• Title/Summary/Keyword: Growing Stage

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Experiment for the duty of Water in paddy fields of New Variety Tongil (IR667) (신품종 통일 벼(IR667)의 용수량측정시험)

  • Hwang, Eun;Kim, Chul-Kyu
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.13 no.4
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    • pp.2439-2444
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    • 1971
  • This experiment is conducted to see the alteration in calculation of amount of duty of water in paddy fields, by the miraculous rice TONG-IL(IR667) made its appearance to us, therefore results obtained were summarized as follow. 1. In comparison with depth of evapo-transpiration and evaporation in the evaporator, the ratio is ET/V=1.84 in clay loam and ET/V=2.00 in loam, the value is larger than any vairety. 2. Comparison by growing periods of rice plants growing period 5 and Ear for mation stage (primor stage) 6 ET/V value grow larger from 3.30 to 3.77. 3. Transpiration ratio is 260.4 in clay loam and 275.0 in loam, two value are less than 300.

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Effect of Dietary Energy Levels for Egg-type Growing Puilets on Pullet Growth, Nutrient Consumption and Subsequent Laying Performance (난용계 육성기 사료의 에너지 수준이 육성계의 성장 및 영양소 섭취량과 산란능력에 미치는 영향)

  • 이규호;정연종
    • Korean Journal of Poultry Science
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    • v.21 no.4
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    • pp.267-275
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    • 1994
  • Three dietary ME levels of 3,200, 2,900 and 2,600 kcal /kg in the same 13% single-stage low protein diet were compared to evaluate the effect of ME levels of grower diets on egg-type pullet growth and subsequent laying performance. As the ME levels of grower diets decreased, cumulative feed and protein consumptions increased(P<0.05), however, the ME intake and body weight at 18 wk of age decreased(P<0.05). Grower feed cost decreased as the dietary ME level was decreased, but no significant difference was found among dietary ME levels of grower diets. During the laying period, sexual maturity, hen-day egg production and average egg weight were not significantly affected by the ME levels of grower diet, however, daily feed intake and feed required per egg decreased as the dietary ME level of grower diet was reduced(P<0.05). Results of this study indicate that pullets can be reared on the low ME diet of 2,600 kcal /kg and it would he economical to utilize the low energy diet during the growing period when they are reared on a 13% single-stage low protein diet.

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Analysis of Environmental Factors for Full Bloom Stage and Fruit Growth in Peach (복숭아 품종의 만개기와 과실 생장에 영향을 미치는 환경요인 분석)

  • Han, Hyun Hee;Han, Jeom Hwa;Jeong, Jae Hoon;Ryu, Su Hyun;Kwan, Yong Hee
    • Journal of Climate Change Research
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    • v.7 no.4
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    • pp.493-498
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    • 2016
  • This study was conducted to investigate the effect of environment factors on full bloom stage and fruit width in four peach cultivars. The average temperature in March was the main factor to determine the date of full bloom in 'Kurakatawase'($-0.6871^*$) and 'Changhowon Hwangdo'($-0.5270^*$). The fruit growth curve after 35 days from full bloom was the double sigmoid shape in 'Changhowon Hwangdo' cultivar. Environmental factors affecting fruit width were mean diurnal range(BIO2) and temperature annual range(BIO 7) in 'Kurakatawase', growing degree days(GDD) after 30 days from full bloom and July precipitation in 'Yumyeong', and annual mean temperature(BIO1), BIO7, and July precipitation in 'Kawanakajima Hakuto'. Of these, major environmental factors affecting fruit width in more than two cultivars were BIO7 and July precipitation.

Basic Studies on the Consumptive Use of Water Required for Dry Field Crops -Tomato and Chinese Cabbage- (밭작물소비수량에 관한 기초적 연구 -토마토 및 가을배추-)

  • 김철기;김진한;최홍규
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.30 no.3
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    • pp.25-37
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    • 1988
  • The purpose of this study is to fmd out the bask data for irrigation plans of tomato and chinese cabbage during the growing period, such as total amount of evapotranspiration, coefficients of evapotranspiration at each growth stage, the peak stage of evapotranspiration, the maximum evapotranspiration, optimum irrigation point, total readily available moisture and intervals of irrigation date. The plots of experiment were arranged with split plot design which were composed of two factors, irrigation point for main plot and soji texture for split plot, and three levels, irrigation points with PF 1.8, PF 2.2, PF 2.6 for tomato and those with PF 1.9, PF 2.3, PF 2.7, for Chinese cabbage, soil textures of silty clay, sandy loam and sandy soil for both tomato and Chinese cabbage, with two replications. The results obtained are summarized as follows 1. There was the highest significant correlation between the evapotranspiration and the pan evaporation, beyond all other meteoralogical factors considered. Therefore, the pan evaporation is enough to be used as a meteorological index measuring the quantity of evapotranspiration. 2. 1/10 probability values of maximum total pan evaporation during growing period for tomato and Chinese cabbage were shown as 355.8 mm and 233.0 mm, respectively, and those of maximum ten day pan evaporation for tomato and Chinese cabbage, 68.0 mm and 43.8 mm, respectively. 3. The time that annual maximum of ten day pan evaporation can be occurred, exists at any stage of growing period for tomato, and at any growth stage till the late of Septemberfor Chinese cabbage. 4. The magnitude of evapotranspiration and of its coefficient for tomato and Chinese cabbage was occurred in the order of pF 1.8>pF 2.2>pF 2.6 and of pF 1.9>pF 2.3>pF 2.7 respectively in aspect of irrigation point and of silty clay>sandy loam>sandy soil in aspect of soil texture. 5. 1/10 probability value of evapotranspiration and its coefficient during the growing period of tomato were shown as 327.3 mm and 0.92 respectively, while those of Chinese cabbage, 261.0 mm and 1.12 respectively. 6. The time that maximum evapotranspiration of tomato can be occurred is at the date of fortieth to fiftieth after transplanting and the time for Chinese cabbage is presumed to he in the late of septemben At that time, 1/10 probability value of ten day evapotranspiration and its coefficient for tomato is presumed to be 74.8 mm and 1.10 respectively, while those of Chinese cabbage, 43.8 mm and 1.00. 7. In aspect of only irrigaton point, the weight of raw tomato and Chinese cabbage were mcreased in the order of pF 2.2>pF 1.8>pF 2.6 and of pF 1.9>pF 2.3>pF 2.7, respectively but optimum irrigation point for tomato and Chinese cabbage, is presumed to be pF 2.6 - 2.7 if nonsignificance of the yield between the different irrigation treatments, economy of water, and reduction in labour of irrigaion are synthetically considered. 8. The soil moisture extraction patterns of tomato and Chinese cabbage have shown that maximum extraction rate exists at 7 cm deep layer at the beginning stage of growth m any soil texture and that extraction rates of 21 cm to 35 cm deep layer are increased as getting closer to the late stage of growth. And especially the extraction rates of 21 cm deep layer and 35 cm deep layer have shown tendency to be more increased in silty clay than in any other soils. 9. As optimum irrigation point is presumed to be pF Z6-2.7, total readily available moisture of tomato in silty clay, sandy loam and sandy sofl becomes to be 19.06 mm, 21.37 mm and 20.91 mm respectively while that of Chinese cabbage, 18.51 mm, 20.27 mm, 21.11 mm respectively. 10. On the basis of optimum irrigation point with pF 2.6 - 2.7 the intervals of irrigation date of tomato and Chinese cabbage at the growth stage of maximum consumptive use become to be three days and five days respectively.

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Effect of Rice Seedling Growth According to Wetting Agents and Growing Media (상토 유형별 계면활성제 처리가 수도 유묘 소질에 미치는 영향)

  • Kim, Sun-Taek;Kim, Hong-Gi;Chio, Yun-Pyo;Cha, Hui-Jung;Lee, Moon-Sub;Bok, Tae-Gyu;Lee, Hee-Bong
    • Korean Journal of Agricultural Science
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    • v.37 no.2
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    • pp.171-175
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    • 2010
  • This study was carried out to find the effect on growing media and proper time for water supply in rice seedling stages. Plant height of rice seedling for SIPAN-BRL among current several growing medias was higher in Chuchungbyeo than Ilpumbyeo, and that of root length was higher in check among used growing medias. Fresh and dry weight of shoot and root of two rice cultivar. Water time to absorption on each treatment of growing media concentration took similarly in SIPAN-BNH and check were similar. But 500 minutes did in 100ppm and did 370 and 470minute in 300 and 500ppm, respectively. Wilting time of rice seedling was appeared highly at 300ppm of SIPAN-BRL in Chuchungbyeo and 100ppm of SIPAN-BRL in Ilpumbyeo, while it prolonged at 300ppm in Chuchungbyeo and 500ppm in Ilpumbyeo, respectively. Water content at wilting stage was appeared highly at SIPAN-BRL 500ppm in both Chuchungbyo and Ilpumbyeo, while SIPAN-BNL was high in 300ppm of Chuchung-byeo and Ilpumbyeo, respectively. Plant and root length of SIPAN-BNL treated with 300ppm in 10day-rice seedling were highly appeared, while dry weight of shoot was high at 300ppm SIPAN-BNL.

Study on the Evapotranspiration of Crisphead Lettuce by the Weighing Lysimeter (Weighing Lysimeter에 의한 결구상치의 증발산량 조사연구)

  • 김시원;김선주;노희수
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.28 no.4
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    • pp.41-48
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    • 1986
  • This study was fulfilled by the weighing lysimeter method at the experimental farm of KonKuk University from April to June of 1986 to investgate the amount of evapotranspiration ( ET-lettuec )by the growing periods, evapotranspiration ratio, amount of watering per one time, days of intermission and soil moisture extraction pattern of the crisphead lettuce cultivated in the clay loam soil by different watering points of pFl.7, pF2.O, pF2.7. The results obtained are summar ized as follows : 1.The total evapotranspiration(ETlettuce) of the pFl.7 treatment plot was 358,9mm., 314.9mm in the pF2.O plot and 281.8mm in the pF2.7 plot, therefore the total ETlettuec increased with the difference of 33mm-44mm by the decrease of watering point. 2.The daily maximum ETlettuce by the watering points was 7.66mm, 6:54mm, 5.98mm, respectively in the last ten days of May, and the mean daily ETlettuce during the growing season by the watering points of pFl.7, pF2.O and pF2.7 was 5.44mm(384.5g), 4.77mm(337.2g) and 4.27mm(301.8g), respectively. 3.The evapotranspiration ratio showed maximum value in the middle of May which was the beginning of mid-season stage, and the mean evapotranspiration ratio during the total growing period was 1A7, 1.29, 1.15 by the watering points. 4.The days of watering intermission by the watering points of pFl.7, pF2.O and pF2.7 was 1.0day, 2.9days and 12.Sdays, respectively. 5.The yield of the crisphead lettuce by the watering treatments showed very high significance, and the pF2.O was confirmed as a optimum watering point. 6.The soil moisture extraction pattern(SMEP) of the pF2.0 treatment plot in the initial stage was 85.6% in the 1st and 2nd soil layer and 14.4% in the 3rd and 4th layer, and in the midseason stage, the moisture extraction proportion of the under layer accounted for 34.7%which showed that the root elongated to the lowest soil layer, and there was no difference of the SMEP between the mid-season and late-season stage. 7.The correlation coefficient between the ETlettuce and yield of lettuce by the three watering points was.739, which showed the significance of 5%.

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Growth Analysis of Maize with Tillers (분얼형 옥수수의 생장분석)

  • Kang, Kwon-Kyu;Lee, Hee-Bong;Lee, Won-Ku;Choe, Bong-Ho
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.34 no.3
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    • pp.280-287
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    • 1989
  • In order to know growing habit of the maize bearing tillers, IK//IRI/B68 with tillers was grown and compared with Jinjoo Ok which is not tillering, and several parameters were measured for analysis. The results obtained were summarized as follows. 1. The plant height and fresh weight of IK//IRI/B68 were lower than those of Jinjoo Ok until the tasseling stage of IK/ /IRI/B68, while then plant height and fresh weight of IK//IRI/B68 were higher than those of Jinjoo Ok after the tasseling stage of IK//IRI/B68. 2. The average number of tillers per plant of IK//IRI/B68 at maturity was 3.7 and the average tiller height of IK//IRI/B68 was almost the same as the height of the main stem. 3. The dry weight of IK//IRI/B68 at the early growing stage was lower than the check hybrid Jinjoo Ok, while it was higher than Jinjoo Ok at the later growing stage. 4. The LAI of IK//IRI/B68 after full expansion of the leaves was greater than that of Jinjoo Ok The LAIs of IK//IRI/B68 and Jinjoo Ok were 12.6 and 5.8, respectively. 5. The CGR of Jinjoo Ok was greater than that of IK//IRI/B68 until earey July while the CGR of Jinjoo Ok was lower than that of IK//IRI/B68 as the tillers of IK//IRI/B68 were fully developed. 6. The LAR and RGR of IK//IRI/B68 were greater than those of Jinjoo Ok until mid-July. The RGR of IK//IRI/B68 seemed to be affected by both NAR and LAR. The RGR of Jinjoo Ok seemed to be affected by LAR.

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Growth Characteristics and Variation of Reproductive Physiology in SCNT Cloned Male Hanwoo Calves (체세포 복제 한우 수송아지의 성장 특성과 번식생리적 변화)

  • Bae, Seong-Hun;Yang, Byoung-Chul;Ko, Yeoung-Gyu;Oh, Keon-Bong;Seong, Hwan-Hoo;Min, Kwan-Sik;Park, Eung-Woo;Park, Soo-Bong;Hwang, Seong-Soo
    • Journal of Embryo Transfer
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    • v.24 no.3
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    • pp.177-182
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    • 2009
  • This study was conducted to investigate the variation of growth characteristics and reproductive physiology in cloned Hanwoo male calves during growing stage. The hematological parameters, body weight, and plasma hormonal levels, birth to 12 months, were analyzed in the cloned calves (n=3). Differences among treatment means were determined by a student t-test. A probability of P<0.05 was considered statistically significant. The hematological parameters, such as white blood cell, red blood cell, and platelet, were not different in both normal and cloned calves. The difference of body weight, however, was significantly higher in the cloned calves, $5{\sim}6$ months (p<0.05) and $7{\sim}12$ months (p<0.01), than that of the comparators, respectively. The plasma IGF-1 level was statistically significant in the cloned calves, $5{\sim}10$ months, compared to that of the normal calves (p<0.05). However, the plasma testosterone level was not different in both normal and clone calves according to growing stage. Taken together, the cloned Hanwoo male calves are growing faster and maintaining a normal reproductive physiology.

Single-Stage High Power Factor Two-Switch Forward Converter (단일전력단 고역률 Two-Switch Forward 컨버터)

  • Bae, Jin-Yong;Kim, Yong;Cho, Kyu-Man;Lee, Eun-Young;Lee, Kyu-Hoon
    • Proceedings of the KIEE Conference
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    • 2006.04b
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    • pp.247-250
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    • 2006
  • This paper presents the single-stage High Power Factor TSFC(Two-Switch Forward Converter). Recently, due to growing concern about the harmonic pollution of power distribution systems and the adoption of standards such as ICE 61000-3-2 and IEEE 519, There is a need to reduce the harmonic contents of AC line currents of power supplies. This research proposed the single-stage two switch forward circuit for low voltage and high current output. The principle of operation, feature and design considerations are illustrated and verified through the experiment with a 200W(5V, 40A) 200kHz MOSFET based experimental circuit.

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Evapotranspiration and Grain Yield in Responses to Different Soil Water Conditions in Soybean

  • Yang, Jae-Hwang;Kim, Wook-Han;Seong, Rak-Chun;Hong, Byung-Hee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.45 no.4
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    • pp.241-244
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    • 2000
  • This experiment was conducted to evaluate the effect on evapotranspiration and yield of soybean according to different soil water conditions, and to find the optimum time and amount for irrigation in soybean cultivation. The difference between potential evapotranspiration (PET) and maximum evapotranspiration (MET) during growing season of soybean planted in lysimeter was higher during reproductive stage than during vegetative one. The maximum crop coefficient was obtained at beginning seed stage of soybean. Soil water coefficient of irrigation treatment was higher than that of non-irrigation treatment during soybean growth stage in field experiment. Grain yield was highest in lysimeter due to its high water use efficiency and evapotranspiration rate.

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