• 한국초지조사료학회지
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• 제21권4호
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• pp.191-202
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• 2001

Experiments were conducted on established grassland sward at Gongiam, Kwangju, and Kyung-gi in Korea from 1995 to 1997. The influence of mineral-N fertilizer or animal manure(AW) on herbage dry matter(DM) yield, N yield, the recovery of AM-N, and soil N and organic matter(0M) content in the mixed sward('potomac' orchardgrass, 'fawn' tall fescue, and 'kenblue' Kentuky bluegrass) was investigated. The treatments were replicated three times in a split plot block design. AM(the main plots) was applied at 200kg N ha ' year ' on each plot. The types of AM were cattle feedlot manure(CFM), pig manure fermented with sawdust(PMFS) and Korea native cattle slurry(KNCS). Three levels of mineral-N fertilizer, as urea, ranging from 0 to 200kg N $ha^{-1}\;year^{-1}$ in 100kg increments, were superimposed on each plot. The fertilizers and AM were applied in two equal dressings(the end of March and middle of November). AM and mineral fertilizer had significant effects(p<0.05) on herbage DM and N yields. Herbage yields in KNCS were higher than those in CFM and PMFS(p

• 한국약용작물학회지
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• 제23권2호
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• pp.125-131
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• 2015

In this study, we determined the ingredient analysis of harvested garlic bulb and soil analysis of four garlic-cultivated regions in Jeju, being one of the major areas of Namdo garlic production. Soil pH and electric conductivity were 7.02 and 1.03 dS/m, respectively. Soil organic matter was 4.31%. The mineral elements (potassium, calcium, magnesium, sodium, iron, manganese, copper and zinc) of Namdo garlic cultivated soil were analyzed by ICP, and calcium was the most highly contained mineral with $14.67cmol_+/kg$ and in the decreasing order of magnesium ($2.25cmol_+/kg$), potassium ($1.51cmol_+/kg$). Soluble solid and total acidity were 7.60 oBrix and 0.49%, respectively. The mineral contents of garlic bulb were in order of potassium (12,728 ppm) > sulfur (7,778 ppm) > phosphorus (4,916 ppm) > magnesium (691 ppm) > calcium (359 ppm). The content of total phenolic, total flavonoid and reducing sugar were 71.14 mg GAE/100 g, 17.64 mg QE/100 g and 26.53 mg GE/g, respectively. Alliin and allicin were 8.78 mg/g and 2.10 mg/g, respectively. The Pearson's correlation coefficients between mineral contents of soil and garlic bulb are analyzed. Macronutrients of soil is correlated with macronutrients of garlic (positive) and micronutrients of garlic (negative) contents.

• 아시안잔디학회지
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• 제7권2_3호
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• pp.129-135
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• 1993

Surface soils and aerial parts of Korean lawn(Zoysia koreana) at normal fair way of 4 golf courses and yellow discolored fairway of one golf course in Kyonggi province were taken at and analyzed for mineral contents in soil Mg and Ca were most deficient while EC was too high and phosphorus was exess. There were significant positive correlation between pH and Ca and between EC and total N. There was no consistent simple correlation between single component in soil and plant, indicating the involvement of multi-minerals in one mineral absorption. m mineral contents of aerial part Mg was severely low. potassium moderately but Ca was normal, Mg and Ca showed significant correlation in aerial part, yellow-discolored lawn showed the lowest content of Mg in aerial part and surface soil. Very high N and high phosphorus in aerial part inspite of low P in soil. The above facts indicates Mg deficiency in fair way soils in most golf courses resulting in yellow-discoloration in lawn.

• Journal of Plant Biology
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• 제26권2호
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• pp.53-71
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• 1983

Physicochemical properties of soil, mineral cyclings, production of plants, and relationship between sodium(Na) content and progresses of plant communities were studied in a coastal salt marsh in Incheon. Contents of Na, available phosphorus(A-P) and value of electric conductivity of soil decreased in order of Salicornia herbacea, Limonium tetragonum, Phragmites communis and Zoysia sinica communities, but contents of organic matter, total nitrogen(T-N) and calcium(Ca) of soil were vice versa. Specise diversity index decreased with increase of Na content of soil with correlation coefficient of -0.82. The aboveground biomass of plant communities were 2,981 g.dw/$m^2$ in P. communis, 1,471 g.dw/$m^2$ in Z. sinica, 189g.dw/$m^2$ in S. herbacea and 71 g.dw/$m^2$ L. tetragonum, respectively. Seasonal changes of contents of inorganic nutrients per unit land area coincided with those of biomass of plant communities, however, the maximum contents of K occured earlier than the maximum biomass. Amounts of inorganic nutrients absorbed by plant were directly proportion to its biomass and it was true to reverse in restored amounts of them to soil. In turnover times of nutrients of the communities, it took the shortest time for P but the longest for Ca and P. communis community took the shortest but L. tetragonum the longest. For example, in P. communis turover time of P took one year and that of Na 1,440 years. Lack of P element, therefore, was expected in this study area.

• 한국지하수토양환경학회지:지하수토양환경
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• 제17권5호
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• pp.68-74
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• 2012

The objective of this study is to examine a releasable asbestos sampler developed for measuring friable asbestos from soil to air controlled by wind velocity and water contents. Asbestos contaminated soil with 3.75% at the Sinsuk-asbestos mine was sampled, air-dried and sieved to 100 mesh, then homogenized during 24 hours' agitation. Various wind velocities, 1 m/s, 2 m/s, 3 m/s, and 5 m/s, were applied to evaluate releasable characteristics of the releasable asbestos sampler. In addition, soils with 1.0%, 3.4%, 4.4%, 11.0%, 16.2%, and 20.0% of water contents were also examined the amount of friable asbestos by the releasable asbestos sampler. Collected soil and air samples were analyzed by polarized light microscopy (PLM) and phase contrast microscopy (PCM), respectively. Those contents were applied to calculate an excess life cancer risk (ELCR). This study also discussed the relationship with risk assessment by a weeding scenario of activity based sampling (ABS) and field applied releasable asbestos sampler. The result was shown that friability of asbestos in soil increased with wind velocity and decreased with water content. In comparison with ELCR results, over 10E-4 of cancer risk was found in condition on < 5% water content and > 3m/s wind velocity.

• 한국토양비료학회지
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• 제5권1호
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• pp.17-23
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• 1972

밭 토양 특히 신 개간지 토양에서 결핍되기 쉬운 무기성분을 종합적으로 함유하는 종합 무기성분 거름을 제조하여 그 비효를 조사하기 위하여 우리나라 주로 모임별 토양을 공시하여 시험한 결과 1. 자실수량은 산성모암인 화강암을 모재로한 토양에서 그도의 종수 효과를 보였으나 염기성 모암인 현무암 및 혈암을 모재로한 토양에서는 그 시용효과가 없었다. 2. 화강암을 모재로한 토양에서는 C.M.F시용량에 비례하여 자실수량이 증가하였으나 현무암 및 혈암토양에서는 C.M.F. 1수준(118.5kg/10a)에서는 약간 증수하는 경향이었으나 2수준(237.0kg/10a)에서는 오히려 감수하는 경향이였다. 3. C.M.F 시용에 따른 식물체중 양분함량변화는 점소는 염기성모암을 모재로한 토야에서는 별 차이가 없으나 산성모암을 모재로한 토양에서는 감소하는 경향이었으며 칼슘함량은 이와 반대의 경향을 보였으며 인산, 마그네슘 및 붕소는 각 토양에서 공히 증가하였고 가리는 화강암을 모재로한 숙전토양에서는 약간 감소하였으며 그외 토양에서는 모두 증가하였다. 또한 이들 양분의 식물체중 흡수량은 C.M.F. 시용으로 각 성분 공히 증가하는 경향이었으며 자실수량과의 관계는 1~5%의 정의 상관관계를 보였다. 4. C.M.F시용에 따른 작물 수확후 토양중 잔류양분함량 변화를 보면 질소 및 치환성 망강 함량은 감소하였으나 pH, C.E.C., $Av-P_2O_5$, Ex-CaO, Ex-MgO 및 수용성 붕소 함량은 현저히 증가하였다. 또한 토양중 잔류된 무기양분 함량과 자실수량과의 관계를 보면 Ex-CaO. 및 Ex-MgO 함량과는 1%수준의 정상관관계를 치환성 망강량과는 1%수준의 부상관관계를 보였다.

• 한국작물학회지
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• 제44권2호
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• pp.129-133
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• 1999

Excessive soil water at vegetative growth stages during the rainy season induces yield losses in soybeans. Our objectives were to obtain basic information about the cultivar differences and to understand the stress-tolerance process for due to excessive soil water. Previous experiments revealed soybean genotypic differences in tolerance to excessive soil water. A field experiment was conducted at the Research Farm of Korea University near Seoul on 21 May 1998. Soybean[Glycine max (L.) Merrill] cultivars, 'Hannamkong' (sensitive) and 'Taekwan-gkong'(tolerant) were planted in vinyl-lined plots(1.2 x 4.2 x 0.3 m deep) and control plots. Drip irrigation began at VI growth stage to submerge the soil surface. Three weeks of excessive soil water treatment reduced all growth parameters measured to soybean plants. Excessive soil water stress resulted in decreases of N, P, K, Ca, Mg and Cu, and increases of Fe and Mn contents in soybean leaves. The stress index of tolerant cultivars under excessive soil water showed no large difference in soybean growth characteristics measured at three growth stages. However, K, Ca, Mg, Fe and Mn contents in soybean leaves appeared to differ between sensitive and tolerant cultivars. From the above results, stress and tolerance indices are proposed for a method to test cultivar differences in plant responses within a species under adverse growth environments.

• Asian-Australasian Journal of Animal Sciences
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• 제19권8호
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• pp.1139-1147
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• 2006

This study was conducted to evaluate the trace elemental nutritive values of soil and forages collected from southwestern part of the province of Punjab, Pakistan. Soil and forage samples were collected fortnightly for two seasons. The concentrations of some trace minerals varied greatly among seasons and sampling periods. Seasonal effects were found in all soil micro-minerals except zinc, while forage iron, zinc, and selenium were affected by seasonal changes. Sampling periods effects were observed in all soil minerals and in forage copper, iron, zinc, and manganese only. All soil mineral levels except cobalt and selenium were sufficiently high to meet the requirements of plants for normal growth during both seasons. In contrast, soil Co and Se levels were severely deficient during both seasons and considered inadequate for plant growth. Soil Fe, Zn, Co, and Se levels were higher, and Cu and Mn lower during winter than those during summer. Forage Zn levels during summer were at marginal deficient levels, and in contrast, all other forage micro-minerals were within the required range for ruminants during both seasons. Although forage mico-minerals were within the range required by the ruminants, they were not sufficiently high to prevent the predisposition to various diseases caused by nutrient deficiency. Consequently, grazing animals at this location need continued mineral supplementation of these elements with a mixtures of high bio-availability rather than of high micro-mineral contents to support optimum ruminant productivity.

• 한국대기환경학회지
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• 제12권3호
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• pp.263-268
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• 1996

This study was conducted for the assessment of the effects of acid rain and soil fertilizers on photosynthetic rate, was content, and contact angle on 5-year seedlings of Japanese red pine (Pinus densiflora Sieb. et Zucc.) leaves. The seedlings were exposed to pH 3.0 (simulated acid rain), pH 6.5 (groung water) and rain (pH around 4.6). The seedlings were also treated with $Ca(OH)_2, Mg(OH)_2, and Ca(OH)_2 + Mg(OH)_2 + C.F.(compound fertilizer)$. Photosynthetic rate, stomatal conductance, was content, contact angle value, and mineral nutrient content of the leaves were measured and the results were as follows: 1. Photosynthetic rate and stomatal conductance of the leaves increased with the increase of pH. Photosynthetic rate and stomatal conductance increased with application of soil fertilizer in the pH 3.0 treatment, but showed no changes in the rain and the pH 6.5. 2. Contact angle value and was content of the leaves did not change with the pH treatment, but increased with the fertilizer treatments. 3. Mineral nutrient contents of the leaves were lowest in the rain treatment and highest in the pH 6.5 treatment. The increase of mineral nutrient contents was observed with the soil fertilizer treatments.

• 한국초지조사료학회지
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• 제12권3호
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• pp.138-144
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• 1992

This study was carried out to determine the effects of lime(0, 300 kg/lOa) and phosphate application( 0, 20, 40, 80 kg/lOa) on mineral contents in herbage when 5 pasture species(orchardgrass, tall fescue, perennial ryegrass, redtop and ladino clover) were grown in pot of black(B) and very dark brown (VDB) volcanic ash soil of Cheju island, respectively. P content of orchardgrass and perennial ryegrass were higher in VDB than in B (P<0.01), but other grasses were not different between two soil types. Also, Ca and Mg contents of ladino clover were higher in VDB than in B, but other grasses were not different between two soil types. P and K contents were not affected by lime but Ca and Mg contents were increased by lime application in most of the pasture species. P, Ca, Mg and Na contents of all pasture spesies were increased by phosphate application(P< 0.Ol)except for Ca content of tall fescue. K and Fe content were decreased, with increasing phosphate application but Zn content was not changed by phosphate application.