• Title/Summary/Keyword: 양액

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Development of nutrient solution Automatic Controller in Hydroponics (양액 자동공급 장치 개발)

  • 김형준;우영회;남윤일;권영삼
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 1998.05a
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    • pp.83-88
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    • 1998
  • 양액재배는 세계적으로 각광을 받으며 그 면적이 급속히 증가하고 있고 이에 따라 우리나라의 양액재배 면적도 '94년 63㏊에서 '97년 413.9㏊로 급속히 증가하였다. 양액재배의 특징은 양분의 농도를 쉽게 변경하여 공급할 수 있는 장점이 있으나 토양이 갖는 완충능이 감소되는 조건하에서의 재배이므로 항상 작물의 생육에 합치되는 배양액의 관리가 필요하다. (중략)

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The Effect of the Root Intercept Film in the Medium on the Growth and Yield of Hydroponically Grown Cucumber (펄라이트경에서 배지내 격막이 오이의 생육 및 수량에 미치는 영향)

  • 김기덕;이재욱;이응호;문보흠
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 2002.04a
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    • pp.106-109
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    • 2002
  • 우리나라에 널리 보급ㆍ이용되고 있는 양액재배방식중 하나는 펄라이트경이며 대부분 비순환식이다. 펄라이트 재배에서의 적정 양액조성, 양액관리기술 및 배지내 환경조건에 관한 연구가 꾸준히 이루어지고 있다. 한편 적정 수분관리는 작물의 생장뿐만 아니라 경제적, 환경적 측면에서 대단히 중요하다. 따라서 생육단계 및 재배시기별로 급액량을 달리하고 있지만 아직은 비효율적인 측면이 있어 양액소모량이 더 많다. (중략)

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Effects of Concentrated Pig Slurry Using Membrane Filter on the Growth and Yield of Tomato in Nutriculture (막분리 돈분뇨 농축액비를 이용한 양액재배가 토마토의 생육과 수량에 미치는 영향)

  • Ryoo, Jong-Won;Seo, Woon-Kab
    • Journal of Animal Environmental Science
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    • v.14 no.2
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    • pp.119-128
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    • 2008
  • This experiment was conducted to investigate the effects of concentrated pig slurry using membrane filter on growth of tomato in nutriculture. Pig slurry was filtered by ultra filtration and concentrated by reverse osmosis process. Filtration of pig slurry was necessary to prevent the hose clogging in nutriculture. The concentrated pig slurry (CS) and nutrient solution (NS) were mixed by six different mixing ratios of 0:100, 20:80, 40:60, 60:40%, 80: 20 and 100%:0% based on nitrogen content. The chemical nutrient solution was the solution of National Horticulture Research Station for the growth of tomato. The concentration of nutrient solution was adjusted a range of $1.6{\sim}2.0mS/cm$ in EC. The plant height of tomato treated with CS 20+NS 80% was similar with NS 100% control plot. Plant height was highest in the plot of CS 20+NS 80%. The treatment of 100% concentrated pig slurry was lowest in the gowth characteristics of tomato. Number of cluster was very lower in 100% concentrated pig slurry compared with plot of chemical nutrient solution. In the beginning of growth stage, SPAD reading value was reduced in plot treated with CS 100%, but CS 20+NS 80% plot was higher compared to 100% concentrated pig slurry. SPAD value of tomato leaves was decreased as the amount of CS was increased. The SPAD value also in treatment of concentrated pig slurry was lower in the middle growth stage compared to control plot. The dry weight of stem and leaf were 107.4, 104.2g in plot of NS 100% and CS 20%+NS 80%, respectively. The fruit number and weight were decreased at high application plots of concentrated pig slurry, The fruit setting of tomato showed lowest in the plot treated with 100% concentrated pig slurry, and the growth of tomato severely decreased after application of 100% CS treatment. In conclusion, the growth characteristics such as plant height and fruit weight of tomato were not significantly different between the plots treated with mixture of 20% CS +80%NS and 100% nutrient solution treatment. In conclusion, the mixture solution of 20% of concentrated pig slurry and 80% of nutrient solution could be used as a nutrition solution of tomato nuticulture.

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Growth and Microsomal ATPase Activity of Lettuce(Lactuca sativa. L.) Cultured in the $KNO_3-Added$ Nutrient Solution (($KNO_3$를 첨가한 양액에서 상추의 생육 및 마이크로솜 ATPase 활성 변화)

  • Lee, Gyeong-Ja;Kang, Bo-Goo;Kim, Hyun-Ju;Min, Kyeong-Beom;Kim, Young-Kee
    • Korean Journal of Environmental Agriculture
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    • v.20 no.1
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    • pp.28-33
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    • 2001
  • Lettuces were grown hydroponically in three different nutrient solutions, normal and 30 or 50 mM $KNO_3-added$ nutrient solutions, and the electrical conductivities of the nutrient solutions were 1.0, 4.5, and 6.5 dS/m, respectively. Lettuces grown in the $KNO_3-added$ nutrient solutions showed a decrease in the germination ratio and the lower indices of growth, such as plant height, stem diameter, leaf length, and leaf width. Microsomes were prepared from the roots of lettuce and characteristics of microsomal ATPases were investigated. The activities of microsomal ATPases grown in the 30 mM and 50 mM $KNO_3-added$ nutrient solutions were higher than that grown in the normal nutrient solution. The highest activities of microsomal ATPases were observed at pH 7.0 in all culture conditions. The activities of microsomal ATPases were increased in a reaction buffer solution containing high concentration of $K^+$, whereas they were decreased in a reaction buffer containing $Na^+$. The stimulating effect of $K^+$ in the reaction buffer was greater on the microsomal ATPases of lettuces grown in the $KNO_3-added$ nutrient solutions than that grown in the normal nutrient solution. These results imply that the activities of microsomal ATPases in the root tissue are increased as increasing the $KNO_3$ concentration in the hydroponical nutrient solution.

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Growth and Yield Response of Highbush Blueberry 'Duke' to Hydroponic Cultivation (블루베리 '듀크' 품종의 양액재배 시 수체 생장과 수량 반응)

  • Cheon, Mi Geon;Lee, Seo Hyoun;Park, Kyung Mi;Choi, Seong-Tae;Hwang, Yeon Hyeon;Chang, Young Ho;Kim, Jin Gook
    • Journal of Bio-Environment Control
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    • v.30 no.3
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    • pp.244-249
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    • 2021
  • The hydroponic culture for growing 'Duke' blueberry was evaluated in a protective greenhouse provided with similar environmental conditions to the conventional blueberry cultivations. One year old 'Duke' blueberry bushes planted in 180 L containers filled with 130 L peat moss and 40 L pearlite (v/v) were selected for the experiment. A nutrient solution consisted with NO3-N 4.6, NH4-N 3.4, PO4-P 3.3, K 3, Ca 4.6, and Mg 2.2 mmol-1 was supplied to the plants, comparing non-hydroponic treatment (provided with only underground water). Hydroponic culture increased number of shoot per bush by 18% and total shoot length by 24% compared with non-hydroponic culture. Total dry weight of a bush increased in the hydroponic with vigorous root growth 1.4-fold more than the non-hydroponic. Higher concentrations of inorganic elements and organic compounds were found in the hydroponic, indicating active nutrient absorption of the bush. The hydroponic produced high yield similar to adult bush from 4 years old age, maintaining the yield until 8 years old age. The findings of this study indicated that hydroponic cultivation systems will be useful for growing blueberry crop.

Effects of Nutrient Solutions and Their Supplying Frequency on Seedling Growth and Utilization of Minerals in Hydroponic Rice Seedling Raising (벼 수경육묘에서 양액의 종류와 공급시기에 따른 묘 생육과 무기성분의 이용)

  • 김영광;홍광표;정완규;손길만;송근우;강진호
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.3
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    • pp.205-208
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    • 2003
  • This study was conducted to develop a technology for raising rice hydroponically seedlings using the bed in which the seedlings grew in nutrient solution without soil. In Hydroponic rice seedlings, two nutrient solutions (Yashida and Wonsi) were evaluated with four supplying methods $[$3 times (2 days, 8 days and 12 days after seeding), 2 times (5 days and 10 days after seeding), and 1 time (5 days and 10 days after seeding)$]$1, Seedling growth was not different between the two solutions. However, tensile strength of root-mat was higher in Yoshida solution than in Wonsi solution. The more frequent supply of solution resulted in the better seedling growth but in the weaker root mat. Utilization efficiency of the solution minerals was not different in N content regardless of supplying frequencies, but higher in r, K, Ca and Mg when supplied only once on the 5 days after seeding.

Effect of the Mixed Treatment of Electrolyzed Micronutrients with Nutrient Solution and SCB Slurry on Mineral Content and Growth of Cherry Tomatoes (Lycopersicon esculentum) (양액과 SCB액비 처리에 미량요소 첨가가 방울토마토의 미네랄 함량과 생육에 미치는 영향)

  • Ryoo, Jong-Won
    • Korean Journal of Organic Agriculture
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    • v.20 no.3
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    • pp.385-397
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    • 2012
  • A pot experiment was carried out to examined the effect of electrolyzed micronutrients (Fe, Mn, Zn, Sr, Se, Sn, Co, Ti, and V) solution treatments with nutrient solution and SCB slurry on the mineral content and growth of tomato in cherry tomato (Lycopersicon esculentum). The treatment of nutrient solution (NS)+micronutrients solution (MS) significantly increased the concentrations of Li, Zn, Sr, Se, Ti as compared with that of NS alone in the cherry tomato fruits, and SCB+MS solution treatment significantly increased Li, Zn, Se, Co, Sr, and Ti contents as compared with SCB treatment. The micronutrient contents of MN+SCB+MS treatment were significantly higher in Li, Zn, Se, Co and in Ti than those of SCB and NS treatment, respectively. The growth and yield of cherry tomato fruits was highest with NS treatment. The yield indices of cherry tomato treated with NS+MS treatment and SCB+NS+MS were 97% and 94% of NS treatment. In conclusion, it seems to be possible to produce micronutrient-fortified cherry tomato by the mixed treatment of electrolyzed micronutrients.

Numerical analysis for optimal pipe arrangement in nutrient solution cooling system (양액냉각시스템의 배관 배치 최적화를 위한 수치해석 연구)

  • 김문기;김기성;한진희;심상원
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 2003.04a
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    • pp.166-169
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    • 2003
  • 최근 시설원예에서 많이 도입되고 있는 양액재배의 경우 여름철 고온으로 인해 양액온도가 상승하고 그로 인해 양액중 용존산소량이 저하되어 작물생육에 저해를 가져오며 동시에 병원균에 대한 저항정도가 저하하므로 양액냉각법에 의한 생육 촉진효과가 크고 과채류나 엽채류모두 $25^{\circ}C$를 고액온 한계온도로 하여 냉각을 하는 것이 좋은 것으로 보고되었다(교, 1986. 고전, 1987). 또한, 3$0^{\circ}C$의 양액을 24$^{\circ}C$로 냉각해 준 경우 최대 $1.5^{\circ}C$의 작물체온 강하효과가 있는 것으로 보고되고 있다.(남 등, 1992) (중략)

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Responses of Growth and Fruit Yield of Hydroponically Grown Cucumber Plants as Affected by ionic Strength and Growth Stage (생육단계별 양액농도 변환에 따른 오이의 생육 및 수량반응)

  • 정순주;이범선;서범석;김홍기
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 1999.11a
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    • pp.192-195
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    • 1999
  • 작물은 생육단계에 따라 양분의 흡수특성이 다르기 때문에 생육단계별로 적정 양액농도를 구명해야만 영양생장과 생식생장이 병행된 과채류에 있어서 균형을 유지할 수 있다. 노 등(1995)은 토마토의 펄라이트경 양액재배시 육묘기 때에 양액농도를 EC 0.5mS/cm에서 3.0mS/cm로 높임에 따라 유묘의 광합성속도가 증가하였으나 그 이상의 범위에서는 오히려 감소하였으며, 초장, 엽장, 엽폭, 경경 및 지상부 건물중은 양액농도를 0.5mS/cm에서 5.0mS/cm로 높임에 따라 계속 증가한다고 보고하였다. (중략)

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Automatic Control of pH and EC by Programmable Logic Controller in Nutriculture of Tomato(Lycopersicon esculentum Mill.) (토마토의 양액재배시 Programmable Logic Controller에 의한 pH와 EC의 자동조절)

  • 김형준;김진한;남윤일
    • Journal of Bio-Environment Control
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    • v.4 no.2
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    • pp.203-210
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    • 1995
  • Using the programmable logic controller (PLC), a kind of microcomputer, a facility to control EC and pH automatically in nutriculture of tomato was developed. A program for the automatic control of nutriculture was written in ladder diagram language. EC and pH levels of nutrition solution could be maintained at 1.70-1.72 and 6.1-6.5, respectively, during the entire growing period. Better fruits and higher yield were obtained in automatic control plot than in the control plot. Inorganic elements in plant were higher in the former than in the latter.

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