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光波長이 오이(Cucumis sativus L.) 플러그苗의 生長에 미치는 影響
용영록,전지영,황세진,김일섭,정천순 강릉대학교 동해안지역연구소 2000 東海岸硏究 Vol.11 No.1
This research was carried to find out the optimum artificial light condition for plug seedling production of high quality cucumber through investigating growth response of the seedling by both light wave length and treatment period. The treatment with blue and red fluorescent lamp increased the fresh weight involving hypocotyl and root and controlled the elongation of hypocotyl, compared with other treatments. The 30-day-old seedling treatment with blue and red light for 12 hours showed that vegetative growth including root, stem and leaves was better than that of seedling treated with other lamps. Seedling under blue and red light for 12 hours grew 60.0mm and 0.55g in length and weight of hypocotyl. respectively, Hypocotyl length and weight were 44.9mm and 0.62g when seedling was grown under above light condition for 6 hours. Total chlorophyll contents of hypocotyl were highest in the light mixing treatment, and this accelerated greening. Morphological characteristics by investigating cross and longitudinal section of 30-day-old cucumber seedling treated with the mixing fluorescent lamps indicated that epidrmis tissues were usually single layer and thicker, resulting in small, compact and non-intercellular spaces of cells. On the other hand, epidermis tissues of the control composed of large, longer and round cells and cortex tissues showed large intercellular spaces between cells. Longitudinal section of photo-treated hypocotyl showed that there were more shorter cells and non-intercellular spaces of cells than untreated tissues. As a result, blue and red light mixing treatment controled the cell elongation of seedling hypocotyl, resulting in shortening hypocotyl of cucumber seedling.
김록영(Rog-Young Kim),성좌경(Jwa-Kyung Sung),이주영(Ju-Young Lee),김석철(Seok-Cheol Kim),장병춘(Byoung-Choon Jang),김원일(Won-Il Kim),옥용식(Yong-Sik Ok) 한국토양비료학회 2010 한국토양비료학회지 Vol.43 No.3
Chromium as a constituent of rocks occurs naturally in the environment in varying concentrations. However, the human activity has changed the geochemical cycle of chromium in the environment and has caused the chromium accumulation in soils. Korean soils revealed a wide range of chromium contents depending on parent material and land use. The total chromium contents of volcanic ash soils in Jeju, which were determined using HNO₃ + HClO₄ + HF, ranged from 434 to 1,164 mg kg<SUP>-1</SUP>. The ‘ecological’ total chromium contents extracted using conc. HCl + conc. HNO₃ (aqua regia) in the same soils varied in a lower range of 50-189 mg kg<SUP>-1</SUP> (averaged percentage of aqua regia contents in HNO₃ + HClO₄ + HF contents: 14.9%). Serpentine soils in Andong showed a ‘ecological’ total chromium content of 309 mg kg<SUP>-1</SUP> and against it granitic soils in Andong only 20 mg kg<SUP>-1</SUP>. In uncontaminated forest soils of Korea, the ‘ecological’ total chromium contents varied from 4.89 to 106 mg kg<SUP>-1</SUP> and the soluble chromium contents determined using 0.1 M HCl ranged from 0.01 to 0.64 mg kg<SUP>-1</SUP> (averaged percentage of 0.1 M HCl contents in aqua regia contents: 0.4%). Arable lands contained more soluble chromium than reported in forest soils (averaged soluble chromium: 0.36 and 0.09 mg kg<SUP>-1</SUP>, respectively). In particular, the soluble chromium contents in greenhouse, orchard and upland soils were higher than in contaminated soils near mine and industrial site (maximum contents: greenhouse 15.3 mg kg<SUP>-1</SUP>; upland 12.1 mg kg<SUP>-1</SUP>; orchard 8.29 mg kg<SUP>-1</SUP>; mine site 4.76 mg kg<SUP>-1</SUP>; industrial site 2.80 mg kg<SUP>-1</SUP>). On the basis of these results a accumulation of chromium in some specific arable lands can be assumed, probably by long-continued applications of fertilizers or soil amendments containing chromium. In Korean Enforcement Decree of the Soil Environment Conservation Act soil standards for total chromium do not exist yet.
석회와 유기물이 산성 산림토양의 Al과 Pb 불용화에 미치는 영향
김록영 ( Rog-young Kim ),윤정기 ( Jeong-ki Yoon ),김지인 ( Ji In Kim ),박경훈 ( Gyoung-hun Park ),윤성미 ( Sung Mi Yun ),김종모 ( Jong Mo Kim ),알렉산더쉐닝 ( Alexander Schoening ),김태승 ( Tae-seung Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
The toxic effects of Al and Pb on trees, earthworms, and microorganisms in acidic forest soils are well known. As a remedial measure the surfaces of forest soils worldwide have been limed. Depending on the thickness of the organic layer on the forest soils the applied lime leaches with a delay of several years into deeper layers of the mineral soil. Furthermore, the lime applied is often neutralized in the organic layer even before it reaches mineral soil horizons. Therefore, this study was conducted to investigate the effect of liming on soil pH and immobilization of Al and Pbin acidic forest soils aftermixing the lime with the mineral soil. The dolomitelime together with the organic layeron the forest soils was strip wise mixed with the soil material to a depth of 35 cm. The investigation took place 8 months after the treatment. Soil treatment led to significant increases of the pH in the upper 35 cm of the soil. The soil of the untreated control strip was highly acidic with pH(CaCl2)of 3.4-3.7, whereas pH(CaCl2) in the treated strips were between 4.0 and 5.1. The total contents of Al and Pbin soils did not differ from the treated strip to the untreated strip. However, the mobile fractions of Al and Pb were significantly reduced from an average of 362 to 69.3 mg kg-1 for Al and 2.9 to 0.7 mg kg-1 for Pb. This improvedinitial soil conditions will probably lead to an advanced growingfor the planted trees.