• 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.

• 한국농림기상학회지
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• 제3권4호
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• pp.177-184
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• 2001

본 연구는 벼 휴립건답직파 절수재배에 알맞은 질소 수비량을 구명하고자 파종량을 6kg/10a과 10kg/10a으로 하고, 질소 수비 시비량을 10a당 4.8kg(표준구), 2.4kg, 7.2kg 및 9.6kg을 시비 처리하여 시험한 결과를 요약하면 다음과 같다. 가. 질소 수비량이 많을수록 엽면적지수와 지상부 건물중은 약간씩 증가하는 경향이었다. 나. 출수기 광합성능은 질소 수비량이 많을수록 높았으며, 파종량간에는 6 kg/10a 파종에서 높았다. 다. 질소의 흡수량은 질소 수비량이 많을수록 많았으며, 질소 이용율은 6kg/10a 파종에서는 질소 표준수비(4.8kg/10a) 보다 50% 증시에서 가장 높았고 10 kg/10a 파종에서는 별 차이가 없었다. 라. 단위 면적당 수수는 질소 수비량이 많을수록 많았고, 등숙비율과 현미 천립중은 비슷하여, 쌀 수량은 표준(6kg/10a 파종시 수비량 4.8kg/10a 시용) 보다 50%증시(7.2kg/ha)구에서 6kg/10a 파종에서는 6%, 10 kg/10a 파종에서는 13% 증수되었다.

• 한국유기농업학회지
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• 제19권spc호
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• pp.174-177
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• 2011

Green manure crops play an important role in organic farming. Field experiment was conducted at paddy soil (fine loamy, mixed, nonacid, mesic family of Aeric Fluvaquentic Endoquepts) in 2008/2009 to 2009/2010 at the National Institute of Crop Science (NICS), RDA, Suwon, Gyeonggi province, Korea. This experiment was carried out to evaluate the biomass of hairy vetch (Vicia villosa) and growth of rice (Oryza sativa) by different seeding rates. Seeding rates of hairy vetch consisted of 30, 60, and 90 kg $ha^{-1}$ by broadcasting before rice harvesting. The biomass and nitrogen production of hairy vetch were not significantly different between 60 kg $ha^{-1}$ and 90 kg $ha^{-1}$ of seedinq rates. Also, rice yield was not significantly different between seeding rate 60 kg $ha^{-1}$ of hairy vetch and conventional practice for two years. Therefore, we suggested that seeding rate of hairy vetch should be reduced by continuous cropping and incorporation of hairy vetch under rice-based cropping system.

• 한국작물학회지
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• 제60권1호
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• pp.85-90
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• 2015

바이오 디젤용 원료작물인 카멜리나를 중국 지역에서 대량 상용재배 하기 위해서 길림성 연길 지역에서 재식 밀도, 비료 시비, 파종 시기 등이 종자 생산량에 미치는 영향을 실험하였다. 재식 밀도와 증수량의 상관 관계를 알아보기 위해서 단위면적당 다른 두 가지의 파종량을 적용했다. 0.1 ha 당 카멜리나 종자 0.23 kg을 파종한 시험구가 0.56 kg을 파종한 시험구보다 60.6 g이 증대되는 결과를 보였다. 또한 비료 시비량과 증수량의 상관관계를 알아보기 위해서 0.1ha당 질소 1.97 kg과 인 12.3 kg을 시용한 시험구, 질소 2.8 kg과 인 17.5 kg을 시용한 시험구, 그리고 무시비구를 이용해서 증수량을 분석한 결과 재배지역에 따라 상이한 결과를 보였다. 다른 실험 결과와 비교하면 상당히 낮은 시비량에도 증수량이 포화되는 결과를 보이는 것으로 봐서 시험구 포장 자체가 상당한 양의 비료 성분을 포함하는 것으로 추정되며 통상적인 농경지 재배에서는 추가적인 시비 효과가 크지 않을 것으로 여겨진다. 파종 시기에 따른 종자수확량은 동일한 생육 기간을 거치더라도 5월 4일에 파종을 한 후 수확을 하는 것이 5월 29일 파종한 것보다 높은 생산량을 보였다. 이 결과는 빠른 파종 시기가 종자 생산량에 긍정적인 영향을 미친다는 것을 의미하므로 최대한 파종 시기를 앞당기는 것이 종자의 생산량을 늘리는데 도움이 될 것이라고 판단 된다.

• 한국초지조사료학회지
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• 제20권1호
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• pp.49-54
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• 2000

A field experiment was carried out to determine the effects of seeding methods and rates on the growth characteristics, forage yield and nutritive value of sorghum X sudangrass hybrid (Sorghum bicolor (L.) Moench, cv. Pioneer 988) grown under application of animal manure in 1995. The application amount of animal manure were 40MT in cattle manure, 30MTha in swine and poultry manure. The methods and rates of seeding treated in this study were drill of 30kg, and broadcast of 30, 60 and 100kgha of seeding rates. The plant height was 180cm, 191cm and 204cm in cattle, swine and poultry manure, respectively. Plant height in the plot of drill was higher by about 15cm than those of broadcast plots. The dry matter(DM) yield was 7.73, 8.87 and 9.80MTha in cattle, swine and poultry manure, respectively. A significant higher forage yield was produced in the plot of drill, compared with broadcast(Pc0.05). DM yields in broadcast of 60kg and lOOkg of seeding rates were higher than that of 30kg of seeding rate of broadcast. However, no significant difference in forage yield was found between 60kg and IOOkg of seeding rates. The average DM yield was 11.16, 6.94, 8.26 and 8.83MTIha in drill(30kg), broadcast 30, 60 and 100kgIMT of seeding rates, respectively. The nutritive value of sorghum x sudangrass hybrid was very similar among treatments. The crude protein yields were 1,010kg in cattle manure, 1,180kg in swine manure, and 1,592kg in poultry manure. The protein yield was significantly high in the plot of drill. In conclusion, seeding by drill was recommended for forage production and protein yield of sorghumxsudangrass hybrid, and proper seeding rates were 30kg in drill and 60kg in broadcast. (Key words : Sorghumxsudangrass hybrid, Seeding rate, Seeding method, Forage yield, Nutritive value, Animal manure)

• 한국초지조사료학회지
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• 제18권2호
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• pp.113-122
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• 1998

This experiment was conducted to establish the cultural method of triticale(Triticum Secalotriticum Saratoviense Meister) as a whole crop silage by evaluating the effect of seeding date and nitrogen fertilization rate on forage yields and feeding value. Heading date, flowering date, and the dough stage of development came significantly earlier as triticale was seeded earlier. Soilage, dry matter yields and percent dry matter significantly varied with seeding dates and crude ash, NFE and TDN. However, TDN yield was significantly reduced by delayed seeding. Macromineral contents were not affected by seeding date. Soilage, dry matter yield, and percent dry matter significantly increased as nitrogen fertilization rate increased. The contents of crude protein, crude fat, crude ash, NFE, TDN and TDN yield also significantly increased. In contrast, crude fiber content of triticale decreased with increasing N fertilization rate.

• 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.

• Journal of Ginseng Research
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• 제22권4호
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• pp.299-303
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• 1998

To know possibility of raw ginseng production for white- and red-ginseng by direct-sowing culture, seeds were directly sowed or seedlings were transplanted at soil condition of sandy loam in ginseng field. After cultivation, the characters of 5-year-old ginseng were investigated. Number of survived plants was increased with increase the seeding quantity in direct-sowing culture, the survived plants in direct-sowing culture was higher than that of transplanting one. Rate of the numbers of survived plants to numbers of seeds sowed in plots of 134 or 90 seeds sowed per tan, 180 x 90cm area, inspire of high number of survived plant was high compared to that of transplanting culture. Occurrence rate of rusty root of ginseng in direct-sowing culture was low significantly compared to that of transplanting culture. Root yield showed in the order of 134, 268, 90 seeds sowed, the values of yield in direct-sowing culture were high obviously compared to that of transplanting one. Individual root weight was increased with decrease the seeding quantity, however, the root weight in plot of 90 seeds sowed showed almost equal the weight in transplanting culture. The number of usable raw ginseng for white- and red-ginseng was increased with decrease of the seeding quantity; the numbers were higher than that of transplanting culture remarkably. We concluded that optimum seedling rate in direct-sowing culture of ginseng was 90 to 134 seeds per tan considering the yield per area and production rate of large root.

• 한국잡초학회지
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• 제12권3호
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• pp.200-222
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• 1992

The results of recent researches for improvement of seedling stand in direct seeded rice on the dry paddy in Korea were summarized as the following ; a variety to be cultivated should be chosen the characteristics of high percentage germination under low temperature, shorter period of shoot emergence, and better growth of the mesocotyl and shoots. Meanwhile, there was 40% increase in seedling stand at the treatment of removal of the seed awn under using the drill seeder. After seeding the rice seed covered with soil of 3cm depth was better seedling emergence and also there was the hightest seedling emergence at the 70% of moisture content of the soil. In addition, the application of the Release containing GA 10% enabled to increase the seedling stand and furthermore it was effective under deep seeding depth. The optimum seeding date should be seeded around May 10 when mean air temperature is above 12-13$^{\circ}C$ so that may establish more less 70% in seedling stand. Based on an appropriate seedling stand of 150/$m^2$, the optimum seeding rate was 5kg/10a. It was the best in seeding method using drill seeder and the most desirable recommended seeding method was the drill seeder in terms of seedling stand. In order to improve seedling stand water management was more effective in canal irrigation and in drainage at 6hr after irrigation following by the seeding process. On the other hand, for the increase of seedling stand under flooded condition a variety might have characters being better germination at low concentration of dissolved oxygen and vertically deeper growing of the crown root. Also, seedling stand was able to increase with the seed coating of $CaO_2$in the flooded soil. It was possible to be seeded on the early part of May being mean air temperature of avove 10$^{\circ}C$ and the optimum seeding rate was 5kg/10a. For an effective water management water would be flooded up to 3cm depth for 2-3 weeks after seeding. The rice plant grown under the direct seeded cultivation might be not so much strong in lodging resistance compared to that grown under the transplanting and moreover direct seeded rice cultivation under flooded condition would be more weak growth of the rice plant than that on dry paddy. Meanwhile, the lodging would be affected by the seeding rate, the soil depth after seeding. and seeding method even in the same variety. In particular, roots in the lodging pattern of direct seeded rice cultivation under flooded condition were largely distributed on the soil surface so that resulted easily in the lodging. In general, the lodging resistance would be greater as seeding rate and amount of N fertilizer application are lower and soil depth after seeding is higher. Among the introduction of different seeding method the high ridged drill seeding method on dry paddy soil resulted in the lowest in the lodging index and also it was lower in the drill seeding method than in the scattering seeding method under flooded condition. In case of more than 150 seedlings per $m^2$ there was a severe lodging due to high lodging index at the 3rd and 4th internodes. The effective lodging prevention was able to at the treatment of the Inabenfide at 45 days before heading and the Uniconazol at 15 days before heading which caused the shortage by 10-15cm in culm length. Also, fertilizer management using split application of nitrogen would be contributed the reduction of lodging at the rate of 20-30-20-20-10%(basal-5th leaf stage-7th leaf stage-panicle initiation stage-heading stage) on the dry paddy soil.

• 생명과학회지
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• 제13권6호
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• pp.757-763
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• 2003

본 시험은 율무재배에 적절한 토양수분조건과 파종기 및 질소시비방법를 구명하기 위하여 토양수분은 자연강우에 의존하는 밭 상태의 대조구와 인위적으로 포화상태를 유지시키는 관개구로 구분하여 처리하였고, 파종기는 6월 10일, 6월 20일, 6월 30일에 각각 파종하였으며, 질소시비는 전량기비와 파종기 및 출수기에 50%씩 분시하는 방법 등으로 하여 율무의 생육과 수량 및 수량구성요소의 변화를 시험한 결과는 다음과 같다. 파종기가 빠를수록 출수 및 성숙기가 빨랐고, 출수일수는 파종기가 지연될수록 감소하는 경향이었으며 성숙일수는 처리간 차이가 인정되지 않았다. 토양수분은 관개구에서 자란 율무가 대조구에서 자란 율무에 비하여 간장과 경태는 컸으며, 파종기가 빠를수록 현저하게 증가하였고, 분얼수도 대조구에 비해 관개구에서 현저한 증가를 보였으며 만파할수록 분얼수가 감소하였다. 지상과 지하부의 생육은 관개구가 대조구에 비하여 왕성한 생육을 보였으며, 파종기가 지연될수록 현저하게 감소하는 경향이었다 개엽 광합성속도는 대조구에 비하여 관개구가 훨씬 높았으며, 엽고병 발병율은 관개구가 낮았다. 관개구가 대조구보다 천립중이 무거웠고 수량은 증가하였으며, 불임율은 관개구가 대조구보다 낮았고, 파종기가 빠를수록 천립중이 무거웠고 수량도 증가하였다.