• 한국작물학회지
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• 제64권4호
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• pp.287-298
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• 2019

본 연구는 담수직파 초기 입모율 개선을 위해 혐기발아 내성이 우수한 자원들과 국내에서 육성된 직파적응성 품종 간 담수 중 입모관련 특성을 조사하고 담수 환경이 입모 관련 형질에 미치는 영향을 분석하였다. 저온에서 AGT 3자원들의 평균 저온발아율은 92.9%, 평균발아일수 9.1일로 KV품종들의 평균 저온 발아율 62.0%, 평균 발아속도 11.2일에 비해 저온조건에서도 발아율이 높았으며 발아 속도도 빠른 것으로 나타났다. 노지 담수 조건에서 AGT 품종들의 평균 생존율은 53%로 국내 직파 품종의 평균 생존율 22.7%보다 높았으며 온실 담수조건에서도 KV 품종에 비해 입모특성이 우수한 경향이었다. 특히 KHO, PBR, WD3는 저온발아율 및 혐기발아율 등 담수직파 관련형질이 우수하여 담수 직파 전용 벼품종개발을 위한 유용 유전자원으로 활용성이 클 것으로 판단되었다. 모든 공시품종들은 저온(15℃, 18℃)의 담수조건에서 대체적으로 혐기발아율 및 생존율이 낮았으며 초엽 및 유근의 생장도 불량하였으나 21℃ 이상의 조건에서는 생존율과 혐기발아 특성이 크게 개선되었다. 초기입모 관련 형질의 변이에는 온도>용존산소>품종 순으로 영향을 미치는 것으로 나타났으며 발아율 및 유근생장 변이에는 다른 형질에 비해 용존산소 농도의 영향이 다소 크게 작용하는 것으로 나타났다.

• 한국초지조사료학회지
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• 제2권2호
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• pp.1-15
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• 1981

In reviewing of the literature concerning agronomic practices on intensive pasture establishment the following suggestions were made : (1) The seedbed preparation should be involved physical manipulation of the soil tilth and consolidation of the soil by harrows and heavy roller. (2) In terms of methods of sowing, drilling favours the first and broadcasting the second however, the apparent superiority of band sowing over the above conventional methods is to reduce the direct toxic chemical effects from fertilizers to germinating seeds. (3) The most satisfactory seeding depth for grasses and legumes is commonly agreed to be approximately 1.3cm and seeding depth greater than 2.5cm seems to be generally detrimental. (4) Autumn and spring are most common sowing periods for grasses and legumes, however, early autumn being the most generally favoured, particularly in areas not subject to severe winter kill. (5) Select nurse crop species or cultivars which make Bess demands on light, nutrients and water, and lower seed rates should be used. (6) Seeding mixtures should be simple rather than complex and aggressive species should be included to a minor extent.

• Agricultural and Biosystems Engineering
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• 제5권2호
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• pp.55-59
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• 2004

This study aimed to develop a seeder for sowing large seeds such as those of fruit vegetables used as rootstocks in grafting. It investigated how the nozzle diameter and the nozzle's vacuum pressure affected the seeding performance. This study found that a nozzle diameter of 1.5 mm was capable of sowing most of the seed sizes used in this study. The highest seeding rates for 'Chambak', 'Tuktozwa', and 'Hukjong' were $97.6\%$, $98.8\%$, and $97.6\%$, respectively. Lineup status after sowing was good. The working performance was 75.6 sheets/hr. An average seeding rate of 1 grain was $97.8\%$.

• 한국작물학회지
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• 제36권6호
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• pp.513-520
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• 1991

충남 예산에서 호밀을 답리작으로 재배할때 파종량과 예취기간가 수량 및 사료가치에 미치는 영향을 요약하면 다음과 같다. 1. 파종량이 많아질수록 호밀의 초장과 단위면 적당 경수는 증가하였으며 건물률은 감소하였다. 2. 청예 및 건물수량은 파종량이 많을수록 높았으며 예산에서 청예수량이 가장 높았던 예취기는 5월 15일, 건물수량이 가장 높았던 예취기는 5월 25일 이었다. 3. 파종량이 많을 수록 그리고 예취시기가 늦을수록조단백질, 가급태단백질 및 가소화단백질 함량은 감소하였으며, 반면에 조섬유함량(ADF와 NDF)은 증가하였다. 4. 파종량이 많을 수록 그리고 예취시기가 늦을수록 총가소화영양분(TDN) 함량과 상대적 사료가치는 감소하였다. TDN 수량은 파종량 18-28kg/10a, 5월 15-25일 수확시 가장 높았다. 5. 호밀의 에너지 함량은 파종량이 많을수록 그리고 예취시기가 늦을수록 감소하나, 단위면적당 에너지 생산량은 ENE와 NEL은 23kg/10a 파종-5월 15일 수확할때, NEM은 18kg/10a 파종-5월 15일 수확할때 가장 높았다. NEG는 18-28kg/10a 파종-5월 5일 수확할 때 가장 높았다.

• 한국작물학회지
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• 제40권5호
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• pp.548-555
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• 1995

보리의 재배양식을 협폭파, 드릴파, 휴립광산파의 3양식으로 하여 이들 재배양식별 유효분얼의 생태반응과 수량성에 대하여 비교시험을 수행하였던 바 얻어진 결과는 다음과 같다. 1. 출아율은 드릴파 > 협폭파 > 휴립광산파의 순위였으나 m$^2$당 입모본수는 휴립광산파가 334본/m 으로 가장 많았고 다음으로, 협폭파, 드릴파의 순이었다. 2. 유효개화한 분얼은 3재배양식 모두 주간, 1차분얼의 1, 2 이고 2차분얼의 11은 휴립광산파에서만 유효경화하였다. 얼자별 유효경율은 주간은 3처리 모두 100%이나 1차분얼의 1과 2는 드릴파 > 휴립광산파 > 협폭파의 순으로 많았다. 3. 평균1수 영화수는 드릴파가 39.5립으로 가장 많았고 다음으로 휴립광산파, 협폭파의 순이었고 얼자별로는 주간 > 1 > 2 > 11이었다. 1수 임실율은 드릴파 > 휴립광산파 > 협폭파의 순으로 높았다. 4. 평균1수임실립수는 드릴파 > 휴립광산파 > 협폭파의 순이었고 평균 1수 완성립수도 같은 경향이었다. 그러나 천립중은 재배양식 또는 분얼경간에 크게 차이가 없었다. 5. 1수당 자실량은 드릴파가 가장 무거웠고 다음으로 휴립광산파, 협폭파의 순이었으며 분얼시험의 m 당 자실량은 협폭파 679.8g에 비하여 드릴파 874.7g, 휴립광산파 794.3g로 각각 29%와 17%가 증수되었다. 6. 실제평예조사시험의 유효경율은 46.2~54.1%로, 드릴파재배구가 가장 높았고 협폭파재배구에서 가장 낮았다. 7. 평예조사자실중은 협폭파 567.6kg에 비하여 드릴파 31%, 휴립광산파 15%가 각각 증수하였다.

• Weed & Turfgrass Science
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• 제7권2호
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• pp.111-119
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• 2018

본 연구는 다양한 온도, 파종심도, 차광 및 토양수분함량 조건 하에서 둥근잎유홍초의 발아와 생육에 차이를 구명하여 효과적인 관리방법을 개발하는데 필요한 기초 자료로 사용하고자 수행하였다. 둥근잎유홍초 종자휴면은 1년 이상이었고, 휴면타파를 위해서는 황산에 15분 침지하는 것 가장 좋았다. 둥근잎유홍초 종자의 발아율은 $25-35^{\circ}C$에서 69-73%, $15^{\circ}C$에서 26%를 보였다. 파종 심도별 발아율은 2, 3, 5, 7, 8 cm 파종깊이에서 70-84%이었으나 12 cm와 15 cm 파종깊이에서는 각각 7%와 13%에 불과하였다. 둥근잎유홍초 종자는 무차광과 차광 정도와 상관없이 높은 발아율을 보였으나, 지상부 생체중은 차광 20%>무차광=차광 35%>차광 50%>차광 75%=차광90% 순으로 높았다. 토양수분은 포화상태의 30%와 100%조건에서는 둥근잎유홍초 종자는 발아하지 않았고, 포화상태의 60%와 80%에서 60-83%의 발아율과 최적의 생장을 보였다.

• 농촌지도와개발
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• 제24권2호
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• pp.99-115
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• 2017

The purpose of this study is to analyze potential adoption rates and reusing patterns of the new rice direct seeding technology. The model constructed and employed in this study is a system dynamics model of farmer adoption and reusing patterns for this new technology over time. The model incorporates a causal loop diagram that explains interactions among rice cultivation subsystems with feedback loops and further attempts to build a causal loop model with stock-flow diagram for computer simulation. As one example of how the model can be used to provide insight to rice farmers, simulations are run over varying levels on the cultivation process of rice. The major finding is to demonstrate the utility of system dynamics simulation methodology in aiding the rice wet direct seeding farmers' decision making.

• 한국표면공학회지
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• 제53권5호
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• pp.241-248
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• 2020

The change of the deposition behavior of diamond through a pretreatment process of the base metal prior to diamond deposition using HFCVD was investigated. To improve the specific surface area of the base material, sanding was performed using sandblasting first, and chemical etching treatment was performed to further improve the uniform specific surface area. Chemical etching was performed by immersing the base material in HCl solutions with various etching time. Thereafter, seeding was performed by immersing the sanded and etched base material in a diamond seeding solution. Diamond deposition according to all pretreatment conditions was performed under the same conditions. Methane was used as the carbon source and hydrogen was used as the reaction gas. The most optimal conditions were found by analyzing the improvement of the specific surface area and uniformity, and the optimal diamond seeding solution concentration and immersion time were also obtained for the diamond particle seeding method. As a result, the sandblasted base material was immersed in 20% HCl for 60 minutes at 100 ℃ and chemically etched, and then immersed in a diamond seeding solution of 5 g/L and seeded using ultrasonic waves for 30 minutes. It was possible to obtain optimized economical diamond film growth rates.

• 아시안잔디학회지
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• 제5권2호
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• pp.87-94
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• 1991

This study was carried out to determine the optimal seeding rate of Korean lawngrass in three different soil textures. The results obtained are summarized as follows;1.In early development, there were not significant differences in leaf length and width except for leaf width in mean seeding rates. And there was significant difference in tillering number. Tillering number of Korean lawngrass grown in sandy clay loam soil was more abudant than that grown in sandy clay and sandy loam soils.2.The rate of ground cover of Korean lawngrass grown in sandy clay loam soil was faster than that in other soils. The ground cover rate was faster in the following order: 15, 12, 10, 7, 5, 3 kg/10a. But in sandy clay loam soil, it was showed that the plot seeded at 12kg/10a be faster than that at l5kg/10a. Plots seeded from 5 to 15kg/10a in sandy clay loam soil and 15kg/10a in sandy clay soil were showed the 100% ground cover during the period of the year seeded.3.There were not significant differences in dry weight of each part measured at 11 and l4months after seeding. But there were significant differences in dry weight of shoot and total dry weight. Total and shoot dry weight of Korean lawngrass grown in sandy clay loam soil were heavier than that in others. 4.It was revealed that the optimal seeding rate in sandy clay loam soil was 12 kg/10a. But it was suggested that the optimal seeding time and rate in each soil textures be undertaken in future.

• 한국초지조사료학회지
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• 제43권4호
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• pp.199-205
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• 2023

Pasture formation and management are crucial to avoid yield reduction. This experiment aimed to examine the effects of tall fescue-centered mixed-seeding combinations on yield and vegetation changes in perennial pastures in the central region for two years, from September 2020 to October 2022. The treatments were arranged in three replications in a randomized block design: control (C), tall fescue-based mixture-1 (T-1), and tall fescue-based mixture-2 (T-2). The tall fescue (TF), orchard grass (OG), perennial ryegrass (PRG), Kentucky bluegrass (KBG), and white clover (WC) were used. The emergency rate of grasses (70.0 to 73.3%) did not differ among mixed seeding combinations. Overwintering rates (81.7 to 83.3%) were similar among treatments. The plant height of grasses was similar at each harvest date, with the highest height (86.2 cm) recorded in the second harvest of the first year, followed by that (58.4 cm) in the third harvest of the first year; it was least (38.9 cm) in the fourth harvest of the second year. There was no significant difference in the dry matter yield of grasses among the mixed seeding combination treatments in the first, third, or fourth harvests of the first year (p>0.05). For second-year grasses, dry matter yield was not significantly different in harvest date among the treatments (p>0.05). Based on mixed seeding ratio, orchard grass showed the highest yield at 70% in the C treatment, followed by tall fescue at 80% and 60% in the T-1 and T-2 treatments, respectively, in the first harvest after seeding. There was no significant difference in feed value between treatments (p>0.05), but a significant difference was observed between the third and fourth harvest (p<0.05). Therefore, it indicated that it is important to create perennial pastures in the central region through mixed seeding combinations centered on tall fescue.