• 한국식품과학회지
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• 제32권4호
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• pp.772-787
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• 2000

In this study, evaluation on the loaches from the various sources was carried out in respect of their taste compounds. The samples were classified by local, season and growing condition and evaluated in terms of composition, the refuse, contents of nucleotides and their related compounds, total and free amino acid, organic acid and fatty acid. Evaluation on the compositions revealed the fact that, in terms of the local, the imported loach contain a low level of fat and high level of ash, in comparison with Korean loach; in terms of growing condition, cultured loach contains a high level of fat and low level of moisture, in comparison with wild loach; and in terms of the season, the summer loach contains less moisture than the fall loath; but as for the contents of other component, the summer loach was superior. As for the refuse, the imported loach had a greater refuse than the Korean loach. In the growing condition, the wild loach had lower value than the cultured loach. There was no substantial difference in each season. Also nucleotide and these related compounds were detected in all of the samples, while ATP was not found. The content levels of such detected compound did not show a substantial difference in each condition. However, generally, the imported loach was poor in such compound and all of the samples were high in IMP. The samples were high in total amino acids. The local and growing conditions showed no substantial difference, while in the season, the summer loach had a higher content of total and essential amino acid than the fall loach. As for the contents of free amino acids, similar distribution of the composition was shown in each sample, even though there was little difference in their constituents. Also, total content of free amino acid varied with the conditions of the samples. As for total content of organic acid and the distribution of the composition, there was a little difference between each condition. In the season and growing condition, the summer loach was high in organic acid. As for the distribution of the fatty acid compositions, there was no substantial difference between each condition and each sample. In the case of the wild loach, the summer loach was high in ${\omega}-3$ polyunsaturated fatty acid and the fall loach was high in essential fatty acid. Similarly, in the case of the imported loach, the summer loach was high in ${\omega}-3$ polyunsaturated fatty acid and the fall loach was high in essential fatty acid.

• The Korean Journal of Ecology
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• 제18권3호
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• pp.385-395
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• 1995

Species effects on soil nitrogen mineralization and nitrification in the top 15 cm of soil were evaluated using the buried-bag incubation method in three coniferous plantations in the Kwangneung Experimental Forest, Kyonggi Province. The plantations were established on a similar soil in 1927, and included Larix decidua, Pinus strobus, and Thuja occidentalis. Ten soil samples within each plantation were taken during an entire growing season (May 2~Oct. 30, 1994). Mean daily nitrogen mineralization rates during 45-day in situ soil incubations were significantly different among species and incubation dates. Growing season nitrogen mineralization also differed significantly among species and ranged from 47.7 mg N/kg soil for Larix decidua to 21.5 ma N/kg soil for Thuja occidentalis. Growing season nitrification differed significantly among species and comprised from 93% to 100% of the total growing season nitrogen mineralized. We speculated that organic matter contents and quality might control nitrogen mineralization and nitrification in these soils.

• 한국작물학회지
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• 제38권5호
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• pp.477-482
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• 1993

담배재배기간중 잎담배수량에 영향을 주는 양적형질의 변화량과 주당엽건물이나 엽면적과의 관계, 최종수량과의 상관등을 구명하여 담배 생산성 연구의 기초자료로 이용코자 시험한 결과를 요약하면 다음과 같다. 1. 주당엽건물량에 미치는 엽위별 엽면적의 영향력을 최대엽과 인접 4매엽면적의 합이 가장 높았으며 다음은 주당엽면적, 14매째의 엽면적순으로 나타났다. 2. 주당엽건물량에 미치는 엽이별엽건물량의 영향력은 14매째의 엽건물량이 가장 높았으며 다음은 최대엽과 인접 4매 엽면적의 합 순으로 나타났다. 3. 황색종잎담배 최종수량은 이식후 70일째의 건엽물량과 가장 깊은 관계가 있고 이식후일수 경과가 적은 시기일수록 상관도가 낮았다. 4. 버어리종 담배의 최종수량은 이식후 50일째 까지의 엽건물량과는 유의성 관계가 없었고 이후 65일일째 까지는 5% 수준에서 70일째에서는 1% 수준에서, 유의성관계가 인정되었다.

• Journal of Plant Biology
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• 제11권4호
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• pp.30-36
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• 1968

The vascular flora of grasslands in Mt. Kumhak, Moonheri, Sungilkyo and Kosukjong area located at Chulwon were composed of 54, 57, 45, and 39 species, the most impotant of which were Arundinella hirta and Miscanthus purpurascens. These two species contributed greatly to the standing crop of live material was in excess of 142g/$m^2$ throughout the growing season. The peak standing crop of 332.4g/$m^2$ was reached in July under flooded conditions largely as a result of the growth of Miscanthus Purpurascens and Arundinella hirta. The net production of organic matter occurred largely throughout the growing season. The net productivity of the vascular component of community was in excess of 27.3g/$m^2$ for one growing season.

• Journal of Ginseng Research
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• 제12권1호
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• pp.53-62
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• 1988

A field experiment was conducted in the arid interior of British Columbia, Canada to assess the seasonal soil temperature and moisture regimes in an American ginseng garden. As a consequence of the man-modified microclimate (elevated shade canopy and surface covering of mulch), the growing environment of the crop was fundamentally altered when compared to adjacent agricultural growing environments. In the ginseng garden, soil temperatures were found to remain low throughout the growing season whereas soil moisture remained high when compared with the outside garden environment. These results indicate that even in the hot, arid environment of the interior of British Columbia, the growing of ginseng is undertaken in sub-optimal conditions for the major part of the growing season. This poses challenges for the producers of the crop to modify the architecture of the gardens to enhance the soil regime without creating a deleterious aerial environment.

• 식물병연구
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• 제18권4호
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• pp.349-353
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• 2012

자두 검은점무늬병은 Xanthomonas arboricola pv. pruni에 의한 세균성 병해로 과실표면에 검은 반점형태의 병징이 발생하여 과실 상품성을 저하시켜 자두 재배농가에 큰 경제적 손실을 초래하는데 이러한 자두 검은점무늬병에 대한 효과적인 약제 방제체계를 개발하기 위하여 몇 종의 화학약제와 살포체계를 구성하여 휴면기중에는 동제 약제를 그리고 과실생육기중에는 항생제계열 약제를 살포하였는데 과실생육기중에서의 항생제계열 약제살포는 휴면기중의 동제 약제살포보다 높은 방제효과를 나타내었다. 자두의 개화만개 10일 후부터 10일 간격으로 3회의 항생제계열 약제살포는 93%의 높은 방제가를 얻을 수 있었는데 비해서 휴면기중의 동제 약제살포는 26-42%의 낮은 방제가를 얻는데 그쳤다. 또한 항생제계열 약제의 처음 살포시기가 개화만개 후 20일이나 30일 보다는 개화만개 후 10일에서 더 높은 방제효과를 얻을 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제26권3호
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• pp.401-407
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• 2013

Two experiments were conducted to determine an optimum Lys:calorie ratio (g of total dietary Lys/Mcal of DE) for growing barrows and gilts in cool and hot seasons in a commercial environment. In Exp. 1, 96 barrows and 96 gilts were randomly allocated in 1 of 4 dietary treatments (2.7, 3.0, 3.3, 3.6 g of Lys/Mcal of DE). Each treatment had 12 replicate pens with 4 pigs per pen. The experiment lasted for 34 d in the cool season (March 12th to April 15th). Diets were based on corn-wheat-soybean meal. Lys:calorie ratio were attained by adjusting the amount of corn and soybean and supplementation of crystalline Lys. Total Lys intake and available Lys intake were increased (p<.05) as dietary Lys:calorie ratio increased. The BUN concentration on d 34 for barrows, and BUN change for barrows and gilts linearly increased (p<0.05) in response to increasing dietary Lys:calorie ratio. For gilts, back fat was decreased and then increased (Quadratically, p<0.05) as increasing dietary lys:calorie ratio. Exp. 2 had a similar design as Exp. 1 with the exception that Exp. 2 was conducted in hot season (June 30th to September 11th) for 42 d. Diet of Exp. 2 was the same as Exp. 1. Total Lys intake and available Lys intake increased (p<0.05) as dietary Lys:calorie increased. On d 42, the BUN concentration increased (p<0.05) in response to the increasing dietary Lys:calorie ratio. In conclusion, dietary Lys:calorie ratio of 2.7 g of Lys/Mcal of DE could satisfy the requirement of 25 to 50 kg growing pigs. Increasing dietary Lys:calorie ratio could increase BUN concentration in growing pigs.

• 기술사
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• 제2권6_7호
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• pp.12-23
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• 1969

The purpose of this study is to find out the reasonable amount of evapo-transpiration required for the paddy rice plant during the whole growing season. So, on the basis of the 3year experimental data concerning the evapo-transpiration from 1966 to 1968, the author obtained the following results. 1) The leaf area index in the densely planted plot is generally higher than that in the conventionally planted one during the first half of growing season. So, the coefficient of transpiration in the former plot is some what higher than in the latter, and the coefficient of water surface evaporation under the plant cover has the inverse relation between both plots. 2) It is unreasonable that coefficient of evapo-transpiration is applied to the calculation of the evapo-transpiration requirments of each growing stage, because a certain degree of variation in meteorological factors and in the thickness of the plant growth is involved in it. 3) It is most reasonable that the rate of transpiration and of the water surface evaporation is applied to the calculation of the transpirated amount and evaporated one in each growing stage because it shows almost constant value in spite of any meteorological conditions in so far as the variety of rice, planted density and control of applying fertilizer are same and the disease and blight are negligible. 4) The ratio of the amount of transpiration to the weight of the whole air dried yields has the tendency of decreasing as that of the yields increase, having almost constant value despite the amount of pan evaporation; and the value is about 210 when the weight of root parts is included to that of the yields. 5) Although the required amount of transpiration during the whole growing season can be calculated with the above ratio, fig. 7 showing the relation between the amount of transpiration and the weight of the yields is more reasonable and will be convinient to find it. And the requirements of water surface evaporation during the same season can also be directly found with the weight of air dried straw refering to fig.8.

• Journal of Radiation Protection and Research
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• 제27권3호
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• pp.127-146
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• 2002

원자력 사고후 시간경과에 따른 작물체내 핵종 농도를 보다 현실적으로 예측할 수 있는 방법을 수립하고 단위 건침적에 대하여 백미와 배추내 $^{90}Sr$ 및 $^{137}Cs$의 50 년간 농도를 예측하였다. 비생육기 사고의 경우 농도는 두 핵종 모두 시간경과에 따라 서서히 감소하였고 50 년 내내 $^{90}Sr$이 $^{137}Cs$보다 높았다. 생육기 사고의 경우 처음 1년간 농도는 비생육기 사고에 비해 대체로 $^{90}Sr$은 최고 30 배, $^{137}Cs$은 최고 1,000 배 정도까지 높았다. 50 년간의 누적농도는 백미에서는 비생육기 사고의 경우 $^{90}Sr$이, 생육기 사고의 경우 $^{137}Cs$이 더 높았으나 배추에서는 어느 경우에나 $^{90}Sr$이 더 높았다. 생육기 사고시 50 년간의 누적농도에 대한 지배적 경로는 대체로 $^{90}Sr$의 경우 뿌리흡수, $^{137}Cs$의 경우 작물체 직접오염이었다. 재부유의 영향은 무시할 수 있을 정도였다. 예측결과에 입각하여 사고 조건별로 대책의 방향을 제시하였다.

• 한국농공학회지
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• 제41권4호
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• pp.37-46
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• 1999

Field experimnet of constructed wetland for rural wastewater treatment was performed from July 1998 to April 1999 including winter to examine the seasonal effect on the wetland performance. The system worked without freezing even under $-10^{\circ}C$ of air temperature as long as watewater was flowing. BOD removal rates varied in similar pattern as the air temperature, and winter performance was relatively lower than that in the growing season. However, removing performance during winter was still significant, and BOD removal rates were almost the the same as in the growing season. SS removal rate was relativelyless affected by temmperature, but lower decay rate during the winter can result in accumulation of the SS in the system, which releases constituents in the next spring and can affect whole system performance. The winter removal rates of nutrients like T-N and T-P were decreased about half compared to the growing season and low temperature. To maintain stabilized wetland performanced including winter time, supplying minimum heating for plants could be an alternative in field application. Experimental data was compared with NADB(North Americal Wetlands for Water Quality treatment database), and general performance of the system was within the reasonable range. The pollutant loading and effluent concentration of the experimented system were in high margin. Base on the experiment and databases, the required effluent water quality could be achieved if loading rate adjusted as ilulstrated in the database.