• 한국토양비료학회지
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• 제45권6호
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• pp.1153-1156
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• 2012

대관령 지역의 과거 38년간 (1972-2009)의 기상자료를 수집하여 최저한계온도를 추정하였다. 최저한계온도 출현 빈도 추정은 Gumbel의 극한치 확률분포이론을 도입하여 기온자료의 확률분포함수를 도출하여 이루어졌다. 그 결과 저온 출현일 빈도는 작물의 생산안정성과 밀접한 관계가 있기 때문에 조사하였으며, 저온 출현일이 앞당겨질수록 작물을 일찍 심어 안정된 생육을 유지할 수 있어 그 만큼 수량을 높일 수 있을 것으로 판단되었다. 대관령 지역에서 한계 저온 $5^{\circ}C$ 이상이 5일 이상 지속되는 날짜를 보면 4월 3일, 4월 10일, 4월 20일, 4월 28일, 5월 8일로 나타났으며, 한계저온이 나타나는 시기가 앞으로 당겨질수록 그 시기 (한계저온 $5^{\circ}C$ 출현일)가 출현할 확률이 작아지고 재현되는 기간이 길어져, 작물을 재배할 기회가 줄어들어 작물 파종 및 정식이 어렵게 된다. 따라서 재현기간을 순서대로 보면 50, 25, 10, 5, 2년 이었다. 기온 $5^{\circ}C$에 적응하는 저온성 작물 (배추, 샐러리, 토마토, 딸기 등)은 5월 8일 이후에 파종 또는 정식하면 대관령 지역에서 안정된 수량을 얻을 수 있을 것으로 판단되었다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.20-20
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• 2022

A traditional wheat breeding program needs more than 12-13 years to develop a new cultivar. In recent years, 'Speed breeding (SB)' system, which uses extremely extended photoperiod (22 h), enabled up to 4-6 generations of spring wheat per year. However, since almost 70% of wheat cultivars are winter type, and over 95% of total cultivation area is for winter wheat in Korea, optimized vernalization treatment was essential for improving the SB system. Several vernalization temperatures and durations were tested with various genotypes, and the 4 weeks of 8-10 ℃ vernalization treatment was the most effective to develop 4 generations per year, for both spring and winter type wheat cultivars. This 'Speed vernalization (SV)' system followed by SB, allowed developing a new F₆ recombinant inbred lines (RILs) within 2 years. Among the 184 RILs, which derived from a cross between Jokoyung and Joongmo2008, two outstanding lines were selected for yield trial test, and then named Milyang52 and Milyang53. Compared to the traditional wheat breeding program, over 60% of the time was saved to develop these two lines. Marker-assisted selection and backcross were also combined with the SV system. YW3215-2B-1 (Jokoyung*3/Gamet), which has similar agronomic traits with Jokyoung and the same Glu-B1 allele with Garnet, was developed within 2.5 years. Thus, the SV system combined with molecular breeding technology would help breeders to make a new cultivar with less time and high efficiency.

• 한국대기환경학회지
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• 제32권2호
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• pp.167-175
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• 2016

In this study, we estimate air pollutants emission from agricultural waste burning. We investigated activities related to agricultural waste burning such as crop burning rates, location, and time by region. The average crop burning rates per square meter farmland of fruits, pulses, barleys, cereals, vegetables, and special crops were $273.1g/m^2$, $105.7g/m^2$, $7.4g/m^2$, $121.0g/m^2$, $290.7g/m^2$, and $392.9g/m^2$, respectively. We estimated air pollutants emissions with pre-developed emission factors. The estimated air pollutant emission of agricultural biomass burning were CO 148,028 ton/year, $NO_x$ 5,220 ton/year, $SO_x$ 11 ton/year, VOC 59,767 ton/year, TSP 21,548 ton/year, $PM_{10}$ 8,909 ton/year, $PM_{2.5}$ 7,405 ton/year, and $NH_3$ 5 ton/year. When these results compared with the entire emissions of national inventory (CAPSS), CO, VOC, $PM_{10}$ account for about 17.8%, 6.2%, 6.7% of the total, respectively.

• 한국작물학회지
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• 제52권4호
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• pp.370-374
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• 2007

본 연구는 논에서 콩을 연속으로 재배 하였을 때 연차별 토양 특성 및 생산력 변화를 구명하여 식용콩 자급률을 높이기 위한 기초 자료를 제공하고자 시험한 결과를 하면 다음과 같다. 1. 논-밭 윤환에 따른 토양 물리성은 표토의 기상률은 매년 윤환구에서 17.4%였으나 콩 4년 재배구에서는 21.8%로 증가하였고, 액상률은 29.0%에서 24.5%로 낮아졌으며, 심토도 비슷한 경향을 나타내었다. 2. 토양 화학성분의 변동은 콩 1년 재배지에 비하여 유기물은 콩 1년 재배지 $21.5g\;kg^{-1}$보다 2년 재배지가 $21.8g\;kg^{-1}$로 약간 높아졌다가 3년부터는 떨어지는 경향이었으며, 치환성가리는 약간 감소하는 경향이었으나 그밖에 무기성분은 증가하는 경향을 보였다. 3. 콩 생육은 콩 $1{\sim}2$년 재배구에 비하여 콩 $3{\sim}4$년 연작구가 경장도 $5{\sim}9cm$ 짧고 분지수도 $0.5{\sim}1.0$개 적었으며, 엽색도도 $3.5{\sim}7$정도 낮았는데 이는 연작기간이 길어질수록 생육이 떨어지는 것을 알 수가 있었다. 4. 콩 수량은 논밭 윤환시 255 kg/10a에 비하여 2년 연작시 222 kg/10a로 12.9%, 3년 연작시 201 kg/10a로 21% 감수하였으며, 생육시기별 뿌리혹 건물중 및 뿌리혹 착생은 1년 재배지에 비하여 재배 년수가 증가할수록 감소하는 경향을 보였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 1983년도 춘계 학술대회지
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• pp.4-5
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• 1983

• 한국농공학회논문집
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• 제55권6호
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• pp.113-120
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• 2013

Miscanthus is one of the promising energy crops for producing bioethanol or bioenergy in many countries. A field of about 180 ha for miscanthus plantation was started for demonstration near Geum River in 2011. Since the size of the field is much larger than those of traditional cultivation for one single crop in this country, questions were raised if there are any environmental impacts from the energy crop plantation, particularly on water quality. In this study, water quality of runoff water from three different plots was analyzed for assessing the impacts of energy crop production. The results showed that there were no substantial differences among the plots; control, the first, and the second year growth fields. The concentrations of COD, T-N, and T-P were lower than those in runoff water from agricultural crop fields. The second year field showed a slight higher values of COD and T-N concentrations due to the biodegradation of residue of miscanthus which was not cultivated for observation. Commercial planation of miscanthus in a large scale would not result in a water quality problem when avoiding application of fertilizer as practiced in agricultural crop fields.

• 한국약용작물학회지
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• 제21권4호
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• pp.296-300
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• 2013

This study was carried out to have the basic and applied information to develop the cultivation methods and models and to increase the productivity of high-quality ginseng. Plant height was dramatically increased from one year old to four years old, and then it was grown up very slowly. Stem length was shown similar tendency as the plant height did. Its range were from 9.4 cm in one year old to about 42.4 cm in four year-old ginseng. The leaf area was clearly increased until four years old, $10.1cm^2$ in one year old to $204.9cm^2$ in four years old, while it was slightly increased after four years old. Root length was continuously increased from one year old until four years old, and then it was grown up very slowly. Tap root length which was measured was appeared about 8 cm from three years old to six years old, showing not much different among the year-olds. The root diameter was continuously increased from one year old to six year-old ginseng, about 2.9 mm and about 19 mm, respectively. The moisture content was higher on the shoot than that on the root. It was slightly decreased as they were getting old. In shoot part, the rate of leaves and stems based on dry weight was about 1 : 1. In the root, the dry weight of tap root was heavier than that of lateral root. The dry weight of shoot was decreased after four years old, while it of the root was continuously increased until six years old, resulting the production of ginseng root. Based on the results of this study, growth characteristics of shoot and root of ginseng were dramatically increased from one year old to four years old and then their growths were appeared different between shoot and root, showing not much growing in shoot and keep growing in root.

• Journal of Ginseng Research
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• 제31권3호
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• pp.142-146
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• 2007

본 시험은 경흔적수 측정법으로 수삼의 연근을 판별하기 위하여, 4, 5, 6년근의 경흔적수 발생실태를 조사하였다. 경흔적수를 이용한 연근판별법은 3년근 경흔적부터 식별가능하여 경흔적수에 2를 더하면 년근판별이 가능하였다. 년근별 경흔적수가 4년생에서 2개 발생율이 89.5%, 5년생에서 3개 발생율이 79.7% 6년생에서 4개 발생율이 46.3%로, 4, 5년근의 판별은 가능하였으나, 6년근 판별은 정확도가 낮아 보조자료로 활용함이 타당하였다. 경흔적을 이용한 연근 판별의 제한요인으로 뇌두파손과 다경발생임을 확인하였고, 뇌두파손율과 다경발생율은 년근이 증가함에 따라 증가되었다.

• 한국약용작물학회지
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• 제23권1호
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• pp.27-36
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• 2015

Shading and soil environment are the main factors of growth and yield in ginseng (Panax ginseng C. A. Meyer). Ginseng yield is directly related to survival rate because of increased missing plant for their growing period. Under field conditions, diseases and pests significantly affect plant survival rate. We evaluated the seedling establishment, growth and ginsenoside of the ginseng plants, under controlled management conditions in a plastic greenhouse, when their treated with different types of organic matter. Ginseng seeds were sown at a rate of three seeds per hole, and the seeding space measured $10cm{\times}15cm$. Compared to the control, treatment of cattle manure vermicompost (CMV) was shown to increase seedling establishment and decrease ginsenoside content. Root weights of plants treated with CMV were higher than those of plants treated with other types of organic matter. In addition, seedling establishment of 2-year-old ginseng plants was decreased when it was compared to that of 1-year-old ginseng plants. Our results indicated that organic matter type and rate were associated with seedling establishment, growth characteristic and ginsenoside content in greenhouse of ginseng direct-sowing culture.

• 한국약용작물학회지
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• 제2권3호
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• pp.193-197
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• 1994

토성(土性)에 따른 시호(柴胡)의 생육특성(生育特性)과 saikosaponin 함량(含量) 변이(變異)를 조사(調査)하여 시호(柴胡) 재배(栽培)에 있어서 토성(土性)이 미치는 영향(影響)을 알아보고자 본(本) 실험(實驗)을 수행(遂行)하여 다음과 같은 결과(結果)를 얻었다. 1. 토성(土性)에 따른 시호(柴胡)의 생육량(生育量)은 사양토(砂壤土)와 양토(壤土)에서 양호(良好)하였고 근수량(根數量)은 사양토(砂壤土)에서 가장 좋았다. 2. 시호근(柴胡根)의 총(總) saikosaponin 과 엑스함량(合量)은 식양토(埴壤土)에서 가장 높았다. 3. 1년생(年生)과 2년생(年生) 모두 토성(土性)에 따른 생욱특성(生育特性)과 성분함양(成分含量)은 동일(同一)한 경향(傾向)을 보였으며, 2년생(年生)의 생육(生育) 및 근수량(根收量)이 1년생(年生) 보다 높았으나 엑스 및 saikosaponin 함량(含量)은 낮았다. 4. 각(各) 생육요소(生育要素)와 엑스 및 saikosaponin 함량(含量)과의 교관분석(橋關分析) 결과(結果) 고도(高度)로 유의(有意)한 부(負)의 상관(相關)을 나타냈다.