• Journal of Ecology and Environment
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• 제29권6호
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• pp.495-501
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• 2006

간벌 후4년이 경과된 삼나무와 편백 채종원(제주도 서귀포시 상효동)을 대상으로 간벌 효과를 구명하고자 간벌 강도별(0, 20, 40, 60%)로 토양의 화학적 특성, 구과 및 종자 특성, ha당 종자 생산량, 그리고 종자와 구과 내 양분 함량 등을 조사하였다. 간벌 강도별로 토양 분석을 실시한 결과, 수종 간에는 통계적으로 유의적인 차이가 없었으나 편백 채종원에서는 전기전도도, 전질소, 그리고 칼륨 농도 등에서 간벌 강도에 따라 유의적인 차이(p<0.05)가 나타났으며, 삼나무 채종원에서는 칼슘 농도에서만 유의적인 차이(p<0.05)를 나타냈다. 한편, 편백 채종원에서는 간벌 강도가 강해질수록 구과 결실량이 많아졌으나(p<0.05), 삼나무 채종원에서는 간벌 강도에 따른 차이가 없었다. 아울러, 두 수종 모두 간벌 강도가 강해질수록 종자가 크고 무거워지는 경향을 보였으나 통계적인 유의차는 나타나지 않았다. 또한 ha당 종자 생산량에 있어서도 편백과 삼나무 채종원 모두 간벌 강도에 따라 고도의 유의성(p<0.01)이 인정되었다. 편백 채종원에서는 간벌 강도가 강해질수록 종자 생산량이 증가한 반면, 삼나무 채종원에서는 간벌 강도가 강해질수록 종자 생산량이 감소하는 경향을 보였다. 종자와 구과 내 양분 함량의 경우 두 수종 모두 간벌 강도에 따른 차이는 없는 것으로 나타났다.

• The Korean Journal of Ecology
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• 제21권6호
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• pp.809-814
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• 1998

Changes of annual seed production related to climate change were studied for 12 years in Piagol, a riparian valley in Mt. Jiri. Sixty-four seed traps (sized 0.5 ${\times}$ 0.5 $m^{2}$) were set up on the forest floor of surveyed area. Seeds were collected from these traps at an interval of 15 days from September to November since 1984. Vegetation of the study area was mainly consisted of the naturally regenerated Carpinus tschonoskii in the tree layer. Acer mono, Quercus serrata, Carpinus laxiflora and Symplocos chinensis also appeared in the same layer. Maximum production occurred in 1984 and 1994. As a result of comparing seed production with local climate factors for 12 years, seed productivity and the year of maximum production of Carpinus forest were merely related with precipitation, air temperature and duration of sunshine among local climate factors. Duration of sunshine was, however, not contributed to periodically high productivity of seed of riparian valley carpinus forest.

• 한국초지조사료학회지
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• 제36권4호
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• pp.340-343
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• 2016

The present study investigated the effects of different seeding rates on growth characteristics and seed productivity of the "Kowinearly" cultivar of Italian ryegrass (Lolium multiflorum Lam.) in paddy fields. Sowing Kowinearly in paddy fields under growing rice at the rates of 20, 30, 40, and 50 kg/ha resulted in seed yields of 1.57, 1.92, 2.06, and 2.09 ton/ha, respectively. Seed yield of Kowinearly was the highest at a seeding rate of 50 kg/ha (p<0.05), at which the cultivar was able to survive in winter and the weed ratio was low. Under these conditions, most growth characteristics such as winter survival (85%), weed ratio (10%), stems per square meter (1,006) were superior than those sown at other seeding rates (p<0.05). In addition, it has been reported that the economic efficiency of the 50 kg/ha seeding rate was higher than that of the other seeding rates.

• 한국산림과학회지
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• 제97권2호
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• pp.135-139
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• 2008

Seed production and germination could be influenced by some factors. The picking time and climate factors are regarded as the elements to obtain sound seeds. We have observed the seed productivity and germination of seeds from trees of Chamaecyparis obtusa selected in a clonal seed orchard. Depending on picking time, various shapes from liquid material, something jellied to the fully matured one were observed. Germination aspects varied throughout the test days. After 20days of seeding in a glass petri-dish, germinal apparatuses appeared from the all seeds which had been picked from after at the end of August. The highest germination rate of about 30% was observed from the seeds picked from $20^{th}$ of September and $10^{th}$ of October. Seed production was about two times higher in 2005 than in 2006 and the average germination rate was also higher in 2005. We have also analyzed the effects of climatic factors about two consecutive years on seed productivity. Among the climatic factors, monthly sum of temperature and of precipitation were the main factors for maturation of Chamaecyparis obtusa seeds.

• 한국자원식물학회지
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• 제22권6호
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• pp.513-517
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• 2009

Seed mustard is high in nutrient quality and grows continuously under cold condition. Accordingly, it possessess high potential to bring about more efficient use of land when it is grown as a seasonings crop at paddy field in winter season. Recently, Seed mustard has aroused people‘s interest as a catch crop. The purpose of this trial is to examine productivity and chemical components of seed mustard and to select suitable variety in the southern area of Korea. Seed-mustard cv. Yeongsanpo local showed higher seed yield than any other varieties used in the experiment. It showed relatively high content of Oil, Protein, Ash, Carbo, $P_2O_5$, $K_2O$, Ca and T-N. The heritabilities of all the characters were estimated to be high. Therefore, it was concluded that Youngsanpo local was the most suitable variety with high yield and high nutrient quality at the southern area of Korea.

• Plant Resources
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• 제6권3호
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• pp.178-182
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• 2003

This study was conducted to investigate the relationship between yearly variations of climatic elements and yearly variations of productivity in perilla. In addition, correlation coefficients among yield and yield components were estimated. The data of yield and yield components were investigated for 10 years from 1991 to 2000. The meteorological data gathered at the Yeosu Weather Station for the same period were used to find out the relationships between climatic elements and productivity. Yearly variation of the amount of precipitation in September was large with coefficients of variation(c. v.) of 11.1%, but the coefficient of variance(c. v.) in July and August were relative small with 1.8, 2.1%, respectively. Number of cluster per hill and weight of 1,000 grains were greatly with c. v. of 76.1, 79.3%, respectively, but the coefficients of variance(c. v.) of plant height and seed yield were more less with 9.58, 10.60%, respectively. Correlation coefficients between precipitation of September and seed yield were positively significant correlation at the level of 5.1%, respectively, but the duration of sunshine in September and seed yield were negatively significant at the level of 5.1%, respectively. Correlation coefficients of these, the plant height, number of branches per plant, cluster length, number of cluster per hill, weight of 1,000 grains and seed yield were positively significant at the level of 5.1% respectively.

• 한국작물학회지
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• 제66권4호
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• pp.428-434
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• 2021

본 연구는 중북부 지방인 강원지역 중 춘천, 원주, 강릉에서의 이탈리안 라이그라스 품종인 코윈어리의 종자 생산량 및 기상과의 관계를 분석하여 재배 가능성을 검토하기 위해 2018년부터 2020년까지 재배 시험을 실시하였다. 1. 이탈리안 라이그라스 코윈어리 품종의 출수기는 1년차(2018~2019), 2년차(2019~2020) 모두 강릉이 파종 후 221일로 춘천(파종 후 226일['19], 파종 후 234일['20])과 원주(파종 후 230일['19], 파종 후 236일['20])보다 빨랐으나 남부지방과 중부지방의 일부 지역보다는 세 지역 모두 출수기가 늦었다. 2. 등숙율은 1년차(2018~2019)에는 강릉이 93.1%로 가장 높았으나 2년차(2019~2020)에는 춘천, 원주, 강릉 모두 80% 이상의 등숙율을 보여 유의한 차이가 없었고, 천립중은 1년차(2018~2019), 2년차(2019~2020) 모두 강릉(2.82 g['19], 3.12 g['20])이 춘천(2.06 g['19], 2.58 g['20]), 원주(2.21 g['19], 2.52 g['20])보다 무거웠다. 3. 이탈리안 라이그라스 코윈어리 품종의 종자생산량은 춘천(55.8 kg/10a['19], 157.1 kg/10a['20])과 원주(68.9 kg/10a['19], 178.2 kg/10a['20])는 유의한 차이가 없었으며, 강릉(171.7 kg/10a['19], 250.6 kg/10a['20])은 춘천과 원주보다 종자생산량이 많았다. 4. 상관관계 분석에서 이삭길이, 이삭당 소수, 이삭당 립수는 4월의 최저기온, 등숙율, 천립중, 종자 생산량은 5월 최저기온과 양의 상관관계를 보여 4월과 5월의 최저기온 상승에 의하여 이탈리안 라이그라스 종자 생산량이 증가할 것으로 보인다. 춘천, 원주, 강릉 모두 이탈리안 라이그라스 재배가 가능하지만 춘천과 원주의 경우 재배 최적지로 보기는 어렵다. 하지만 지구 온난화로 기온이 상승하고 있기 때문에 시간이 지날수록 춘천과 원주도 이탈리안 라이그라스의 종자 생산량이 증가하여 재배가 최적인 지역으로 될 것으로 보인다.

• 약학회지
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• 제44권1호
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• pp.60-65
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• 2000

The yeast extract, coconut water, safflower seed oil, arachidonic acid, linolenic acid, jasmonic acid and methyl jasmonate were added to Gamborg's B$_{5}$ medium. The changes on productivity of baccatin III were estimated every 30 minutes and the results were compared using the selected high yielding cell culture system of Taxus cuspidata. In most cases, the peaks of baccatin III productivity occured at 90~120 min after addition of elicitors. Among the compound elicitors, safflower seed oil showed the highest productivity of baccatin III. Also arachidonic acid and linolenic acid increased the baccatin III production.

• 한국초지조사료학회지
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• 제35권2호
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• pp.119-124
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• 2015

국내육성 톨 페스큐 신품종 푸르미의 종자생산 기술개발과 채종짚의 사료가치 평가를 통해 국내에서 종자생산 체계를 확립하고자 국립축산과학원 초지사료과 시험포장에서 휴폭과 이른 봄 질소 시용량에 따른 종자생산성을 조사하였다. 휴폭 및 이른 봄 질소 시용량에 따른 주요 생육특성은 처리에 따른 차이는 나타나지 않으나 경제성을 고려한 국내육성 톨 페스큐 푸르미 품종의 종자생산성은 휴폭을 15 cm와 이른봄 질소시비량을 90 kg/ha로 처리하는 것이 2톤 이상 안정적인 종자생산을 할 수 있었다. 또한 휴폭이 좁을수록 이삭수 및 종자수량이 높게 나타났으며 이삭의 길이는 휴폭이 넓을수록 더 길었다. 채종종자의 첩립중은 약 2.2g, 발아율은 90% 내외로 나타났다. 휴폭 및 이른 봄 질소 시용량에 따른 채종짚의 생산성은 휴폭이 좁을수록 건물생산성이 높았으나 시비량간에는 일정한 경향이 없었다. 채종후 남은 1차 수확 채종짚은 평균 6,920 kg/ha 생산되었고, 채종 후 2번의 수확에서 건초는 평균적으로 8,134 kg/ha 생산되었다. 채종짚의 일반 조성분 함량은 양질의 건초보다는 다소 낮은 사료가치를 나타내었다.

• 한국유기농업학회지
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• 제19권spc호
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• pp.6-8
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• 2011

In order to produce the organic foods in accord with international standard, organic seeds should be used in organic farming. This study was conducted to establish the stable production of organic seed of waxy com by examining the growing characteristics, seed yield, and the economy for seed production by organic farming. The optimal sowing timing for organic seed production of waxy com hybrid was within 10 days of the $1^{st}$ of May with yield of 88~90% of conventional seed production. The optimal planting density was 41,600 plants/ha ($80{\times}30$ cm) for organic seed production of waxy com. The weight of 100 seeds and seed productivity increased at the planting ratio of 2:1 mother plant:male plant. Growth and seed production were improved by removing male plant at 7~10 days after silking. Organic fertilizer (mixed oil cake) was applied at a rate of 4~6 Mg/ha before sowing. Black plastic mulching was used for weed control. In addition, sex pheromone trap and bio-control agents were used for safe pest control and low labour cost.