• 한국잠사곤충학회지
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• 제47권1호
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• pp.1-4
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• 2005

오디 생산을 위한 재배법 개발을 위하여 원줄기 길이 1m로 하여 원가지를 3~5개 정도로 유지하는 중간만들기 수형으로 유지하였다. 이 때 뽕나무 재배에 적합한 식재거리는 2${\times}$1 m(500주/10a)로 하는 것이 2${\times}$1.5 m(333주/10a)에 비하여 주당수량은 약간 적으나 식재 주수가 많아 단위면적당 수량은 높은 것으로 나타났다. 원가지 길이를 30, 50, 70 및 90 cm로 한 경우 90 cm 처리구에서 오디의 수량이 가장 많았다. 원가지 길이별 주당 가지수는 원가지 길이가 길수록 가지수가 많았으며, 10a당 가지량 및 엽량은 일정한 경향을 보이지 않았다. 식재 거리별 주당 가지수는 식재거리가 넓을수록 가지수가 많았고, 10a당 가지량 및 엽량은 일정한 경향을 보이지 않았다.

• Journal of Biosystems Engineering
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• 제35권6호
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• pp.373-379
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• 2010

This study was carried out to develop a belt pick-up type one-row soybean cutter, using physical properties and production conditions of soybeans. The prototype soybean cutter consisted of 4 parts: cutting part, conveying part, collecting part, and travelling part. The prototype soybean cutter was designed to cut soybeans planted with a row spacing of 600 mm, and at a height of 30 mm from the bed bottom using a disk saw. Through various trials with different peripheral velocities of the disk saw and forward speed of the cutter, determined ranges of the peripheral velocity of the disk saw cutting soybeans stems were greater than 18.3 m/s. Spacing between pick-up belts (clearance) was in a range of 60~90 mm so that soybeans could be picked at heights greater than 25 cm, and the size and shape of the pick-up belt were determined the conventional manual harvesting method. The optimal ratio between the forward speed of cutter and the peripheral speed of pick-up belts were from 1 to 1.2 by theoretical analysis. the pick-up belts had a $35^{\circ}$ of tilted angle and $90^{\circ}$ of twisted angle to pick up soybeans safely from the plant input to the lower end of the belts and convey soybeans to the upper end of belts nearby a container. The soybeans at the rear container were dropped down on the soybean row with an interval. The effective field capacity of the prototype soybean cutter was 0.136 ha/h, reducing the working hour by 92% when compared with the manual cutting.

• 한국작물학회지
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• 제47권5호
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• pp.356-360
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• 2002

The seedlings of yacon (Polymnia sonchifolia Poeppig ＆ Endlicher), which were cuttings, plug seedling (PS), crown bud before sprouting (CBBS), crown bud after sprouting (CBAS), and divided seedling after budding (DSAB) were planted at 70$\times$50 cm planting distance on ridge; that was interow spacingintrarow spacing, and about 28,500$\pm$71 plants/ha. CBBS didn't need work and equipment to raise seedlings. PS and DSAB grew taller to 140.5 and 143.3cm, respectively, than others at 150 days after planting. In the changes of plant height, PS and DSAB showed taller than others during growth period, cuttings, CBBS, and CBAS grew rapidly in middle growth stage. Excepting main stem and petiole length, other characters were significant for seedling. Fresh weights were different among seedlings. Even though the yield of plants grown from CBAS and CBBS were lower with 34.7 and 36.4 ton/ha, respectively, than 3.6 ton/ha of DSAB; its yield index were over 95%, hence, those of plants grown from cutting and PS were lower with 73 and 87%, respectively. The ratio of tuberous roots over 200g to total tuberous roots per plant was the highest from DSAB. Most of tuberous roots were under 200g per tuberous root from cuttings. CBBS, CBAS, and DSAB are suitable to use seedlings for high yield of yacono. Yacon plant by DSAB much produced tuberous root of over 200g.

• Journal of Ginseng Research
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• 제4권1호
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• pp.16-30
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• 1980

In order to increase the production of ginseng, a cultural experiment was carried out under different types of natural forest condition. Seedlings were transplanted with three spacing (70,90 and plants per 1.62m2) under the broad leaved, needle and mixed forest. The obtained results are as follows. 1 Growth of aerial part of ginseng plant. 1) Vegetative growth under forest condition of very poor as compared with ordinary cultivation, but there was no significant in number of leaf and teasel. 2) Stem diameter and stem length under the different forest types were a little difference. However petiole length and number of leafet showed an increasing trend in broad leaved forest as compared with other forest types. 3) The withering date of aerial part of ginseng plant in the needle forest was later than of others. 2. Fresh weight of ginseng root per plant was decreasing in the order of broad leaved forest, needle and mixed forest, needle and sized forest respectively. However the root weight was much smaller than that of ordinary cultivated one. 3. No big difference was observed in the growth of both aerial and root among the planting density 4. Nitrogen content in ginseng root under forest was lower, but calcium content In root was higher than that of ordinary one. 5. Fat and fiber content of ginseng root under forest showed higher than that of ordinary one. 6. The saponin content of ginseng root grown under forest condition was higher than that of ordinary ginseng root. According to high performance liquid chromatogram of saponin, only difference from ordinary cultivated ginseng root was that ginsenoside Re showed higher peak than ginsenoside Rg1.

• 한국자원식물학회지
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• 제32권1호
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• pp.38-44
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• 2019

새롭게 도입된 얌빈의 국내 재배기술 확립을 위하여 육묘조건, 적심, 적화, 재식밀도 등의 재배요인에 의한 생장과 수량반응을 조사한 결과는 다음과 같다. 얌빈은 P.E. 하우스내에 전열 온상을 설치하여 평균 $22^{\circ}C$로 유지하여 30일(적산온도 $650^{\circ}C$) 육묘하면 건전묘 생산이 가능하였다. 트레이 규격에 따른 출현 특성의 차이는 없으며, 셀 크기가 클수록 묘 생장량이 증가하지만 육묘효율, 이식작업의 편의성을 고려하여 128공 트레이가 적합하였다. 7월 하순에서 8월 상순에 120 cm 높이에서 적심을 하면 수량이 23% 가량 많아지며 8월 하순에서 9월 상순 사이에 적화를 하면 괴경수와 괴경중이 증가하여 수량이 32% 가량 많아진다. $50cm{\times}30cm$로 정식하였을 때 관행 $100cm{\times}30cm$보다 수량이 30% 증가하였다. 적심, 적화, 재식밀도 최적조합처리는 무처리에 비해 경제적으로 107%의 이익적인 요소가 발생하였다. 이상의 연구 결과 얌빈의 최적 재배기술 적용을 통해 국내에서 새로운 소득 작목으로서 유망할 것으로 판단된다.

• 한국작물학회지
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• 제34권2호
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• pp.127-133
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• 1989

수도 주요 품종별 주내 및 주간경쟁반응과 주내에서 주요 형질의 경간 변이 정도를 구분하고 주요 반응 태상별 재식밀도 반응을 구명하여 다수확 재배기술 개선을 위한 기초자료로 이용하고자 시험을 실시하였던 결과를 요약하면 다음과 같다. 1. 주내 및 주간경쟁지수가 다같이 낮은 품종은 팔공벼, 밀양 83호, 밀양 90호, 상풍벼였고, 주내 및 주간경쟁지수가 다같이 큰 품종은 풍산벼, 삼강벼, 원풍벼, 태백벼, 동진벼 등이었다. 2. 주내 가 경간 주요 형질의 병이는 형질에 따라 품종별 반응이 약간 달랐으나, 대체로 각 형질의 변이계수 상호간에는 정상관관계가 있었으며, 경쟁지수가 높은 품종이 주내에서 주요 형질의 경간 변이계수가 낮은 경향이었다. 3. 경쟁지수와 수량과의 관계에서 주내 경쟁지수가 증가하면 일본형 품종들과, 통일형 품종중에서 소얼성인 밀양 83호 는 수량이 증가하였으나, 풍산벼와 남영벼는 일정한 형향이 없었다. 그러나 전품종 다같이 주간 및 전체 경쟁지수가 증가하면 쌀수량이 증가하였다. 4. 경쟁지수 증가에 따른 쌀수량의 증가 정도는 경쟁지수가 낮았던 팔공벼, 밀양 83호 등에서 크게 나타났다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.207-207
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• 2017

The proso millet is vulnerable to lodging due to high plant height and shallow root. A lodging results in a hard mechanical harvesting and yield loss. One of solutions on this problem is inhibition of internode elongation. The objective of this study was to set up use time and dose of prohexadium-calcium, is growth inhibitor. The experimental variety was Ibaekchal. The experiment design was a split-plot design with three replications. The treatments were as follow: Main-plots were 25 and 35 day after sowing(DAS) as use time and sub-plots were 0%, 50%, 100%(diluted solution of 1000 times, $1000{\ell}\;ha^{-1}$), 150% as dose. The amount of nitrogen, phosphate and potassium fertilization were 90, 70, $80kg\;ha^{-1}$, respectively. The size of high ridge and plant spacing were $90{\times}30cm$ and $60{\times}15cm$, respectively. Proso millet was sown on June 9, 2016 by hands and was adjusted at 2 plant per hill. The growth survey of vegetative growth stage was conducted at 1 day before treatment and with one week interval after treatment. Data were collected: (1) grain yield: weight of grain in $kg\;ha^{-1}$, (2) 1000 grain weight: average weight of 1000 grain, (3) plant height: distance from soil to top of panicle or leaf in cm, (4) ear length: distance from top of stem to top of ear in cm, (5) stem diameter: diameter of second internode (6) degree of lodging: percentage of lodging area, etc. Analyses of variance were performed using R version 3.3.1(https://www. r- project. org). The Duncan's multiple range test(DMR) was used to separate treatment means at P < 0.05. There was a significant difference in plant height and number of stem among the use time and dose of prohexadium-calcium during vegetative growth stage. At 25 DAS, the difference with no treatment increased until 25 day after treatment and decreased since then. The difference in number of stem increased until 18 day and decreased since 25 day. At 35 DAS, the difference with no treatment in plant height and number of stem increased until 22 day after treatment and decreased since then. We assumed that the effect of prohexadium-calcium was inhibition of internode elongation and promotion of tillering, continued untel 25day after treatment. At 25 DAS, the degree of lodging deceased to 100%, 30%, 10% and 0% as dose increased. At 35 DAS, the degree of lodging decreased to 100%, 20%, 0% and 0% as dose increased. At 25 DAS, the yield was 2910, 2710, 3190, $2310kg\;ha^{-1}$ among dose. At 35 DAS, the yield was 2750, 2630, 2220, $2050kg\;ha^{-1}$. We recommend that the optimum use time and dose of prohexadium-calcium for proso millet is 1000 times diluted solution of $1000{\ell}$ per ha at 25 day after sowing.

• 한국작물학회지
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• 제5권1호
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• pp.37-43
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• 1969

IRRI 육종포장에 육성된 단간성 Indica품종에 T(N)1, $CP_231$231SLO17, 및 B569A12와 기타 몇가지 Indica품종이 교배된 $F_2$ 집단의 초장을 측정하여 $F_2$잡종들의 초장에 관한 분리를 조사하였는데 그 결과는 다음과 같이 요약된다. 1. 동남아의 장간 Indica품종들은 대만품종 T(N)1에 교배되어 3:1로 분리하는 것과 3:1로 분리되지 않는 것으로 구분된다. 2. U.S.A. 품종들은 특히 단간자료로 쓰이는 CP231-SO17과 B569A12는 T(N)1과의 조합에서 3:1로 분리하지 않는다. 3. T(N)1의 단간성 대응유전자를 가진 품종일지라도 조합 상대품종에 따라 우성 정도, 초월분리 정도가 다르다. 4. 간장에 관하여 보족적인 현상을 나타내는 경우가 있다. 즉 단간${\times}$단간에서 장간 분리개체가 많이 나왔다. B569A12${\times}$T(N)1은 그 예이다. 5. 복잡한 유전구성품종을 단순한 유전구성품종에 Backcross하여 단순한 유전분리현상을 관찰할 수 있었다. Peta/2${\times}$B569A12는 그 예이다.

• 한국토양비료학회지
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• 제44권1호
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• pp.8-14
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• 2011

The effect of flooding and soil salinity on the growth of yam (Dioscorea batatas) were studied on the experimantal site temporally established in the south-eastern part of Saemangeum Reclaimed Tidal Land (near Gwanghwal myun, Gimjae-gun, Jellabukdo, Korea). Yam seedlings planted by using aerial bulblet as alternative of sliced tubers, were grown for 20-days and transplanted in black-vinyl mulched ridges (about 20 cm in height) at 70cm interval by $20{\times}60cm$ spacing in the $4^{th}$ of May, 2010. Soil salinity was maintained at lower than 1.2 ds $m^{-1}$ during the growing period and did not result to salt injury in all plants. However, flooding injury very seriously led to plant death and plant mortality rates at $67{\pm}21$ and $82{\pm}9%$ of yam plants in the compost and no compost treatment, respectively, died by heavy flooding during the rainy summer season. The main reasons of the flooding injury included the decreased rainfall acceptable capacity (RAC) after the rising of water table and a slowdown of water infiltration rate after the formation of an impermeable soil crust in the furrow bottom with continuous and heavy downpour during the rainy summer season. The effect of compost treatment was not statistically observed because of the severe spatial difference caused by wet injury, although yam tuber yield was higher at 30 kg $10^{-1}$ in the compost treatment than in the no-compost treatment at 20 kg $10^{-1}$. However, the size of tuber ranged at 1.23 to 1.60 cm in diameter and 3.7 to 5.0 cm in length in all both treatment, which means they are still reproducible for the next cropping season. Conclusively, proper counter-flooding measure and soil salinity control critically important for successful yam production in Saemangeum Reclaimed Tidal Land.

• 한국약용작물학회지
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• 제7권2호
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• pp.89-93
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• 1999

구기자의 비닐 하우스 재배에서 재배방법에 따른 생육, 수량성 및 병해충 발생정도를 알아보기 위하여 충남 청양군 청양농공업고등학교 실습 포장의 비닐 하우스에서 1997년 2월 20일부터 98년 10월5일까지 ‘청양 재래’ 품종을 재식거리, 적심시기 및 적심횟수를 달리하여 재배한 시험 결과를 요약하면 다음과 같다. 1. 재식거리가 멀수록 분지수가 적어졌고, 경장, 경직경, 분지당 엽수, 엽장, 엽폭은 증가하였으며, 개화기 차이는 없었다. 2. 재식거리가 멀수록 분지당 화수, 착과수, 생과중, 전과중은 증가하였으나, 총 수량은 단위면적당 총 주수가 많은 재식거리 $60\;{\times}\;20cm$에서 가장 높았다. 3. 적심시기가 5월5일에서 6월5일로 늦어질수록 생육형질인 경장, 경직성, 분지수, 분지당 엽수, 엽장, 엽폭은 낮았고, 분지당 화수, 착과수, 생과중, 건과중도 모두 낮았다. 4. 적심횟수가 증가할수록 분지수는 많아졌지만, 경장, 경직경, 분지당 엽수, 엽장, 엽폭 모두 감소하였다. 5. 적심횟수가 증가할수록 분지당 개화수, 과립수, 착과율은 감소하였지만, 주당 생과중, 건과중은 증가하였다.