• 제목/요약/키워드: Controlled horticulture

검색결과 137건 처리시간 0.028초

딸기 생육단계별 일사비례제어 급액 방법에 따른 딸기 생육 비교 (Comparison of Growth Characteristics of Strawberry according to Integrated Solar Radiation Control by Growth Stages)

  • 김소희;노미영;최경이;임미영
    • 생물환경조절학회지
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    • 제31권4호
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    • pp.279-285
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    • 2022
  • 딸기 수경재배 시 일사비례제어를 이용하여 생육단계별 적정 누적일사량 기준을 설정하고자 수행하였다. 급액 방법은 외부 일사량을 기준으로 일정 누적 일사량에 도달하면 급액하였고 누적 일사량 기준은 150, 200J·cm-2과 생육단계에 따라 200J·cm-2에서 150J·cm-2로 변경하는 처리를 두었다. 타이머 제어는 대조구로 설정하였다. 월별 평균 급액 횟수는 누적 일사량이 많은 3월에 150 J·cm-2과 생육단계별(150J·cm-2) 처리구가 5.6회, 누적일사량이 적은 12월에 200J·cm-2과 생육단계별(200J·cm-2) 처리구가 2.7회, 타이머는 3.6-3.8회였다. 수분이용효율은 주당 총 급액량이 적었던 타이머 처리구가 19.8g·L-1로 일사제어 처리구에 비해 낮았다. 일사제어에 따른 생육 및 과실 특성은 차이가 없었다. 생육단계별 처리구가 총 상품과 수량은 주당 328g, 상품과율 85.3%로 가장 높았다. 딸기 수경재배 시 일사비례 급액제어 방식은 재배기간 동안 동일한 누적일사량 기준보다 생육단계별로 누적일사량을 조절하는 것이 과실의 수량 향상에 도움이 되었다.

Variation of Microbial Communities with Crop Species in Controlled Horticultural Soils of Gyeongnam Province

  • Lee, Young-Han;Lee, Seong-Tae;Kim, Eun-Seok;Cho, Yong-Cho;Ok, Yong Sik;Kim, Min-Keun;Kim, HyeRan
    • 한국토양비료학회지
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    • 제46권3호
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    • pp.182-186
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    • 2013
  • In this study, we examined the chemical properties and microbial community characteristics in 25 controlled horticultural soils (CHS) sampled from Gyeongnam Province by fatty acid methyl ester (FAME) method. The electrical conductivity of watermelon CHS was significantly (p < 0.05) higher than those of red pepper CHS, pumpkin CHS, and strawberry CHS. The amounts of total FAMEs, total bacteria, gram-negative bacteria, gram-positive bacteria, and fungi were significantly (p < 0.05) higher in red pepper CHS than those in strawberry CHS and pumpkin CHS. In addition, higher (p < 0.05) ratios of cy19:0 to $18:1{\omega}7c$ were detected in tomato CHS than those in watermelon CHS, pumpkin CHS, and red pepper CHS. This implied that microbial communities of tomato CHS were stressed more than other species of cultivation soils. Actinomycetes community in red pepper CHS was significantly (p < 0.05) higher than those in tomato CHS, strawberry CHS, and watermelon CHS. Differences in soil microbial community composition were highly associated with cultivated crop species which might result from the management inputs such as fertilizer, herbicide, and irrigation.

Trends of Several Air Pollutants and the Effects of Ozone on the Plant Antioxidant system in Platanus occidentalis in Korea

  • Woo, Su-Young
    • 한국산림과학회지
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    • 제95권2호
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    • pp.183-187
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    • 2006
  • This study investigated concentrations of the several air pollutants and compared antioxidative enzyme activities on Platanus occidentalis because this tree species is one of the widespread street trees in Korea. This species has been emerging the ambient air pollutants during its growing periods. The purpose of this study was to identify the relationship between air pollution on the tree species and antioxidant enzyme activities on the trees. $O_3$, $NO_2$, CO and $SO_2$ concentrations of several cities in Korea were compared for last decades. Among the air pollutants, $O_3$ and $NO_2$ concentrations in six big cities in Korea showed similar increasing trends during this period. In contrast, $SO_2$ and CO concentrations in the same cities dramatically decreased between 1994 and 2005. Platanus occidentalis trees were controlled to investigate, ascorbate peroxidase (APX) and glutathione reductase (GR) activity. Ozone exposure generally increased APX and GR activities of tree seedlings. It is a typical compensatory strategy of stressed trees.

Inheritance of Pigeonpea Sterility Mosaic Disease Resistance in Pigeonpea

  • Daspute, Abhijit;Fakrudin, B.;Bhairappanavar, Shivarudrappa B.;Kavil, S.P.;Narayana, Y.D.;Muniswamy, Muniswamy;Kaumar, Anil;Krishnaraj, P.U.;Yerimani, Abid;Khadi, B.M.
    • The Plant Pathology Journal
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    • 제30권2호
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    • pp.188-194
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    • 2014
  • A comprehensive study was conducted using PPSMV resistant (BSMR 736) and susceptible (ICP 8863) genotypes to develop a segregating population and understand the inheritance of PPSMV resistance. The observed segregation was comparable to 13 (susceptible): 3 (resistant). Hence, the inheritance was controlled by two genes, SV1 and SV2, with inhibitory gene interaction.

Establishment of Genetic Transformation System and Introduction of MADS Box Gene in Hot Pepper (Capsicum annuum L.)

  • Lim, Hak-Tae;Zhao, Mei-Ai;Lian, Yu-Ji;Lee, Ji-Young;Eung-Jun park;Chun, Ik-Jo;Yu, Jae-Woong;Kim, Byung-Dong
    • Journal of Plant Biotechnology
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    • 제3권2호
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    • pp.89-94
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    • 2001
  • In vitro plant regeneration of inbred breeding line of hot pepper (Capsicum annuum L.) was established using leaf and petiole segments as explants. About 28 days old plants were excised and cultured on MS medium supplemented with TDZ and NAA or in combination with Zeatin. In all of the media compositions tested, combination of TDZ 0.5 mg/L, Zeatin 0.5 mg/L, and NAA 0.1 mg/L was found to be the best medium for shoot bud initiation. Young petiole was the most appropriate explant type for the plant regeneration as well as genetic transformation in hot pepper. In this study, HpMADS1 gene isolated from hot pepper was introduced using Agrobacterium-mediated transformation system. Based on the analysis of Southern blot and RT-PCR, HpMADS1 gene was integrated in the hot pepper genome. It has been known that floral organ development is controlled by a group of regulatory factors containing the MADS domain. Morphological characteristics in these transgenic plants, especially flowering habit, however, were not significantly altered, indicating this MADS gene, HpMADS1 may be non-functional in this case.

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Effects of Culture Type and Inoculation Quantity in Bioreactor on Production of Potato Plantlets

  • Choi Ki Young;Son Sung Ho;Lee Joo Hyun;Lee Yong-Beom;Bae Jong Hyang
    • 생물환경조절학회지
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    • 제14권4호
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    • pp.298-301
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    • 2005
  • Potato (Solamum tuberosum 'Dejima') plantlets were investigated on culture type and initial quantity of inoculation in bioreactor and survival rate by hydroponics for mass production. rode stems (1 to 1.5cm in length) of potato plantlets multiplied in vitro were grown for 3 weeks in liquid Murashige and Skoog (MS) medium with sucrose $30 g\; L^{-1}$. When plantlets (80-node inoculation) were raised in 10L balloon type bubble (BB) bioreactor, the healthiest growth of plantlets was obtained from explants cultured in ebb & flow culture with medium supplied periodically 12 times per day. The suitable inoculation quantity of 20L BB bioreactor was 120 pieces of stem segments (mean 2.2g fresh weight) in ebb & flow culture. Number of nodal shoot was eight on the average. In controlled culture room, survival rate of plantlets at 7 days after stem cutting was above $70\%$ when they were acclimatized by hydroponics grown in deep flow and solid medium culture. The highest survival rate of the stem cutting plantlets was in nutrient solution adjusted to EC $1.4dS{\cdot}m^{-1}$. Stem cutting plantlets through one culture could be obtained $670\~900$, when plantlets were grown in ebb & flow culture during 3 weeks using a 20L bioreactor with initial 120 pieces of nodal segments. 11 is possible In do mass production of seedlings cultured in bioreactor and hydroponics.

고밀식 사과원에서의 간벌이 '후지'/M.9 사과나무의 영양생장, 생산량 및 과실품질에 미치는 영향 (Influence of Tree Thinning on Vegetative Growth, Yield and Fruit Quality of 'Fuji'/M.9 Apple Trees in the High Density Orchard)

  • 권헌중;사공동훈
    • 한국환경농학회지
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    • 제42권2호
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    • pp.104-111
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    • 2023
  • As apple trees mature, it is important to maintain good light distribution within the canopy to produce marketable fruits. Tree thinning is the selective removal of a proportion of trees growing in the orchard to provide more growing space and a good light environment for the remaining trees. This study was conducted over 3 years (14-16 years after planting) to investigate the influence of tree thinning on vegetative growth, yield, fruit quality, and blooming in the 14 years old slender spindle 'Fuji'/M.9 apple trees planted with the tree space of 3.2×1.2 m. The trees were placed in a control group (no thinning; 260 trees per 10 a) or a tree thinning group (thinned 50% of the control; 130 trees per 10 a). The tree thinning successfully improved light penetration, yield per tree, fruit red color, and yield efficiency for 3 years, and the tree thinning controlled the occurrence of biennial bearing. However, tree thinning significantly decreased accumulated yield per 10 a compared with the control. The vegetative growth, yield per tree, soluble solid contents, and blooming were not clear by the occurrence of biennial bearing in the control. These results indicated that tree thinning was a good method for improving light penetration and preventing biennial bearing in the old 'Fuji'/M.9 high-density apple orchards.

고농도 칼륨처리를 활용한 원통형 종이포트 토마토묘의 도장억제 (Control of Stretching of Tomato (Lycopersicon esculentum Mill.) on Cylindrical Paper Pot Seedling Using High-Salinity Potassium Fertilizers)

  • 수찬;김시홍;김대훈;김재경;허재윤;넉탕부;최기영;김일섭;장동철
    • 생물환경조절학회지
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    • 제29권4호
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    • pp.354-364
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    • 2020
  • 본 연구는 원통형 종이포트를 활용한 토마토 육묘시, 염스트레스를 활용하여 고온기 도장 억제가능성을 검토하기 위하여 수행되었다. 시험구는 K2SO4, KCl과 KH2PO4을 각 5, 10 dS·m-1로 처리하였고, 또한, 토마토 모종에 고염도의 칼륨을 처리하여 수분 및 저온스트레스 환경에서의 적응성 및 생존성을 조사하였다. 조사결과, 처리 농도가 높아질수록 지상· 하부 건물중, 옆면적, 순동화율 (NAR)이 감소하고, 경경과 충실도는 증가하였다. 수분 스트레스 처리 이후, 대조구는 심한 위조현상을 보였지만, KCl처리구는 양호하였다. 상대수분함량은 대조구에서 23%, KCl처리구에서 8% 감소 하였다. 또한, 대조구에 비하여 KCl 처리구는 저장시(9, 12 및 15℃ 모종의 손상 비율이 낮았다. 이와 같은 결과로 보아, KCl과 같은 고농도의 칼륨 처리가 원통형 종이포트 토마토 육묘의 도장 억제에 효과적이며 환경 스트레스 내성을 향상시키는 것으로 판단된다.

시설원예에 있어서 식물기생선충 조사 (Survey on Plant Parasitic Nematodes in Cropping by Controlled Horticulture)

  • 최동노;최영연
    • 한국응용곤충학회지
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    • 제21권1호
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    • pp.8-14
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    • 1982
  • 시설원예에 있어서 식물에 기생하는 선충의 종류와 분포 그리고 작부체계에 따른 선충의 밀도을 알기위하여 경남북 주요 시설원예단지 6개소를 대상으로 총 70개포장에서 조사한 결과를 요약하면 다음과 같다. 1. 시설원예단지에 있어서 조사포장에 대한 주요 식물기생선충의 속별 출현빈도는 Meloidogyne가 $91.4\%$로 가장 높고 다음이 Tylenchus $87.1\%$, Hirschmanniella $24.3\%$, Aphelenchus $23.3\%$, Aphelenchoides $20\%$ Merlinius $14.3\%$, Pratylenchus $14.3\%$ 순이였다. 2. 지역별 선충밀도를 보면 Meloidogyne는 남지가 2104마리로 가장 높고 다음으로 밀양이 671마리 삼낭진이 401마리 순이며 Tylenchus는 성주가 57마리로 가장 높았으며 Pratylenchus는 구포가 127마리로 가장 높았고 Aphelenchoides와 Criconemoides는 각각 26마리로 34마리로 삼낭진에서 가장높게 나타났다. 3. 지역별 작부체계에 따른 선충의 밀도를 보면 남지는 대대분 고추-오이 작형, 밀양은 고추-배추 작형이었으며 Meloidogyne의 밀도가 가장 높았고 삼낭진은 대부분 딸기-휴작 작형이었으며 Meloidogyne와 Pratylenchus의 밀도가 가장 높았다. 구포는 공히 토마토-배추 작형이며 Pratylenchus와 Meloidogyne의 밀도가 가장 높고 성주와 유천은 수박-벼, 고추-벼 작형이었으며 전반적으로 선충의 밀도가 매우 낮았다. 4. 시설원예에서 가장 문제시되는 선충은 Meloidogyne와 Pratylenchus이고 다음으로 지역과 작물에 따라서 다르나 Tylenchus, Aphelenchoides, Merlinius, Criconemoides라고 사료된다. 5. 시설원예단지에 있어서 식물에 기생하는 선충은 총 2목 10과 13속 15종이 발견되었다.

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시설 온실에서 진딧물에 대한 무인 연무방제기의 방제 효과 보고 (A Report on the Control Effects of Automatic Dry Fog Sprayer on Aphids in Greenhouse Crops)

  • 강택준;김세진;김동환;양창열;김형환;조명래
    • 한국응용곤충학회지
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    • 제53권4호
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    • pp.479-483
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    • 2014
  • 1990년대 초반 이후 국내 시설 원예작물 재배면적은 급격히 증가하였지만 농가당 재배면적은 협소하여 생산성 증대를 위한 생력관리기술개발이 절실히 요구되고 있다. 하지만 시설하우스에서는 해충들이 다발생하고 방제가 어려워 많은 양의 살충제를 사용하고 있어 생력재배를 어렵게 하고 있다. 또한 과도하고 부적절한 살충제의 사용은 저항성 해충의 출현과 농약중독이라는 문제를 야기하였다. 본 연구에서는 시설 재배 온실에서 무인 연무방제기를 이용한 목화진딧물(Aphis gossypii)과 복숭아혹진딧물(Myzus persicae)의 효율적 방제 가능성을 조사하였다. 무인 연무방제기를 가동시키는 동안 시설 내 측창과 출입구가 완전히 폐쇄된 조건하에서는 시설 내 상대습도가 높게 유지되었고(>95%) 관행방제 약제처리구와 유사한 방제 효과를 보였다(방제가 61.0~94.1%). 반면 무인 연무방제기 가동 시간 동안 측창과 출입구를 50% 정도 개방한 조건에서는 시설 내 상대습도가 상대적으로 낮았고(<95%) 측창과 출입구가 모두 폐쇄된 온실 조건보다 방제 효율이 낮았다(방제가 36.0~54.4%).