• Journal of Bio-Environment Control
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• v.15 no.3
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• pp.217-224
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• 2006

Objective of this research was to determine the effect of application rate of dolomite in root media containing micronutrient mixes on growth of marigold 'Orange boy' in plug trays. To achieve this, three granular micronutrient mixes such as HF 1, MF 2, and MF 3 were produced and incorporated into three root media, peatmoss+composted pine bark (1:1, v/v, PB), peatmoss+composted rice-hull (1:1, v/v, PR), and peatmoss+composted saw-dust (1:1, v/v, PS), with a rate of $0.3g{\cdot}L^{-1}$. Elevated application rate of dolomite in PB medium containing MF 1 decreased crop growth at 35 days after sowing with the highest fresh and dry weight in the control treatment of dolomite. The treatments of 3.0 and $6.0g{\cdot}L^{-1}$ of dolomite in PB medium containing MF 2 produced 0.133g of dry weight and 0.686g of fresh weight, respectively, which were the highest among treatments of dolomite. But the treatments of 3.0 and $6.0g{\cdot}L^{-1}$ of dolomite in PB medium containing MF 3 produced the highest fresh and dry weight, respectively. Elevated application rate of dolomite in PR medium containing MF 1, 2, and 3 resulted in decrease of fresh an dry weight. The relative growth suppression induced by elevated application rate of dolomite was more severe when MF 3 were incorporated than MF 1 and 2. The treatments of 3.0 and $6.0g{\cdot}L^{-1}$ of dolomite in PS medium containing MF 1 and 3 showed good growth, but elevated application rate of dolomite in PS medium containing MF 2 and control resulted in increase of dry and fresh weight. These results indicated that the application rate of dolomite should be adjusted by kinds of root media and micronutrient mixes.

• Korean Journal of Environmental Agriculture
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• v.25 no.3
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• pp.217-227
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• 2006

Micronutrient status in soils and crops of plastic film house and their relationship were investigated. Total 203 plastic film houses were selected (red pepper, 66; cucumber, 63; tomato, 74) in Yeongnam region and soil and leaf samples were collected. Hot-water extractable B and 0.1 N HCl extractable Cu, Zn, Fe, and Mn in soil samples and total micronutrients in leaf samples were analyzed. Contents Zn, Fe, and Mn in most of the investigated soils were higher than the upper limits of optimum level for general crop cultivation. Contents of Cu in most soils of cucumber and tomato cultivation were higher than the upper limit of optimum level, but Cu contents in about 30% of red pepper cultivation soils were below the sufficient level. Contents of B in most soils of cucumber and tomato were above the sufficient level but in 48% of red pepper cultivation soils B were found to be deficient. Micronutrient contents in leaf of investigated crops were much variable. Contents of B, Fe, and Mn were mostly within the sufficient levels, while in 71% of red pepper samples Cu was under deficient level and in 44% of cucumber samples Cu contents were higher than the upper limit of sufficient level. Contents of Zn in red pepper and cucumber samples were mostly within the sufficient level but in 62% of tomato samples Zn contents were under deficient condition. However, any visible deficiency or toxicity symptoms of micronutrients were not found in the crops. No consistent relationships were found between micronutrient contents in soil and leaf, and this indicates that growth and absorption activity of root and interactions among the nutrients in soil might be important factors in overall micronutrient uptake of crops. For best management of micronutrients in plastic film house, much attention should be focused on the management of soil and plant characteristics which control the micronutrient uptake of crops.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.88-91
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• 1998

최근 급속한 산업발달로 인하여 환경오염이 날로 심화되고 있으며, 특히 재배적인 측면에서 토양이나 수질의 중금속오염 문제가 크게 우려되고 있다. 이 중 Cu와 Zn은 식물체의 탄수화물이나 단백질 합성 및 여러 가지 효소 작용에 필수적인 원소이지만 그 양이 과다하면 철 결핍 증상과 비슷한 잎의 황화(chlorosis)현상을 일으킨다. 한편, humus내에 함유되어 있는 humic acid는 양액에 첨가하면 다가의 양이온과 결합하여 난용성 염을 형성하고 (중략)

• Proceedings of the Korean Society of Toxicology Conference
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• 2001.05a
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• pp.163-163
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• 2001

Selenium (Se) is an essential micronutrient for mammals and its biological functions are mediated by selenoprotein. In tissues, Se is incorporated into the selenoprotein by recognition of the UGA codon as a stop codon for selenoprotein. Phospholipid hydroperoxide glutathione peroxidase (PHGPx) is an antioxidant selenoprotein that belongs to the superfamily of selenium-dependent peroxidase.(omitted)

• Proceedings of the Korean Society of Toxicology Conference
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• 2001.05a
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• pp.162-162
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• 2001

Selenium is an essential micronutrient for mammals and its biological functions are mediated by a selenoprotein. The mitochondrial capsule selenoprotein (MCS) is a selenoprotein that is necessary for the maintenance and stabilization of the sperm mitochondrial membrane.(omitted)

• Clinical and Experimental Pediatrics
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• v.58 no.10
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• pp.363-368
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• 2015

Inflammatory bowel disease (IBD) is a chronic inflammatory disease mainly affecting the gastrointestinal tract. The incidence of the disease is rapidly increasing worldwide, and a number of patients are diagnosed during their childhood or adolescence. Aside from controlling the gastrointestinal symptoms, nutritional aspects such as growth, bone mineral density, anemia, micronutrient deficiency, hair loss, and diet should also be closely monitored and managed by the pediatric IBD team especially since the patients are in the development phase.

• Journal of Plant Biology
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• v.27 no.4
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• pp.215-222
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• 1984

The reversal effect of salicylic acid(SA) on inhibition of flowering in Lemna gibba $G_3$ grown on ${NH_4}^+$-free 1/2H medium under continuous light is modified by ${PO_4}^{2-}$- and $Ca^{2+}$ levels. Dimethylsulfoxide(DMSO) either depresses the SA effect in ${NH_4}^{1}$-free 1/2H medium or amplifies it in E medium. The dual action of DMSO determined by relative levels of macro and micronutrient components is discussed.

• Journal of Crop Science and Biotechnology
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• v.10 no.2
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• pp.64-72
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• 2007

Iron is an important micronutrient for plants. Iron metabolism is a complex mechanism under a delicate balance. Iron metabolism represents two major problems for plants: deficiency as a consequence of solubility problems and toxicity due to excess solubility in anaerobic conditions. In the last few years, new genes have been discovered that influence iron uptake, transport and storage. Irrigated rice is exposed to high levels of $Fe^{II}$, normally rare in aerobic soil conditions. The implications of altering iron uptake rates and the effects of newly discovered genes are discussed.

• Korean Journal of Soil Science and Fertilizer
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• v.14 no.2
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• pp.88-94
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• 1981

A trial manulacturing of the micronutrient fertilizer made of local mineral ores was conducted. A powdered mixture of raw materials was fused in an electric furnance and the molten matrix was quenched, dried and milled. Some informations from the manufacturing were summarized as followings. 1. Of all the ore minerals, only borax and manganese ores could be molten independently. 2. Borax was the best material for decreasing the molten temperature. 3. The molten temperature was increased with increased Ca and Mg content of the mixture. 4. The amounts of 2 % citric acid soluble Fe, Zn, and Mo were increased rapidly with increased temperature, but those of B and Mn were constant. 5. During the manufacturing process, the nutrient loss was high in order of boron, zinc and molybdenium.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.144-144
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• 2017

Micronutrients such as zinc (Zn), iron (Fe), manganese (Mn) have important roles for development and growth in plants but it also have roles in animals and humans. In previous studies, a Korean weedy rice, KH2J was selected to have tolerance to heavy metal, lead (Pb) compared with a cultivar, Milyang23. To identify QTLs for micronutrients concentration in grain, an F2 population (120 plants) were developed from a cross between KH2J and an indica rice cultivar, Milyang23. To measure the concentration of eight ions, Zn, Fe, Mn, Pb, calcium (Ca), copper (Cu), cadmium (Cd) and arsenic (As), grains were collected and digested with 65% nitric acid, and the ion contents were measured using inductively coupled plasma mass spectrometry. A total 27 putative quantitative trait loci (QTLs) were detected on 12 chromosomes by single point analysis and 22 putative QTLs were detected by composite interval mapping. The co-locations of QTL for Zn, Fe and Mn were observed on chromosome 5. The QTLs for Cd, Cu and Zn were co-localized on chromosome 10, and QTLs for Zn, As and Mn was on chromosome 12. The Zn concentration in F2 generation showed significant correlation with concentrations of As (r = -0.4), Cu (r = 0.5) and Fe (r = 0.2) (P < 0.01). Also, the Ca concentration was significantly related with Mn and Fe concentrations (P < 0.01). Fine mapping of these QTLs is underway to analyze their functional relationship.