore, enzymatic saccharification using cellulose at $50^{\circ}C$, pH 4.8, 180 rpm for conversion of cellulose contained in barley straw to monomeric sugar. The pretreatment of barley straw using NaOH and $NH_4OH$ can significantly improve enzymatic saccharification of barley straw by extract more lignin and increasing its accessibility to hydrolytic enzymes. The result showed NaOH pretreatment extracted yield of lignin was 24.15%. $NH_4OH$ pretreatment extracted yield of lignin was 29.09%. Shaccharification of barley straw pretreatment by NaOH for 72hr and pH 4.8 result in maximum glucose concentration 15.39g/L (58.40%) and by $NH_4OH$ for 72hr and pH 4.8 result in maximum glucose concentration 16.01g/L (64.78%).
This study was carried out to investigate the effects of olive oil on the quality characteristics of pressed ham. Five different treatments were tested based on differences in the amount of olive oil added to the pressed ham. As a control, 10% back fat was added without any olive oil. For the first treatment, 5% olive oil replaced a portion of the lard component added to the press ham. For the 2nd, 3rd and 4th treatments, 10%, 15% and 20% of olive oil were substituted for lard, respectively. Pressed ham manufactured with olive oil was vacuum packaged and stored for 1, 7, 14, 21 and 28 days at $4^{\circ}C$. Samples were analyzed for shear force value, sensory properties, TBARS values and fatty acid composition. Shear force values increased significantly during storage for all treatments. No remarkable differences were found in sensory properties (color, flavor, texture, and acceptability) between the control and olive oil treated hams, and there was no clear change with increased storage time. There was no significant difference in TBARS values between the control and olive oil treated hams. The TBARS values increased significantly during storage for all treatments. With regard to changes in fatty acid composition, the contents of C14:0-C20:4 were decreased significantly by the addition of olive oil. The saturated fatty acid and polyunsaturated fatty acid contents of the control were significantly higher than the olive oil treated hams. Higher levels of added olive oil resulted in significantly higher monounsaturated fatty acid contents. Based on these findings, we conclude that the sensory properties and lipid oxidation (TBARS) of manufactured pressed hams are not affected by olive oil addition. These results also indicate that high-quality pressed ham can be manufactured with increased monounsaturated fatty acid content.
This study was carried out to compare the meat quality of beef from Hanwoo supplemented with dietary Rhus verniciflua Stokes (RVS) meal, silicate (Si), and chromium-methionine (Cr-Met) during refrigerated storage. The 26 mon-aged Hanwoo steers were fed basal diets containing 4% RVS, 4% RVS+400 ppm Cr-Met, 1.4% $SiO_2$, or 0.14% $SiO_2+400 ppm$ Cr-Met for 4 mon prior to slaughter. The M. longissimus from carcasses were then stored at $4{\pm}0.2^{\circ}C$ for 7 d. The crude fat content was higher in the Si and Si+Cr-Met groups (p<0.05). The water-holding capacity (WHC) and tenderness were highest in the Si+Cr-Met group (p<0.05). With regard to fatty acids, the polyunsaturated fatty acid (PUFA) content was lower in the Si and Si+Cr-Met groups (p<0.05), and the monounsaturated fatty acid (MUFA) content was lowest in the Si+Cr-Met group (p<0.05). The TBARS and MetMb contents were decreased in the Si, Si+Cr-Met, and RVS+Cr-Met groups. Regarding meat color during storage, the Si+Cr-Met group showed the highest L, a, b, C values and total color, and those of the Si and RVS+Cr-Met groups were higher than the RVS group (p<0.05). Consequently, beef from Si-fed Hanwoo had higher fat content, color and oxidation stability, and lower PUFA content than RVS-fed beef. And beef from Si+Cr-Met-fed Hanwoo had higher WHC, tenderness and color stability, and lower MUFA content than Si-fed beef.
Two experiments were conducted to investigate the influence of dietary supplementation of yeast culture on the nutrient digestibility, performance and meat quality in growing-finishing pigs. Corn-soy basal diets contained 20, 18, and 16% CP and 3,265kcal/kg ME at different growth stages. One hundred and twenty pigs(8wk-old) were allocated into four supplementation levels of yest culture (0, 0.1, 0.2, 0.4%) in Expt 1. Weight gain, feed intake and feed efficiency were periodically recorded for 112 days. A metabolic feeding trial was conducted to measure the nutrient digestibility. Physical and chemical characteristics of the Longissimus Dorsi muscle(LM) from the pigs were measured at the end of experiment (Expt 2). In Expt 1, weight gain and feed efficiency were not different among the dietary treatment groups during the overall period. The digestibilities of protein and fiber were greater in 0.1% and 0.2% yeast culture-supplemented groups than in control (P<0.05). However, fat and ash digestibilities were not improved by the dietary treatment. In Expt 2, the LM protein content in 0.1% yeast culture-supplemented group, but not in 0.2% or 0.4%-supplemented group, was greater than that in the control group (P<0.05). The LM pH, purge loss, cooking loss and color were not affected by the dietary treatment. The LM shearing force was less in 0.2% yeast culture-supplemented group than in the control group (P<0.05). Other LM physicochemical properties did not differ between the dietary treatment groups. Total saturated and unsaturated fatty acids percentages and total cholesterol content of the LM did not differ across the dietary treatment groups.
Lee, Seul Bi;Kim, Jong Won;Bae, Sung Mun;Hwang, Yeon Hyeon;Lee, Heung-Su;Lee, Byeong Jeong;Hong, Kwang Pyo;Park, Chung Gyoo
Korean journal of applied entomology
/
v.57
no.2
/
pp.97-104
/
2018
The larva of the white-spotted flower chafer, Protaetia brevitarsis seulensis (Coleoptera: Cetoniidae), is known to have important medicinal properties, such as anti-cancer activity. However, the consumer market for the larvae is depressed because of its high production cost which needs to be reduced. This study was carried out to evaluate two spent mushroom substrates as food source for chafer larvae to improve the productivity and reduce production cost. The larvae were fed with spent substrates of king oyster mushroom (Pleurotus eryngii) (P-SMS) and shiitake mushroom (Lentinula edodes) (L-SMS), with a control of fermented oak sawdust. Effects of the diets on the development of P. brevitarsis seulensis and contents of minor nutrient components in the larvae produced were examined. In the P-SMS diet, the larval rearing period was shorter at 16.2 days, while the rate of larval weight gain and the cocoon weight were higher at 156.3% and 4.1 g, respectively, than that in the L-SMS diet. The pupation rate was 100% and the adult emergence was higher at 93.3% in the P-SMS diet than in the L-SMS diet with no difference to the control diet. In the P-SMS diet, the total nitrogen content during rearing was higher at 10.28% and the minor nutrient component, particularly Fe (145.8 mg/kg), was higher than that in other diets. The oviposition preference of adults showed no significant difference among the diets. Economic analysis showed that P-SMS costs approximately 667,960 Won less per 100 kg of larvae produced, compared to that of the control diet.
Park, Jae-Hong;Ryu, Myeong-Seon;Gwon, Jeong-Taek;Kim, Sang-Ho;Sang, Byeong-Don
Korean Journal of Poultry Science
/
v.30
no.4
/
pp.219-228
/
2003
Two experiments were conducted to investigate the feeding value of stevia by-product (SB) on performance in broiler chicks and laying hens. In experiment 1, a total 256 one day old male broiler chicks were replaced in 0, 2, 4, 7% of SB with four replicates for 5 weeks. All diets were consisted of isocaloric and isonitrogen containing CP 21.5, 19% and ME 3,100 kcal/kg for starting and finishing period, respectively. Weight gain of SB treatments decreased compared with control for the first three weeks, but no difference for the finishing period. Feed intake and feed conversion were no statistical difference between control and feeding stevia groups for overall period. There were no different total number of intestinal microflora. However, the number of Salmonella and E. coli of cecum seemed to decrease in SB feeding groups. Total Lactobacillus and yeast tended to be higher in those groups than control. The PUFa increased in SB treatments, but was no significance. In experiment 2. stevia by-product(SB) were mixed with iso-caloric and isonitrogeneous method to investigate the feeding value in induced molting hens of 78 weeks old. A total 360 birds were replaced in the four treatments(0, 2, 4, 8% SB) with five replicates. Egg production, quality and fatty acid composition in egg were periodically measured for 20 weeks. No difference were found in egg production, feed intake, feed conversion between control and SB treatments for overall period. Egg shell breaking strength, thickness, albumen height and Haugh unit were not statistically different. However, yolk color was significantly high in SB treatments compared to control(P<0.05). Yolk MUFA increased significantly in SB treatments compared to that of control(p<0.05), but PUFA tended to decrease in SB treatments. No significant difference was detected in total sugar in egg yolk between SB treatments and control. Tocopherol of egg yolk 2 and 4% SB were significantly higher than those feed the control (p<0.05).
Landfill gas is a mixture of methane and carbon dioxide produced by the bacterial decomposition of organic wastes, and it is considered to produce bad smells and pollute the environment. Economic trials and the developments of landfill gas, as an alternative energy resource, become known at the recent years, Resource development of landfill gas, which is managed by Korea up to now, is for the most part generation using gas engine. Medium BTU and High BTU are considered for the power generation as well. Most income of generation using gas engine is selling charge through a power plant. Expecting to manage the power plant for up to 10 years, the analysis based on revenue and expenditure shows when the unit price is 65.2 Won and the operating rate reaches 90%, it is possible to be into the black in 2012 without considering additional financial expense, It was also analyzed that the profit at a unit price of 85 Won under the anticipated rising unit price by the operating rate of 71% is larger than at the operating rate of 90% under limited unit price of 65.2 Won. It means to manage the power plant at a unit price of 65.2 Won and the operating rate must be higher than 90% for economic logicality. If we assume that the operating rate is 90% and it increases the unit price, the unit price must be higher than 85 Won for the management of a power plant. Analysis of changing a unit price, however, might be expected to have a gradual rise of prices. If there is no price rising and additional income related to CDM(Clean Development Mechanism) and emission trading upon Kyoto protocol, the management of a power plant using gas engine will get financial difficulties because of many operating expenses. However, since landfill gas is considered as a worthy energy resource for the guarantee of sustainable development and for the equity between recent generation and future generation, the development of it must be accomplished by the government's additional supporting and efforts under the interest of all stakeholder who are involved.
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