• KOREAN JOURNAL OF CROP SCIENCE
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• v.31 no.4
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• pp.493-498
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• 1986

In order to evaluate the effect of various cultural methods developed during last 30 years on grain yield of wheat and barley and structure of plant stand for uptake of nutrient and water, solar energy use and com-petitive capacity with weed, 10 kinds of cultural practices were compared in the clayey upland soil. Row fertilization is more effective for uptake of N,P and K than rotary fertilization. Weed occurrence was deeply related with width of non-seeded area in the row and affected yield decrease. Winter injury was more serious in the cultural practices with thick plant community than in those with isolated individual plant. Root distribution was more remarkable in drill seeding or broadcasting than row seeding and had positively correlated with water consumption of barley.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.21 no.1
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• pp.136-179
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• 1976

Effects of seeding pattern and rate on the yield and some agronomic characters of barley under different cultural conditions were observed at Suweon, Daejeon and Jinju during the barley growing season from 1972 to 1974. Plant height and culm length were increased by dense seeding, shading, heavy fertilization, moving location down to the lower latitude. The tiller number per plant, dry matter weight, leaf number on main stem, percentage of valid tillers, RGR, NAR, and $R_{A}$ were increased by heavy fertilization, sparse seeding, reduced furrow width and drilling likewise the length, width and angle of leaf. The newer cultivar had higher RGR and NAR. The higher yielding cultivars had higher potential for carbohydrate assimilating ability. Straw weight and grain yield were increased by dense seeding, reduced furrow width, drilling, heavier fertilization and moving the location to the south, and then decreased by shading and late seeding. High yield increase by drilling was found in late seeding. The optimum seeding rate for the yield increase were 15l/10a for furrow and 25l/10a for drilling. The spike number type cultivars were favourable for the sparse seeding and the spike weight type cultivars seemed to be suitable to the dense seeding, The repeatability of days to heading due to location and fertilizer level was higher than that of seeding time and seeding method. Repeatability of culm length was extremly high in seeding method and comparatively high in fertilizer level while low in location. The repeatability of yield due to location and seeding methods was comparatively high, but the tendency was different along with different cultivars. Also the repeatability of yield due to the fertilizer level was generally high except cultivar Haganemngi.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.40 no.5
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• pp.548-555
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• 1995

This study was aimed to provide understanding on the eco-physiological response of barley tillers as affected by sowing method. Yield and yield contribution rates of tillers were investigated with the data of field experiments in the Honam Crops Experiment Station of Iri, Korea from October 1986 to July 1987. Narrow-seeding (each row placement 40cm$\times$seeding width of each row 18cm), drill-seeding (20cm$\times$5cm) and broadcasting on wide ridge (each ridge placement 120cm$\times$ridge width 90cm) were applied to examine the effects of various sowing methods. Primary tillers such as mainstem, 1 and 2 produced ears in all treatments, but the ear from a secondary tiller of 11 was observed only in broadcasting on wide ridge. Drill-seeding was the highest in number of spikelet, grain and plump grain per ear, while narrow-seeding being the lowest. The plump grain yield per square meter was 679.8g in narrow-seeding, while drill-seeding and broadcasting produced more than narrow seeding by 28.7% and 16.8% respectively. The actual yields per l0a for sowing methods showed a similar pattern to plump grain yield per square meter in which the yield was 567.6kg by narrow-seeding and the increments of drill-seeding and broadcasting were 30.6% and 15.4%, respectively.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1993.10a
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• pp.9-10
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• 1993

최근의 배추 소비경향은 월동을 위한 다량의 김장을 담그는 것보다는 주년을 통해서 신선한 고품질의 배추의 요구가 매년 증가하고 있다. 따라서 종래 배추재배양식에서 벗어나 시설을 이용해 동기부터 춘기에 걸친 배추 재배면적이 매년 늘어나고 있는 것이 현실이다. 그러나 특히 배추의 시설재배에서는 동기부터 춘기에 걸쳐 칼슘결여에 기인되는 생리장애의 일종인 Tipburn이 발생해서 상품성이 떨어져 재배농가의 대단한 경제손실이 되고있다. (중략)

• Korean Journal of Weed Science
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• v.14 no.1
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• pp.62-70
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• 1994

This study was conducted to find out if there are some differences in germination, growth and morphological characteristics between rice(Oryza saliva) and barnyardgrass(Echinochloa crus-galli) under various cropping patterns and to abtain the fundamental information on weed control method in direct seeded rice. Rice was broadcast on soil-surface(Broadcast rice), drill seeded in soil(Drilled rice) and barnyardgrass was drill seeded in soil(Barnyardgrass) under dry(Dry condition) and water direct seeded condition(Water condition). Also rice was transplanted with 8-day seedlings(8 -day-old seedling) and 25-day seedlings(25-*day-old seedling) under transplanting condition(Transplanting condition) At 1, 2, 3, 5, 7, 10, 15 and 20 days after seeding or transplanting(DAS/T), plants were harvested to examine their germination, growth and morphology. The major results were as follows ; Until 5 DAS/T growth of rice and barnyardgrass were well established under dry condition but under water condition growth of shoots was mainly elongated. At 20 DAS/T barnyardgrass had greater plant height and shoot fresh weight than rice under direct seeded condition, while plant height and shoot fresh weight of rice was greater than those of barnyardgrass under transplanting condition. Root length of barnyardgrass was greater under the dry, drilled, direct seeded conditions than that of rice under the water, broadcast, transplanting condition, respectively. And root fresh weight of rice under direct seeded condition was similar to that of barnyardgrass but that of rice under transplanting condition was significantly greater than that of barnyardgrass. Barnyardgrass only formed mesocotyls and its length increased with increased depth of seeding. Leaf stage and leaf area of barnyardgrass was greater under the dry, drilled than those of rice under water, broadcast conditions, respectively, while those of rice was greater than those of barnyardgrass under transplanting condition. Chlorophyll contents were higher in barnyardgrass, dry direct seeded rice, transplanted rice, water direct seeded rice in descending order.

• Korean Aquaculture
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• v.14 no.1
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• pp.88-95
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• 2002

많은 척추동물의 성비는 1:1이며 암수는 각 세대에 거의 같은 수가 태어난다. 생식 행동도, 암컷만이 집단을 형성하는 대형 포유류 등을 제외하면, 암수 1:1로부터 차세대가 재생산 된다. 야생 집단에서는 같은 수의 암수를 전제로 대부분의 생태가 형성되어 있다고 생각되어 지기 때문에, 차세대의 유전적 영향도 암수에 의한 차는 일반적으로 없다. 그러나, 축산을 비롯한 산업 동물에서는 상품 가치, 생산 효율, 재생산 등에 암수의 성에 따른 큰 차이가 나타나는 경우가 있고, 암수 어느 한 쪽이 선택.사육되는 경우도 있다. 낙농의 암컷 소, 양계업의 암컷 병아리의 선택은 좋은 예라고 할 수 있다. 더욱이, 가축에서는 육종 목적으로 유전적으로 우량한 소수의 수컷으로 많은 암컷과 교배시키는 경우가 있고, 극단적으로 치우친 성비로 재생산을 행하는 경우도 있다. 이와 같이 산업동물에서는 성 제어의 유용성이 예상되어 기술 개발이 요구되고 있다. 산업 생산의 대부분은 자연 번식 집단으로부터의 어획물로 되어 있어, 이것들의 성 제어가 곤란하며 무의미하다. 그러나, 양식 대상종 및 종묘 방류를 행하는 재배어업에서는 그 기술 도임에 의한 효과가 기대된다. 인위적 재생산 기술이 확립되어 있는 어종에서는 양식, 증식을 불문하고 기술 개발과 도입여부를 적극적으로 검토하여야 한다. 여기서는, 재생산 기술이 확립되어, 양식 및 인공 부화 방류가 활성화된 연어.송어과 어류의 성 제어 기술 개발 상황과 실용화의 현상을 논하겠다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.10a
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• pp.71-71
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• 2017

• KOREAN JOURNAL OF CROP SCIENCE
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• v.36 no.4
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• pp.305-309
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• 1991

This experiment was conducted to investigate the effect of shattered grain by combine harvesting at the previous year on rice plant emergence at different planting methods and plant characteristics, The results are follows : Combine harvesting greatly influence on shattered grain of Samgangbyeo as Tongil variety (49.5kg/10a) compared to that of Nagdongbyeo as Japonica variety(27.8kg/10a), while Nagdong-byeo showed higher germination rate than Samgangbyeo, whether transplanted and direct seeded. Emergence of volunteer and seed mixture were lower in transplanted than in direct seeded. In variety test. Japonica variety showed higher emergence of volunteer rice and seed mixture than Tongil variety. Generally, no significant difference in yield components were observed with different varieties by the volunteer rice. But the volunteer rice caused by combine harvesting decreased culm length, panicle length, spikelet number, panicle number and ripening ratio. except l000-grain weights.

• Korean Journal of Medicinal Crop Science
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• v.7 no.3
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• pp.218-228
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• 1999

This study was conducted to obtain the information on dry matter productivity in Angelica gigas Nakai for establishing the cultivation method. Cultivation methods such as direct seeding on Mar. 31, Apr. 15 and Apr. 30, and transplanting of $8^{\frac{1}{2}}$, 9, 12 months old seedling were investigated. There were similar tendencies in changes of agronomic characters for all cultivation methods. Dry weight started to increase from 120 DAS. Direct seedling showed vigorous growth for aerial part, whereas transplanting showed better underground part. The quadratic polynomial was suitable to dry weight of root after 120 DAS (or DAT) .Short growing time had higher RGR and NAR independent of cultivation method but Direct seeding on Mar. 31 and transplanting of 9 months old seedling had the highest CGRs. LAI was positively correlated with CGR, and CGR had the highest value as $6.74\g/m^2/day$ when LAI was 1.97. RGR and NAR increased as mean temperature was increased and showed the highest value around . The highest net production of leaf and petiole was obtained at 20 and$23^{\circ}C$, respectively.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2021.04a
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• pp.41-41
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• 2021

잇꽃(Carthamus tinctorius L.)은 국화과에 속하는 두해살이 초본 식물로 한자명은 홍화(紅花), 영명으로는 Safflower를 사용하고 있다. 우리나라의 잇꽃 재배는 2010년 39ha 수준이 재배되다가 2014년에는 76ha까지 확대되었으나 점차 감소하는 추세를 보이고 있으며 2018년에는 55ha가 재배되고 있는 것으로 보고되었고 주산지는 전라남도와 경상북도로 알려져 있다. 잇꽃은 종실을 주로 한약재 원료로 사용해왔으나, 잇꽃의 어린 순을 나물용으로 생산하기 위한 재배가 늘어나는 추세이다. 본 연구는 준고랭지에서 잇꽃 나물을 생산하기 위한 재배 양식과 파종시기별 수량성 및 품질 차이를 구명하고자 수행하였다. 준고랭지에서의 가을 재배에서 파종 후 80%가 출현하기까지의 출현 소요일수는 5~7일로 나타났으며, 재배유형별 수확 도달일수는 시설 재배 9월 29일 파종이 29일로 가장 짧았고 노지 재배에서는 8월 25일 파종이 42일로 가장 길었다. 파종시기별 수확기까지의 유효적산온도는 시설 하우스에서 9월 29일 파종 후 10월 28일 수확하는 작형에서 634.4℃로 가장 낮게 나타났다. 재배 유형별 생육량을 조사한 결과 엽수 및 엽면적은 노지 재배 8월 25일 파종 작형에서 높았고 노지 9월 21일 파종 후 10월 8일 터널을 설치하는 작형에서는 경태 및 엽면적이 4.6mm, 26.2mm²로 유의하게 작은 경향을 나타냈다. 재배 유형별 건조수율은 13.8~15.1% 범위로 파종시기별로 유의한 차이를 보이지 않았으나 당도에서는 노지재배 9월 9일 파종과 9월 21일 파종에서 7.1°Bx, 7.0°Bx로 유의하게 높았고 시설 재배 9월 29일 파종에서 3.1°Bx로 가장 낮게 나타났다. 단위 면적당 생체 수량에서는 노지재배 8월 25일 파종에서 2,223.9kg/10a으로 가장 높았으며, 건조수율로 환산한 건물 수량에서도 노지 8월 25일 파종 작형에서 335.8kg/10a으로 유의하게 높게 나타났다. 노지 재배의 파종시기별 비타민 A 함량은 9월 21일 파종에서 23.3mg/100g으로 높았으며, 비타민 E 함량 또한 25.1mg/100g으로 높은 양상을 보였다.