• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.129-129
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• 2022

The production area of Italian ryegrass feed is gradually increasing and labor-saving technologies are being developed. If sowing and fertilization are carried out agricultural drones, working hours and labor are reduced. The purpose of this study is to suggest an appropriate seedling amount for feed production by drone spreading of Italian ryegrass in spring. In addition, we would like to review the productivity of the drone seeding machine that is being developed by Rural Development Administration(RDA) of Korea. Italian ryegrass was sown by a drone in February at the NICS located in Gyehwa-hwa, Jeollabuk-do, South Korea. In Experiment 1, 50kg/ha, 60, 70, and 80 seeding rates were sown with a horizontal spreader drone. In Experiment 2, uniform spreaders type drone and horizontal spreader type were sown with the same seeding amount and compared. The drone was sown using the AF-52 aircraft. The higher the seeding amount, the higher the emergence rate. As the seeding amount increased, the plant length increased, but the number of tillers per individual decreased. The dry matter weight of the feed was the highest at 1,326kg/10a at the seeding rate of 70kg/ha, and decreased by 20.5% at the seeding rate of 80kg/ha. The coverage ratio was the highest at 96 at the seeding rate of 70kg/ha, which was the most advantageous for spring sowing. In the comparative experiment according to the spreader type, the uniform spreader had a high emergence rate per unit area. When the uniform spreader was used, the dry matter weight of the feed was 17% higher than that of the horizontal one, and the coverage was about 5% higher.

• 한국환경복원기술학회지
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• 제2권2호
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• pp.33-42
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• 1999

The objective of this study was to determine the optimal amount and the mixture ratio of seeds for revegetation species by investigating their growth characteristics. For the purpose of the experiments, 15 plants were chosen. In May of 1995 to September of 1998, the nursery seedbeds of the College of Agriculture and Life Sciences, Seoul National University were seeded with the mixtures of those species. Then, the nursery seedbeds were treated to investigate the effects of the amount of seeding, the amount of fertilizer, and the depth of soil on the growth characteristics. As the results of the experiments, it was found that the effects of all the treatments on growth of shoots and roots were significant in the early phase. For the expected number of seedlings more than 3,000 per square meter, many seedlings got withered to death while the survivors were suppressed to grow slow in the early stage due to the density problem.

• 한국약용작물학회지
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• 제8권1호
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• pp.64-68
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• 2000

소회향 재배법 확립을 위한 파종기와 파종방법 및 파종량이 생육과 수량에 미치는 영향을 시험한 결과를 요약하면 다음과 같다. 1. 3월 17일 이후에 파종한 구에서는 개화기의 지연이 관찰되었고 4월 16일 파종한 구에서는 성숙기의 지연도 관찰되었다. 2월 17일 파종구와 3 월 2일 파종구에서는 도복으로 수량 감소가 조사되었다. 2. 4월 1일 파종을 기준으로 할 때 파종일부터 출현기까지의 15일을 제외한 출현기부터 성숙기까지의 소요 일수는 115일로 나타났다. 3. 파종방법으로 보면 산파보다는 조파가 14% 의 수량 증가를 보였고, 파종량으로 보면 3 l /10a 가 1 l /10a 보다 24%의 수량 증가를 보였다. 4. 파종방법과 파종량을 비교해 보면, 조간 30cm 조파의 2 l /10a 와 3 l /10a 가 각각 22.2kg/10a와 23.2kg/10a 로서 가장 높았다.

• 한국토양비료학회지
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• 제47권6호
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• pp.425-431
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• 2014

Most fields in highland areas are covered with rye or hairy vetch for conservation during a fallow. However, using cover crops needs an effort to sow, and this makes top soil more vulnerable to loss due to surface disturbances. The aims of this study were to develop an automatic seeding-regulator device using a low-price, extensive-use GPS sensors and a DC motors and to evaluate a working efficiency of it after adaptation to partial tillage machine for reducing seeding effort. The amount of runoff water and soil loss was evaluated with partial tillage and simultaneous-seeding after harvesting soybean, in 17% slope lysimeters. In results, the seeding amount with the machine speed was stable between $0.5{\sim}0.8m\;s^{-1}$ of working sections. The automatic control device of seeding-rate could be enough to solve the slip problems of power selecting supply system or five four-wheel drive device. In partial tillage and simultaneous seeding, runoff water was 11.6% ($1.8m^3ha^{-1}$) of the scatter-seeding control ($15.5m^3ha^{-1}$) and soil loss was 13.2% ($7kg\;ha^{-1}$) of the scatter-seeding control ($53kg\;ha^{-1}$). These results suggest that partial tillage and simultaneous-seeding methods are very effective in decreasing work effort and soil loss of sloped land.

• 한국자원식물학회지
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• 제25권6호
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• pp.700-706
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• 2012

Influences of different seeding dates on growth, seed yield, fatty acid composition and oil content were investigated in flax plants for two years. The results indicated that plant height in early seeding date was higher than that of delayed seeding dates during first season. Furthermore, seeding date also significantly affected the ripened seed rate and the rate increased with the delay in seeding date in first season. Seed yield in the first crop season was significantly higher than the second crop season. Palmitic acid showed variation in different seeding dates. Contrarily, stearic acid was stable and did not changed by different seeding dates. Linolenic acid was found in highest amount in all seeding dates consecutively in two cropping years. Highest oil content was recovered from the seeds of flax sown at 29 Apr. and May 9 in first and second cropping year respectively.

• 한국작물학회지
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• 제47권6호
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• pp.448-452
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• 2002

벼 자동화 육묘시설에서 파종기별 적정 파종량을 선정하기 위하여 실험한 결과를 요약하면 다음과 같다. 1. 파종기에 따른 묘특성은 상자당 파종량이 증가할수록 초장은 커지는 경향을 보였으나, 묘충실도는 감소하였다. 2. 이앙기별 파종량에 따른 본답 생육 특성은 파종기에 관계없이 파종량이 증가할수록 이앙 초기에는 초장은 커지고 분얼수는 증가하였으나 이앙 40-50일 이후부터는 파종량간에 큰 차이를 나타내지 않았다. 3. 파종량에 따른 수량성은 5월 25일 이앙구에서는 파종량 간에 유의성이 없이 200g 파종구에서 수량이 가장 높았으며, 2모작인 6월 20일 이앙의 경우는 200-250g 파종까지는 유의성이 없었으나, 200-250g 파종구와 300g 파종구에서는 유의성 있는 차이를 보였다.

• Journal of Biosystems Engineering
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• 제30권5호
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• pp.261-267
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• 2005

In order to save labor and cost, direct seeding has been considered as an important alternative to the machine transplanting in rice cultivation. As current seeders for direct seeding of rice seeds drill irregular amount of seeds under various operating conditions, conventional drilling should be turned to precision planting which enables accurate placement of proper amount of rice seeds at equal intervals within rows. In this study, design, construction and performance evaluation of a precision seed metering device for planting of rice seeds were carried out. As prototype, the conventional roller type seed metering device was modified for planting: increasing diameter of metering roller, setting 2 or 4 seed cells on metering roller, adding seed discharging lid and its driving cam mechanism. Through performance tests for prototype and the current seed metering device, number of seeds in a hill, planting space and its error ratio, coefficient of variation of planting space (planting accuracy), and seeding length of $90\%$ of seeds in a hill divided by planting space (planting precision) at setting planting spaces of 15, and 20cm, seeding heights of 10, and 20cm, and seeding speeds of 0.1, 0.2, and 0.5m/s were investigated. Prototype showed better seed planting performance than the current seed metering devices. When setting planting space of 15 cm and seeding height of 10cm, prototype with 2 seed cells showed that variations of planting space and seeding lengths of $90\%$ of seeds in a hill at up to seeding speed of 0.5m/s were within 0.9cm, and 3.6cm, respectively.

• 한국산림과학회지
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• 제85권2호
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• pp.271-279
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• 1996

이 연구는 비탈면 녹화용(綠化用) 자생목본(自生木本)과 초본종자(草本種子) 적정혼파비(適定混播比)를 결정하기 위해, 서울대학교 농업생명과학대학 실내온실에서 목본(木本) 초본종자(草本種子)의 파종실험(播種實驗)을 실시하였으며, 파종(播種)은 목본(木本)의 경우 초기발아기대본수 60립(粒)/$m^2$을 기준으로 초본종자(草本種子)와 혼합하여 복토량(覆土量), 시비처리(施肥處理), 파종량별(播種量別)로 실험하여 얻은 결과를 분석한 것이다. 1994년 6월 파종후(播種後) 목본(木本)과 초본(草本)의 개체수(個體數), 생중량(生重量), 수고(樹高)와 초고변화(草高變化), 분얼수(分蘖數)를 조사한 결과, 목본(木本)의 개체수(個體數)는 1995년에 싸리가 파종구(播種區)($m^2$)별(別)로 평균 1.14본(本), 족제비싸리 0.496본(本)이였으며, 조팝나무와 물오리나무는 파종 발아후 당해년도(1994)에 고사하였다. 초본(草本)의 경우는 1995년에 달맞이꽃이 5.06본(本), 솔새 1,072본(本), 개솔새는 0본(本)이였으며, 억새는 412.53본(本), 쑥 88.6본(本), 비수리 8.9본(本), 새 57.46본(本)으로 조사되었다. 지상부생장(地上部生長)에 있어서, 목본(木本)의 싸리와 족제비싸리는 급격한 지상부생장(地上部生長)과 생중량(生重量)의 증가를 보이고, 초본(草本)의 경우에는 파종 당해년도에 솔새, 개솔새, 억새, 달맞이꽃, 새 등은 생장(生長)이 빠르나 파종 이듬해에는 솔새와 억새가 지상부(地上部) 및 생중량(生重量)의 증가가 높았다. 파종량(播種量)에 따른 목본(木本)의 변화를 보면, 파종 당해년도에는 수종(樹種)간에 유의성(有意性)이 없었으나, 파종 이듬해에는 파종량(播種量)에 따라 유의(有意)하였고, 초본(草本)의 경우는 파종량(播種量)과 개체수(個體數)의 변화는 파종당해년도와 이듬해 모두 유의(有意)하였다. 분얼(分蘖)이 가장 우수한 것은 억새(21개)로 나타났으며, 다음은 솔새, 새 순으로 나타났다. 녹화용(綠化用) 자생목본종자(自生木本種子)와 초본종자(草本種子)의 혼파(混播)에서, 초본(草本)의 종자량(種子量)이 많을수록 목본(木本)의 개체수(個體數), 지상부(地上部) 생장량(生長量), 생중량(生重量), 초본분얼수(草本分蘖數) 등은 감소하였다. 따라서, 비탈면의 녹화식생(綠化植生)으로, 목본(木本)은 싸리와 족제비싸리, 초본(草本)으로는 분얼(分蘖)이 우수한 새류(類)를 이용하는 것이 효과적이라 분석되며, 목본(木本)의 성립(成立)을 위해서는 파종량(播種量)에 대한 연구가 더욱 수행되어야 할 것이다.

• 한국약용작물학회지
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• 제18권2호
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• pp.70-73
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• 2010

This study was carried out to clarify the difference of growth characteristics and ginsenoside content in 5-year-old ginseng root grown by direct seeding and transplanting cultivation. Root weight per plant of direct seeding cultivation was lower than that of transplanting cultivation. Fresh and dry matter partitioning ratio of direct seeding cultivation was high in main root and low in lateral because direct seeding cultivation root elongated the length of main root, while it suppressed the growth of lateral root. Total amount of ginsenoside contents by direct seeding and transplanting cultivation were 362.8 and 320.3 mg in main root, 188.6 and 548.8 mg in lateral root, 170.7 and 273.8 mg in fine root. Its contents of whole root per plant were 722.1 and 1142.9 mg by direct seeding and transplanting, respectively.

• 한국작물학회지
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• 제37권6호
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• pp.541-549
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• 1992

벼 담수표면직파재배시 파종기 및 품종을 기상 및 재배 환경과의 관계를 구조적으로 분석하여 담수직파에서 흔히 발생하는 도복의 방상대책과 후기등숙생리를 검토한 결과는 아래와 같다. 1. 초기생육형수질중에서 출아일수는 조기파종일수록 길었으며 단립면적당 입묘수 및 입묘율은 파종이 늦을수록 그리고 만생종일수록 많고 양호하였다. 2. 단립면적당 수수는 파종이 늦을수록 감소하였으며 유효경비율은 만파인 5월 21일 파종구에서 가장 낮았다. 출수개화일수는 파종기가 늦을수록 단축되었으며 등숙기간중 강우분포는 조생종의 등숙기에 많았고 중ㆍ만생종의 등숙기에는 비교적 적었다. 파종기별 및 품종의 숙기별 포장도복정도는 파종이 빠를수록, 그리고 숙기가 빠를수록 컸다. 5. 수량 및 수량구성형질은 파종이 빠를수록 많고 양호했으며 특히 등숙비율은 그차이가 뚜렸하였다.