• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.111-111
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• 2022

According to data from the Ministry of Environment, food waste accounted for 27% of the nation5 s household waste in 2020, and 4.67 million tons of food waste is being discharged per year. According to the Food Waste Direct Landfill Prohibition Act, food waste must be incinerated, composted, fodder, and decomposed before landfilling. The cost of incineration and landfilling of food waste is considerable. Therefore, through the process of turning food waste into fertilizer, we are going to investigate the limit of crop application and the change in the growth of crops during continuous use of food waste fertilizer. This study investigated the growth of lettuce such as shoot length, root length, leaf number, fresh weight, and dry weight after treating lettuce with food waste dry powder mixed fertilizer. The experiment was carried out continuously in 2021 (1st year) and 2022 (2nd year), and the treatment groups were set to No Treatment (NT), Chemical Fertilizer (CF), Mixed Fertilizer (MF×1), and Mixed Fertilizer×2 (MF×2), was repeated 3 times. As a result of the 1st year growth survey, there was no significant difference between NT and CF in the case of shoot length, but MF×1 and MF×2 were significantly decreased compared to NT. Root length was not significantly different in all treatment groups. As for the leaf number, there was no significant difference between NT and MF×1, but CF and MF×2 were significantly decreased compared to NT. In fresh weight, MF×1 and MF×2 were significantly decreased compared to NT, and in the case of dry weight, there was no significant difference between NT, MF×1, and MF×2. As a result of the 2nd year growth survey, there was a significant difference in CF and MF×2 in leaf number, but there was no significant difference in all treatment groups with respect to shoot length, root length, fresh weight, and dry weight. Through continuous additional research, it is necessary to confirm the change in soil composition and the growth of crops due to food waste fertilizer treatment.

• Plant Resources
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• 제8권3호
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• pp.225-229
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• 2005

This study was conducted to investigate the effect of activated carbon on leave production of Allium tuberosum. Growth characteristics including plant height and leaf length were the highest when activated carbon was added with 5%, suggesting that optimum amount of activated carbon was ranged from 5 to 10%. Weight of fresh green vegetable in Allium tuberosum was low in control. And fresh weight of Allium tuberosum was higher in 5% treatment of activated carbon. However, when the plants were grown in activated carbon of $5{\sim}10%$, fresh yield of green vegetable of Allium tuberosum can be increased by using Activated Carbon. Activated carbon can be utilized as a soil conditioner in agricultural crop areas.

• 한국어병학회지
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• 제15권3호
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• pp.105-110
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• 2002

한국산 어류에 감염된 포자충의 종류와 병해를 조사 할 목적으로 2001년 9월부터 2002년 8월까지 양식중인 정읍산 메기와 만경강 하구의 기수 구역에 서식하는 자연산 문절망둑을 조사하였다. 이 들 어류에서 지금까지 한국 미기록종인 포자충의 감염이 확인되었다. 즉 메기의 장 상피조직에서 Myxobolus miyairii Kudo, 1919가, 문절망둑의 피하 근육조직에서 Henneguya tridentigeri Ozaki & Ishizaki, 1941가 검출되었다. 메기에 기생 된 M. miyairii는 장 상피조직에 42-77 (56) $\mu{m}$ × 59-93(73) $\mu{m}$크기의 백색 영양체가 무수히 관찰되었고, 포자의 길이는 11.0-12.0(11.3) $\mu{m}$이었다. 어체 기생율은 86.7-90%이었으나, 감염어는 별다른 병변을 발견할 수 없었다.

• 아시안잔디학회지
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• 제20권2호
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• pp.167-174
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• 2006

키토산 처리에 의한 크리핑 벤트그래스의 생장에 미치는 영향에 대하여 분석하였다. 엽장은 무처리 평균은 25.1cm로 확인되었고, 키토산 500배 처리 시 평균 31.6cm로 가장 높은 생육증가를 나타내었다. 엽수는 무처리 시 평균은 27.9매로 나타났고, 키토산 300배 처리 시 45.5 매로 증가하였다. 뿌리길이는 무처리에서 21.1cm인 것으로 나타났으나, 키토산 600배 처리 시 27.9cm로 뿌리 길이의 생육이 증가하는 것으로 나타났다. 엽록소 함량은 무처리 시에서 $11.9mg/100cm^2$로 나타났고, 키토산 300배 처리에서 $18.4mg/100cm^2$로 최대 증가를 나타내었다. 뿌리길이의 생장, 엽록소 함량, 지상부 생체중과 건물중, 지하부 생체중과 건물중은 키토산 500배 처리 농도에서 가장 높은 생장 특성을 나타냈다.

• Asian-Australasian Journal of Animal Sciences
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• 제13권11호
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• pp.1542-1547
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• 2000

To standardize proper formulation of urea and molasses, the former to increase crude protein content of tropical grass and the latter for improving its silage quality, we examined the fermentation quality of silage of fresh and wilted napiergrass (Pennisetum purpureum Schumach) with different levels of urea and molasses with or without lactic acid bacteria (LAB). Silage was made of napiergrass with conditions of fresh young (Exp. 1),young wilted for half day (Exp. 2) and fresh mature (Exp. 3). Chopped plant materials of about 1cm length were ensiled into a laboratory silo and incubated for one month at $25^{\circ}C$. The treatments were the combination of 0, 0.2 and 0.6% of urea and 0, 2 and 5% of molasses (fresh material basis) with or without LAB inoculation. After opening the silo, pH, organic acids, volatile basic nitrogen (VBN) and total nitrogen (TN) were determined. Addition of molasses significantly (p<0.01) lowered pH values in three experiments. Though molasses addition increased lactic acid production even at a higher level of urea, pH values at 0 and 2% molasses were significantly increased by urea in fresh and wilted young silages, but in fresh mature silage it occurred only when molasses was not added. VBN/TN at 0.6% urea were decreased significantly by the highest molasses in three experiments. Significant increases in TN by the increasing of urea addition were observed at all levels of molasses in wilted young and fresh mature silages. In conclusion, a combination of 5% molasses and 0.6% urea could improve the nutritive and fermentation qualities of napiergrass silage under young, wilting and mature conditions.

• 수산해양기술연구
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• 제34권3호
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• pp.346-351
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• 1998

The purpose of this study is analyzing the performance of sea water cooling system under various refrigerant pipe length. In sea water cooling system, the increase of refrigerant pipe length cause increases of pressure drops. These pressure drops cause fresh gas in liquid pipe and increase specific volume in gas pipe outlet, so sea water cooling system capacity is decreased by decrease of refrigerant mass flow rate. Sea water cooling system capacity in refrigerant pipe length 70m is decreased more than 30% when compared with pipe length 10m and the decrease of the coefficient of performance is nearly 20%.

• Journal of Ginseng Research
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• 제18권2호
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• pp.134-136
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• 1994

The effects of soil phosphorus level on seed emergence, seedling mortality, plant and root development of American ginseng (Panax quinquefolium L.) were evaluated in a newly planted commercial ginseng garden. Phosphorus levels were increased from 58 ppm to 100, 150 and 200 ppm with triplephosphate (0-45-0). Higher phosphate levels increased, seed emergence and reduced seedling mortality. Root length, diameter, fresh root weight and total leaflet length were not affected by phosphate levels.

• 한국발생생물학회지:발생과생식
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• 제15권3호
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• pp.231-237
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• 2011

The objective of this study was to elucidate the dynamics of microtubules in post-ovulatory aging in vivo and in vitro of mouse oocytes. The fresh ovulated oocytes were obtained from oviducts of superovulated female ICR mice at 16 hours after hCG injection. The post-ovulatory aged oocytes were collected at 24 and 48 hours after hCG injection from in vivo and in vitro, respectively. Immunocytochemistry was performed on ${\beta}$-tubulin and acetylated ${\alpha}$-tubulin. The microtubules were localized in the spindle assembly, which was barrel-shaped or slightly pointed at its poles and located peripherally in the fresh ovulated oocytes. The frequency of misaligned metaphase chromosomes were significantly increased in post-ovulatory aged oocytes after 48 hours of hCG injection. The spindle length and width of post-ovulatory aged oocytes were significantly different from those of fresh ovulated oocytes, respectively. The staining intensity of acetylated ${\alpha}$-tubulin showed stronger in post-ovulatory aged oocytes than that in the fresh ovulated oocytes. In the aged oocytes, the spindles had moved towards the center of the oocytes from their original peripheral position and elongated, compared with the fresh ovulated oocytes. Microtubule organizing centers were formed and observed in the cytoplasm of the aged oocytes. On the contrary, it was not observed in the fresh ovulated oocytes. The alteration of spindle formation and chromosomes alignment substantiates the poor development and the increase of disorders from the post-ovulatory aged oocytes. It might be important to fertilize on time in ovulated oocytes for the developmental competence of embryos with normal karyotypes.

• 한국잡초학회지
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• 제8권1호
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• pp.64-70
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• 1988

일본형(日本型)(섬진(蟾津)벼) 및 통일형(統一型)(삼강(三剛)벼) 수도품종(水稻品種)을 질소(窒素) 시비량(施肥量) (10, 20, 30/10a), 과 분시비율(分施比率) (기비(基肥)와 이앙후(移秧後) 15일(日) 추비(追肥) : 수비(穗肥)의 비율(比率)이 100 : 0.80 : 20, 60 : 40)이 다른 조건(條件)에서 재배(栽培)하였을 때 출수전(出穗前) 15 일(日)에 처리(處理)한 paclobutrazol(0.6% G 3kg/10a)이 출수후(出穗後) 도복(倒伏) 관련형질(關聯形質)과 수량(收量)에 미치는 영향(影響)을 요약(要約)하면 다음과 같다. 1. 간장(稈長)은 두 품종(品種) 모두 질소(窒素) 시비량(施肥量)이 많을수록 증가(增加)하였 고 paclobutrazol 처리(處理)는 간장(稈長)을 감소(減少)시켰으며, 질소(窒素) 분시비율(分施比率)은 영향(影響)을 미치지 아니하였다. 2. 도복(倒伏)은 어느 처리(處理)에서나 발생(發生)하지 않았지만 도복지수(倒伏指數)는 섬진(蟾津)벼가 삼강(三剛)벼 보다 높았다. 두 품종(品種) 모두 출수후(出穗後) 23 일(日)까지는 생체중(生體重)의 증가(增加)와 좌절중(挫折重)의 감소(減少)로 도복지수(倒伏指數)가 증가(增加)하였지만 그 이후에는 생체중(生體重)과 좌절중(挫折重)이 모두 감소(減少)하여 도복지수(倒伏指數)는 더 변(變)하지 않았다. 3. 등숙기한중(登熟期閒中) 섬진(蟾津)벼는 간장(稈長), 삼강(三剛)벼는 생체중(生體重)과 간장(稈長)이 도복지수(倒伏指數)와 정(正)의 상관(相關)이 있었으며, 두 품종(品種) 모두 좌절중(挫折重)은 도복지수(倒伏指數)와 상관(相關)이 없었다. 도복지수(倒伏指數)에 영향(影響)을 미치는 직접효과(直接效果)는 섬진(蟾津)벼에서는 간장(稈長)이 생체중(生體重)이나 좌절중(挫折重) 보다 훨씬 컸으며, 삼강(三剛)벼에서는 생체중(生體重)과 간장(稈長)은 정(正)의 효과(效果)로, 좌절중(挫折重)은 부(負)의 효과(效果)를 보였으며, 이들 효과(效果)의 크기는 비슷하였다. 4. 현미수량(玄米收量)은 섬진(蟾津)벼에서는 질소(窒素) 시비량간(施肥量間)에 차이(差異)가 없었으나 기비(基肥), 분벽비(分蘗肥), 분시(分施)한 것이 수량(收量)이 높았다. 그러 나, 삼강(三剛)벼는 질소(窒素) 분시효과(分施效果)는 없었으나 시비량(施肥量)이 증가(增加)할수록 수량(收量)이 높았다. Paclobutrazol 처리(處理)는 섬진(蟾津)벼에서는 수량(收量)에 영향(影響)을 미치지 아니하였으나 삼강(三剛)벼는 수당영화수(穗當潁花數)의 감소(減少)로 수량(收量)이 5.2% 감소(減少)하였다.

• 한국작물학회지
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• 제50권2호
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• pp.97-104
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• 2005

Mass selection (MS) is an efficient selection method to directly improve highly heritable traits. In the present study, two cycles of MS for ear length were conducted on two sweet corn populations, BC2-l0 and $BC1-10{\times}Syn-II$ after introgression of exotic germplasm. The improved populations generated from these selections were evaluated in comparison with the base populations at two locations, to determine the genetic gains and performance of the improved populations. The two base populations showed varied average realized responses to MS. In BC2-l0 derived population, the realized responses were $9.1\%$ in BC2-l0 C1 and $1.2\%$ in BC2-l0 C2, whereas in$BC1-10{\times}Syn-II$ derived population, the realized responses were$ 5.6\%$ in $BC1-10{\times}Syn-II$ C1 and $2.9\%$ in $BC1-10{\times}Syn-II$ C2. All the improved populations showed longer ears than their respective base populations and the check varieties. Ear length, which was used as the selection criterion in this study, showed high broad-sense heritability in the BC2-l0 and $BC1-10{\times}Syn-II$ derived populations, while fresh ear yield revealed low heritability, indicating that selection for ear length in these populations would be more effective than direct selection for yield. Results of this study indicate that MS conducted on BC2­10 and $BC1-10{\times}Syn-II$ had significantly increased ear length and fresh ear yield in both populations. The improved populations obtained would serve as better germplasm sources and further selection in these populations could offer better responses.