• 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.

• Korean Journal of Soil Science and Fertilizer
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• v.14 no.4
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• pp.236-241
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• 1982

A pot experiment was carried out to evaluate the effect of a newly developed micronutrient fertilizer made of local mineral ores by the molten process. Chinese cabbage was used as the test crop and cultured on sandy loam soil to be highly responsive to applied micronutrients. The following results have been obtained from the experiment. 1. By the application of micronutrient fertilizer, the yield of chinese cabbage was increased about 30 to 40 percent compared to control. 2. Boron uptake by plants was remarkably increased in micronutrient fertilizer treatment, but the uptake of the others was not significantly. 3. After cultivation, boron content was high in micronutrient fertilizer treatment, however, the others was same as control.

• Journal of Korean Society of Environmental Engineers
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• v.36 no.5
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• pp.317-324
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• 2014

Environmental tobacco smoke (ETS) samples were collected separately in mainstream and side-stream smoke using a self-designed smoking machine, and a total 40 of PM2.5 was collected with low volume air sampler at indoor environments with and without ETS in Daejeon, Korea. About 20 trace elements including toxic metals like As, Cr, Mn, Se, V, and Zn were determined in PM2.5 and ETS samples by instrumental neutron activation analysis (INAA). It is found that the emission factors of K, Cl, Na, and Al were much higher than those of toxic elements for both mainstream and side-stream smoke. The average concentration of PM2.5 was enriched by 1.5 times at smoking area ($58.7{\pm}18.1{\mu}g/m^3$) than at smoking free area ($38.6{\pm}12.7{\mu}g/m^3$). The concentration ratio of each element between smoking and smoking free area were ranged from 1.1 to 6.0 except Cu (1.0); especially, Ce (6.0), La (5.2), K (2.3), and Co (2.0) showed higher ratio, which suggests that the ETS is one of the possible increasing factors of PM2.5 and elemental concentration at indoor environment.

• Applied Biological Chemistry
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• v.44 no.4
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• pp.240-245
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• 2001

Suppression of nitrate accumulation in vegetables through foliar application of micronutrients was investigated. Spinach and lettuce were grown in pots under greenhouse condition. Micronutrient solutions containing Cu, Mn, Mo, and Zn were used; chitosan was added into one and the other contained chitosan oligomers. The micronutrient solutions were sprayed on the leaves at 3 and 4 weeks after transplanting of 20-day-old seedlings. Plants were harvested at 5-weeks after transplanting. Yield, contents of chlorophyll, Brix value, micronutrient, and nitrate, and nitrate reductase activity were measured. Fresh weights of lettuce and spinach were significantly increased by the foliar application of micronutrients. Contents of chlorophyll and micronutrients were higher in micronutrient-treated plants, while those of nitrate were reduced by about 10 and 14-23% in lettuce and spinach, respectively. Compared to the control plants, nitrate reductase activity was higher in plants treated with micronutrients. Results of this study indicate the effect of micronutrients on the suppression of nitrate accumulation was relatively small in comparison to the contents of nitrate in leaves of spinach and lettuce. To maximize the effect, nutrient composition in solution, application time, and frequency should be further examined, taking into consideration nitrogen level in soil and other environmental factors including light condition.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.317-318
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• 2001

PM$_{10}$ 대기먼지는 자연적이고 인위적인 발생원에 의해 다양한 미량원소들을 함유하고 있기 때문에 흔히 대기질이나 환경영향 평가를 위한 대기관측시료로 이용되고 있으며, 특히 PM$_{2.5}$ 먼지의 질량농도와 특정원소의 농도가 높을 때, 장\ulcorner단기적으로 인체 보건에 큰 영향을 미치는 것으로 알려져 있다. 중성자 방사화분석법은 핵반응을 통해 생성시킨 방사성동위원소로부터 방출되는 방사선을 검색하여 절대적으로 성분원소를 정량하는 핵분석기술(Nuclear Analytical Techniques)중의 하나로서 소량의 시료로부터 미량 원소의 비파괴, 동시 다원소 분석이 가능하고 분석감도($10^{-3}$ - $10^{-7}$$\mu\textrm{g}$)가 탁월한 분석기술이다. (중략)략)

• Korean Journal of Environment and Ecology
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• v.12 no.1
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• pp.22-29
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• 1998

This study is investigated for the trace element concentration in the soils derived from different parent rocks, which are serpentinites, metamorphic rocks and black shales, and the absorption of the trace element by Pinus rigida in Hongseong and Keumsan, Chungnam, respectively. The concentrations of nickel, chrominium and cobalt are high in the serpentinites, whereas the concentrations of zinc, molybdenium and iron are high in the metamorphic rocks. These elements in black shale are lower than those in serpentinites and metamorphic rocks. The serpentine soils show high nickel, chrominium and cobalt content, while zinc and iron content are high in the mixed soils(serpentinites + metamorphic rocks) and black shales. Comparing with parent rocks, all of trace elements in their weathered soils are low. The pH of serpentine soil is high, 7.73~9.55 and that of black shale soil in 5.61. In serpentine area, the absorptions of chrominium by P. rigida is lower than its in the soils. The absorption of zinc by P. rigida is high relative to zinc concentration in soils. The Co/Ni and Fe/Ni quotient in P. rigida over serpentine soils are considerably lower than those growing over other soils tpes.

• The Journal of the Petrological Society of Korea
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• v.3 no.1
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• pp.41-48
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• 1994

Three USGS rock standards (G-2, W-2, and BHVO-1) are decomposed by three different methods, such as open beaker, microwave oven, and alkali fusion method, to compare the effect of decomposition methods for trace elememt analysis in the rock samples. Solubilized trace elements are measured with inductively coupled plasma mass spectrometer (ICP-MS). Generally the analytical results of trace elements between open beaker and microwave digestion method are not different. In case of alkali fusion method, some volatile elements such as Pb, Cu, and Rb are considerably lost. Using acid digestion method, Zr and Hf concentrations are lowered in case that these elements are concentrated in refractory minerals. The concentrations of rare earth elements are generally consistent with the recommended values, but due to large dilution factor, there are some analytical problems in alkali fusion method.

• Radioisotope journal
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• v.15 no.4
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• pp.60-63
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• 2000

• Life and Agrochemicals
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• s.251
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• pp.12-15
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• 2009

우리나라는 병해충 발생이 많고 토양도 너무나 척박하다. 친환경농자재의 효과는 논란의 중심에 서 있다. 특히 화학제품을 이용한 미량원소가 함유될 수 없기 때문에 미량원소 결핍현상도 자주 나타난다. 효과가 중요하지만 친환경농자재에서 효과를 얘기하는 것도 어려움이 많다. 양자를 조화시킨 한국형 과학영농이 논의되어야 할 시점이다.

• Proceedings of the KSEEG Conference
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• 2007.04a
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• pp.55-57
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• 2007