• 한국초지조사료학회지
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• 제11권2호
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• pp.137-142
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• 1991

For the constitution of forage cropping system including the double-cropping of corn, attention has been directed towards the early and short maturing varieties of corn such as Comet 80, Comet 85 and Linda as a component forage crop of forage cropping system. Four corn varieties, Comet 80, Comet 85, Linda and Suwon 19 were planted delayedly by each of 45, 55 and 65 days from the recommended sowing date of suwon 19. Under these condition, growth characteristics and late-sowing adaptability of 4 corn varieties were investigated, and the results are summarized as follows; 1. The variety of suwon 19 did not reach the stage of silking in the occasion of late sowing by 50 days from the optimum sowing time for mono cropping of suwon 19. However early varieties such as Comet 80, Comet 85 and Linda silked under the condition of 65 days-delayed sowing from the recommended sowing time of Suwon 19 for mono-cropping. 2. Early varieties of Comet 80, Comet 85 and Linda were so grown by approximately 92% in plant height, 66% in ear height, 88% in stem diameter and 81% in leaf number respectively compared to Suwon 19 at each of three delayed sowing time that exhibited the dwarfish appearance of canopy. 3. Days from sowing to silking decreased as the sowing time was delayed and the average days from sowing to silking in the sowing treatments of 55 days-delayed of Suwon 19, Comet 80, Comet 85 and Linda were 61, 46, 47 and 51 days, respectively. 4. The size of variations of plant height and ear height influenced by delayed-sowing time was comparatively larger in the varieties of Suwon 19 and Linda than in those of Comet 80 and Comet 85. 5. As sowing time was delayed from the optimum sowing time of Suwon 19 for mono-cropping, ear content decreased from 0% of Suwon 19 at 55 day-delayed sowing treatment to 3540% of Comet 80 and Comet 85 at 65 days-delayed sowing treatment.

• Plant Resources
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• 제4권2호
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• pp.97-101
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• 2001

This study was carried out to determine the effect of sowing time on the flowering, growth and yield of Schizonepeta tenuifolia Briquet. Emergence and flowering dates in the sowing time from March 30 to April 30 were earlier than those of the other sowing times. In the sowing time from March 30 to April 30, length and diameter of main stem, number of node per main stem, number of branch per plant and fresh, and dry weight of stem were greater than those of the other sowing times. Yield components such as ear length, main stem length and diameter, branches per plant, number of node and ears per plant, yield of stem in fresh and dry were the highest at the sowing time from March 30 to April 30. Optimum sowing time of Schizonepeta tenuifolia Briquet were shown to be from March 30 to April 30 in southern areas of Korea.

• Plant Resources
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• 제6권1호
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• pp.11-15
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• 2003

To determine as optimal sowing time of forage rape in spring time in southern areas of Korea, forage rape cv. Velox, the highest yielding variety among introduced varieties of forage rape, was grown under five different sowing times. Yield components such as plant length, number of branches and number of leaves etc. were higher at the sowing time of Mar. 15 and Mar. 25. The plants sown at Mar. 15 and Mar. 25 also showed highest fresh and dry matter yield. When plants were grown under later sowing time, they showed higher values in content of crude protein and lower values in contents of crude fiber such as Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF), cellulose and lignin. There was no relationship between variation of In Vitro Dry matter Digestibility (IVDMD) and sowing time. The plants sown at Mar. 15 and Mar. 25 showed highest digestible dry matter yields.

• Plant Resources
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• 제7권3호
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• pp.206-210
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• 2004

In order to find out the optimum harvest (dipping) date combined with sowing date on yield and nutrient quality of forage rye which is suitable at the Southern part of Korea, Paldanghomil variety was grown Sep. 2001 to May 2002 at Sunchon National University, and yield and nutrient quality of plant were observed. As harvest date and sowing date were delayed, the plant length was longest, number of leaves per plant was increased in the time of May 20 clipping. Fresh yield was the heaviest in the time of May 20 clipping and Oct. l0 sowing, and the most dry matter yield was the heaviest in the time of May 20 clipping and Oct. 10 sowing. Content of crude protein was the highest and that of crude fiber such as NDF, ADF, hemicellulose, cellulose and lignin were the lowest in the late time of clipping and sowing. Further more IVDMD was high and dry matter yield and digestible dry matter yield were the highest in the time of May 20 dipping and Oct. 10 sowing. Judging from the results reported above, at optimum harvest (dipping) date combined with sowing date for yield and nutrient quality of forage rye seemed to be the time of May 20 clipping and Oct. 10 sowing.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.261-261
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• 2017

This study was carried out to provide basic data for spreading rice direct seeding by inducing stabilization of seedlings, yield and quality according to sowing times in rice direct seeding cultivation. In 2016, 'Sukwang' was seeded 3 times by 10 days interval on May. 10, 20, 30 and 6kg/10ha of seeding rate respectively in Iksan. In summary, the number of rice seedling establishment was higher than the optimum seedling establishment level at all sowing periods and the seeding rate was better as the sowing period was delayed. Weed development by sowing was the highest at early sowing, May 10, and decreased at late sowing. Heading dates were delayed by 3days for sowing on May 10, 7days for sowing on May 20, and 11 days on sowing on May 30. Rice yield increased with the delay sowing time and compared to the transplanting. It was 84% in sowing on May 10, 94% in sowing on May 20, and 99% in sowing on May 30. In addition, head rice ratio and head rice yield increased according to delayed of seedling.

• 한국자원식물학회지
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• 제29권4호
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• pp.504-510
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• 2016

본 연구는 중간 신육형 직립 초형 동부 계통의 파종기 이동이 생태반응과 생육 및 수량에 미치는 영향을 구명하고자 전남 나주(위도 35° 04' N, 경도 126° 54' E)에서 2013년과 2014년에 수행하였다. 시험계통으로 전남1호와 전남2호(옥당)를 이용하여 4월 중순부터 8월 중순까지 1개월 간격으로 5회 파종하였다. 출현일수는 4월 중순 파종에서 12일로 길었고, 기타 파종기에서는 5∼3일이었다. 개화일수는 4월 중순부터 7월 중순까지는 파종기가 지연됨에 따라 짧아지다 8월 중순 파종에서 길어졌다. 즉, 4월 중순 파종에서 62일 내외로 가장 길었고, 7월 중순 파종에서 35일로 가장 짧았다. 개화시에서 수확기까지의 소요일수는 4월 중순부터 7월 중순 파종에서 17∼15일로 짧았으나, 8월 중순 파종에서는 24일로 긴 편이었다. 경장은 5월 중순과 6월 중순 파종에서 긴 편이었고, 화경장은 4월 중순 파종에서 긴 편이었으며, 주경절수는 7월 중순 파종, 분지수는 4월 중순 파종에서 많았다. 전남1호와 전남2호(옥당)의 10 a당 수량은 4월 중순 파종에서 각각 199, 211 ㎏로 가장 많았고, 다음으로 7월 중순 파종에서 각각 191, 195 ㎏로 많았다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.84-84
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• 2022

The limit of crop cultivation is moving northward due to the temperature rise by climate change. There is a problem with crop growth if early sowing is performed at a time when the temperature is low. It is difficult to secure crop productivity and cultivation stability due to the low temperature and short cultivation period. Therefore, this study was conducted to analyze the change in growth characteristics and yield of corn for grain when early sowing is performed in central region of South Korea. This experiment was conducted at experimental field of Suwon in 2021. Three varieties of corn for grain such as Kwangpyeongok, Sinhwangok, and Hwangdaok were sown at intervals of 5 days from 20 March to 15 April. The planting density at this time was sown with a row interval of 70 cm and a plant interval of 25 cm. Nitrogen, phosphoric acid, and potassium fertilizers were applied at 17.4 kg, 3.0 kg, and 6.9 kg per 10a, respectively. Phosphoric acid and potassium fertilizers were all applied before sowing and nitrogen fertilizer was applied 50% before sowing and 50% in the fifth leaf period. The corn growth characteristics and yield components were investigated. The seedling establishment rate by sowing date was in the range of 68.5~88.5%, and it showed a difference depending on the variety. The range of days from sowing to tassel and silk emergence by sowing date was 79.9~98.4 and 81.0~98.9 days, respectively. As the sowing date was delayed, the days from sowing to tassel and silk emergence decreased. The growth characteristics and yield of corn by sowing date are as follows. Plant height was the highest at 241.3 cm at the sowing on 25 March, and Stalk diameter was the thickest at 25.6 mm at the sowing on 31 March. The fresh weight per plant was the highest at 728 g at the sowing on 25 March, and the dry weight per plant was the highest at 185 g at the sowing on 31 March. Corn growth characteristics did not show a certain trend depending on the sowing date, and corn growth was more vigorous at the sowing on March 25 and 31 than the others. In the case of ear weight, it was the heaviest with 344 g at the sowing on 25 March, and filled ear length ratio showed a tendency to decrease as the sowing time was delayed. The weight of 100 grains and grain yield per 10a of maize were the highest at 36.0g and 878.7kg/10a, respectively at the sowing on 25 March. Although the growth and yield of corn for grain were good during early sowing in the central region of South Korea, it is necessary to investigate the limit temperature for early sowing of corn by examining the annual variation according to weather conditions.

• 농업과학연구
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• 제45권4호
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• pp.615-622
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• 2018

This study was done to determine the optimum sowing time for spring sowing wheat in the southern region of the entire Korean peninsula. Jokyoung and Keumkangmil were sown four times at one-week intervals starting from Feb. 14, 2013. The thousand grain weights of the two wheat varieties were the highest on February 14 with the seed weights ranging from 36.6 to 40 g and significantly decreasing as the seeding time was delayed. The unmatured grain percentage increased sharply when both cultivars were sown starting on March 7. The grain yields were the highest for Keumkangmil with 3.07 MT/ha when sowed on February 21 and 3.37 MT/ha for Jokyoung when sowed on February 14. In both cultivars, the grain yield decreased drastically when they were sown on March 7. Ash content did increase when the sowing date was delayed. The flour gluten index was the highest at 96.2 in Keumkangmil with a February 28 sowing, and the sodium dodecyl sulphate (SDS) segmentation was the lowest ranging from 63.8 to 65.3 mL with the February 28 sowing. The falling number tended to increase with the delay of the sowing period. The flour milling rate was gradually decreased with the delay of sowing, and the bran gradually decreased. When both cultivars were sown after February 28, the grain and flour yields sharply decreased. In the southern region, the optimum time for the spring sowing of wheat is from February 14 to February 21.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2000년도 제7차 국제 심포지움(생약자원개발에 관한연구) 및 추계정기 학술발표회 초록집
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• pp.53-59
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• 2000

남부지방에 형개의 직파 재배의 적정 파종기를 구명하여 재배기술을 개선, 보완하고 수량을 증대시켜 안정 생산에 기여하고자 실시한 실험결과를 요약하면 다음과 같다. 1. 파종기가 빠른 시험구일수록 출현일수도 빠르고 개화기도 빨랐으며 출현 소요일 수와 개화 소요일수도 길었는데 반해 파종기가 늦은 시험구일수록 출현일수는 늦고 개화기간도 늦었으며 출현 소요일수와 개화일수는 짧았다. 2.수량구성 형질에서 경장, 분지수, 수장, 직경, 절수 및 수수는3월 30일 파종에서부터 4월 30일 파종까지는 높았으나 이보다 늦은 5월 10일부터 6월 30일까지의 파종구에서는 낮았다. 3. 10a당 생경수량은 3월 30일 파종부터 4월 30일 파종까지가 2, 107kg 이상의 높은 수량을 올렸고 건경수량 역시 1, 111.9kg 이상의 높은 수량성을 나타내 보였다.

• 한국작물학회지
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• 제69권1호
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• pp.61-69
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• 2024

남부지방(진주)에서 콩 생태형에 따라 적기파종 이후 파종 시기를 달리하였을 때 온도와 일장이 생육일수 및 수량에 미치는 영향을 조사한 결과는 다음과 같다. 1. 적기파종 이후 파종시기를 달리하여 파종하였을 때 모든 생태형에서 출현일, 개화소요일수, 전체 생육일수는 단축되었다. 2. 일장과 온도가 생육일수에 미치는 영향을 다중회귀분석으로 분석한 결과 파종~개화기까지 소요일수는 일장과 온도 모두 정의 상관이였고, 개화기~수확기까지 소요일수는 일장은 정의 상관, 온도는 부의 상관이 있었다. 3. 추정 회귀모형은 파종~개화까지 소요일수(Y) = 3.177 + (0.030 × (누적일장 + 적산온도)), 개화기~수확기까지 소요일수는 (Y) = 20.945 + (0.021 × (누적일장+적산온도))인 것으로 나타났다. 4. 수량은 적기파종에서 가장 높았고 적기파종 이후 늦게 파종할수록 수량이 급격히 감소하여 조생종은 7월 20일, 중만생종은 7월 10일 이전까지는 파종을 해야 급격한 수량감소를 피할 수 있을 것으로 보인다.