• Title/Summary/Keyword: Cultivation Environment

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Vegetables Cultivation by Characteristics Changes of Water with Magnetic Field Effect (자기장 영향 하에서의 수질 특성 변화에 따른 채소재배)

  • Lee, Hyung-Joo;Hwang, Jae-Moon
    • Journal of Bio-Environment Control
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    • v.15 no.4
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    • pp.412-416
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    • 2006
  • A magnetic field oscillator was designed and made. The oscillator was installed around a water pipe and radiated into water which was provided for vegetables cultivation. The oscillator was made with a helmholtz coil and installed a magnetic field sensor inside. The class E amplifier circuit with frequency variance was also used. Hydroponic and soil cultural methods were used for cultivation of lettuce and chinese cabbage with magnetic field water and without. Vitamin C ingredients in the lettuce and chinese cabbage which were grown with magnetic field water were 2.8 times and 1.2 times higher than without the magnetic water. Moreover, the growth acceleration effect of vegetables was shown in lettuce cultivated with the magnetic field water.

Estimating Potential Growth of Single-node Cuttings for Applying Single-stemmed Rose to Factory System (장미 공장생산시스템 적용을 위한 Single-node 삽목묘의 잠재생장)

  • Kim, Wan-Soon;Lee, Yong-Beom;Nam, Yoon-Il;Kim, Hyung-Jun
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • 2001.04b
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    • pp.79-80
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    • 2001
  • This study was conducted to estimate rooting and shooting in single-node cuttings (SNC) of roses 'Rote Rose' and 'Teresa' to several conditions: growth stage, node position, and leaf area of cutting, so that single-stemmed roses (SSR) could be used in rose factory system. There was no effects of growth stage of flowering shoots far cutting on the rooting and shooting of SNC in both of the two cultivars. However, the node position and leaf area of cuttings significantly affected the rooting and shooting of SNC: the speed was accelerated with larger leaf area and upper node cuttings, but the rate showed little difference as above 95%. Based on above results, rooting and shooting in SNC was forced by leaf area mainly, followed by node positions. On the other hand, flowering rate of shoots from SNC was improved mainly with larger leaf area in cuttings. Shoots of 45cm-longer, qualified for rose factory system, increased with lower node and larger leaf area significantly. Therefore, it could be said that the potential growth of shoots from SNC would be influenced mainly by leaf area, followed by node position on cutting.

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Discharge of the Pollutants from Rice Paddies during the Period of Cultivation (경작기 농경배수에 의한 오염물질의 배출)

  • An, Ik-Sung;Kim, Youngchul;Lee, Dong-Ryul
    • Journal of Korean Society on Water Environment
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    • v.23 no.2
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    • pp.266-273
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    • 2007
  • In this study, discharge of the pollutants from the rice paddies during cultivation and its pattern were investigated. The pH in the returned and rainfall water from ten different paddies was between 6.9 and 7.4, which is not associated with the cultivation time and farming style of individual paddy. TN and TP concentrations were highest in the beginning of first top dressing (fertilization), which indicates that proper top dressing and returned water management is crucial to reduce their discharge loads. In particular, TN concentration was more or less constant until tillering stage. This is thought to be due to the runoff of soil-adsorbed nitrogen and compost. Average SS concentration in the returned and rainfall water was 28 mg/L, and organics was predominantly soluble form, and highest COD 25 mg/L during transplanting, lowest 11.3 mg/L and average 11.3 mg/L. Density of TC (total coliform bacteria) was from 1000/100 mL to 114,000/100 mL and FC (fecal coliform) was 5 to 16% of TC density.

A study on Ontology Modelling for Autonomous Context Decision Logic in Vertical Farming (수직 농업 자율 컨텍스 결정을 위한 온톨로지 모델링에 관한 연구)

  • Young Goun Jin;Won Goo Lee
    • Smart Media Journal
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    • v.13 no.6
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    • pp.72-79
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    • 2024
  • Vertical farming is one of the important solutions to overcome future food and population problems. However, underdeveloped countries can't afford due to high initial investment costs and technical huddles. To solve this problem, it is necessary to formalize the vertical farming area using ontology. In this paper, we present an ontology that includes various cultivation methods of vertical farming, connects sensors and actuates according to the methods, and recognizes and controls the cultivation environment context of the selected vertical fanning, we expect to be able to autonomously make control decisions about the context by analyzing the environmental context that is important for perceived vertical cultivation using the logical reasoning function of ontology.

Effect of Cultivation Type in Different Greenhouses on Growth and Yield of Green Pepper (Capsicum annuum) (시설유형별 재배방식이 풋고추 생육과 수량에 미치는 영향)

  • Hee Chun;Kyung Je Kim;Young Hoe Woo
    • Journal of Bio-Environment Control
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    • v.10 no.4
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    • pp.225-231
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    • 2001
  • This study was conducted to examine effect of different environment conditions in glass, PC, PET and PE greenhouses controlled by different environment control systems on the growth of green pepper. Light transmittance of 64.7% in the glass greenhouse was the highest among different green-houses. Air temperature was the highest in the glass greenhouse when ventilators were closed, and was the highest in the PE greenhouse when ventilators were open. Air relative humidity was the highest in the PE greenhouse during 24 hours. The amount of solar energy accumulated in soil was the greatest in the glass greenhouse and this energy released during the night escaped through covering materials. Latent heat and solar energy affected air temperature increased in greenhouses. The air temperature of glass greenhouse was 27.5$^{\circ}C$ at 11 O clock, which was the highest air temperature among the all greenhouse types. Clear differences were observed in leaf area and plant height at 30 days after transplanting. Days to first flowering was the shortest in the glass greenhouse with 72.7 days. Flower shedding was the greatest in the PE greenhouse with 12.6%. Days to fruit harvesting was the shortest in the glass greenhouse with 14.3 days. Fruit quality, such as fruit length, fruit diameter, fruit flesh thickness, and vitamin C content, was the best in the glass greenhouse. Percent marketable fruits was the highest with 95.3% when the pepper was grown hydroponically in the glass greenhouse.

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Effect of Lignin Biochar Application on Kimchi Cabbage Cultivation (리그닌 바이오차가 배추 재배에 미치는 효과)

  • Han-Na Cho;Jae-Hyuk Park;Jin-Ju Yun;Seung-Gyu Lee;So-Hui Kim;Ju-Sik Cho;Se-Won Kang
    • Korean Journal of Environmental Agriculture
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    • v.42 no.4
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    • pp.353-357
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    • 2023
  • This study evaluated the effect of lignin biochar on Kimchi cabbage cultivation in an upland field. Each of the inorganic fertilizers (IF, applied at 32-7.8-19.8 kg/10a=N-P-K), lignin biochar (LBC, applied at 1,000 kg/10a), improved LBC (LBC+N, applied at 1,000 kg/10a), and LBC+IF treatments areas were separated by a control (Cn) treatment area. The fresh weight of Kimchi cabbage increased in the order LBC+N > IF > LBC+IF > Cn > LBC treatments, and the length and width of the leaf were ranged from 20.8-25.7 and 13.7-15.8 cm/plant in all treatments. After Kimchi cabbage harvesting in the LBC+N treatment, soil quality improved bulk density, pH, OM, TN, and Av-P2O5 than those other treatments. In addition, the total N2O flux in LBC+N LBC+N was lower than in IF treatments. Therefore, improved lignin biochar application effectively improves Kimchi cabbage cultivation and can benefit the agricultural environment.

Evaluation of Disease Resistance of Rice Cultivar Developed in North Korea (북한에서 육성된 벼 품종의 병 저항성 검정)

  • Chung, Hyunjung;Kang, In Jeong;Yang, Jung-Wook;Roh, Jae-Hwan;Shim, Hyeong-Kwon;Heu, Sunggi
    • Research in Plant Disease
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    • v.25 no.3
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    • pp.108-113
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    • 2019
  • Almost 30% of arable lands of North Korea are covered with paddy rice. In rice cultivation of North Korea, rice blast disease is the most important fungal disease and bacterial leaf blight is the most important bacterial disease. Seven North Korean rice cultivars had been tested for the disease resistance against rice blast pathogen, Magnaporthe oryzae and bacterial leaf blight pathogen, Xanthomonas oryzae pv. oryzae. The responses of seven cultivars against 17 different M. oryzae races from South Korea had been quite different. Among seven cultivars, Giljoo1ho was very resistant to all 18 different M. oryzae isolates from South Korea, nevertheless KI or KJ. Pyungdo5ho was very susceptible, it showed susceptible responses to 8 out of 10 KI races and 7 out of 8 KJ races of M. oryzae isolated in South Korea. However, the response to bacterial leaf blight was different from the response to rice blast pathogen. Gijoo1ho, Wonsan69ho, Onpo1ho, and Pyungdo15ho were susceptible to KXO42 (K1) and KXO90 (K2), respectively. Pyungdo5ho was resistant to KXO85 (K1) and KXO19 (K3), and Pyungyang21ho was resistant to K1 races. Based on these results, Giljoo1ho can be a good resource for the breeding of resistant rice cultivar against M. oryzae isolates from South Korea.

Estimation of the Second Flight Season of Chilo suppressalis (Lepidoptera: Crambidae) Adults in the Northeastern Chinese Areas (중국 동북부 지역에서 이화명나방(Chilo suppressalis)(Crambidae) 2화기 성충 발생 시기 추정)

  • Jung, Jin Kyo;Kim, Eun Young;Yang, Woonho;Lee, Seuk-Ki;Shin, Myeong Na;Yang, Jung-Wook;Ju, Hongguang;Jin, Dongcun;Pao, Jin;Wang, Jichun;Zhu, Feng
    • Korean journal of applied entomology
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    • v.61 no.2
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    • pp.335-347
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    • 2022
  • We investigated the emergence patterns of Chilo suppressalis (Lepidoptera: Crambidae) adults using sex pheromone traps in the three northeastern areas, Dandong (40°07'N 124°23'E) (Liaoning province), and Gongzhuling (43°30'N 124°49') and Longjing (42°46'N 129°26'E) (Jilin province), China, in 2020 and 2021. Two times of adult flight seasons were isolated clearly during the rice growing periods in the all areas, in which the first season from mid May to late July, and the second season from mid July to mid September were observed. The adult emergence seasons in the areas at higher latitude were later than that at lower latitude. Using the adult emergence data during the first flight seasons, the second flight seasons were estimated through insect phenology modelling, and compared with the observed data. Temperature-dependent life history models (developmental rate, development completion, survival rate, adult aging rate, total fecundity, oviposition completion, and adult survival completion) were collected or constructed for each life stage of C. suppressalis, in which the data from the four previous studies were used. Those models were combined in an insect phenology estimation software, PopModel, and operated for the observed areas. In the results, the phenology modelling operated with the models based on the data of shorter larval periods in the previous studies estimated more accurately the second flight seasons. In 2021, we investigated the change of damaged hill ratios of rice with observing the adult emergence at Dandong and Longjing, 2021. The increase periods of damaged hill ratios of rice were observed two times during the total rice cultivation season, which may be caused by different generations of C. suppressalis larvae.

Analyzing Issues on Environment-Friendly Agriculture Using Topic Modeling and Network Analysis (토픽모델링과 네트워크분석을 활용한 친환경농업 이슈분석에 관한 연구)

  • Shin, Ye-Eun;Shin, Eun-Seo;Kim, Sang-Bum;Choi, Jin-Ah;Kim, Myunghyun;Han, Seokjun;An, Kyungjin
    • Journal of Korean Society of Rural Planning
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    • v.29 no.4
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    • pp.35-53
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    • 2023
  • This study attempts to identify the flow of key topics and issues of research trends related to environment-friendly agriculture conducted around the 2000s in South Korea and compare them with the environment-friendly agriculture promotion plan to seek the level of consistency and the direction of future development of environment-friendly agriculture. For the analysis of environment-friendly agriculture research trends and policy consistency, 'topic modeling', which is suitable for subject classification of large amounts of unstructured data, and 'text network analysis', which visualizes the relationship between keywords as a network and interprets its characteristics, were utilized. Overall, active discussions were held on 'technical discussions for the production and cultivation of environment-friendly agricultural products' and 'food safety & consumer awareness', and keywords such as production, cultivation, consumption, and safety were consistently linked to other keywords regardless of time. In addition, it was found that the issue of environment-friendly agriculture was partially consistent with the policy direction of the period. Considering the fact that the ongoing '5th Environment-Friendly Agriculture Promotion Phase' emphasizes the strengthening of rural environment management and aims to ensure the continuous quantitative and qualitative development of environment-friendly agriculture, active discussions and research on its environmental contributions and management methods are needed.