• Plant Resources
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• 제4권1호
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• pp.6-12
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• 2001

Growth and yield of licorice were investigated under the different conditions of ridge height, planting density, and irrigation in order to establish its cultural practices for the domestic production with the aim to substitute the import. Seedlings were grown under low ridge(20cm) and high ridge(40cm) in low density plot(60$\times$30cm) and high density plot(40$\times$30cm), respectively. The low ridge cultivation of large seedlings increased plant height and root length under low density, and stem and root diameter under high density compared to the high ridge cultivation. In the high ridge cultivation, high density plot was 1.1 to 1.3 times in plant height, root length, stem and root diameter as high as low density one. Fresh and dry weight of plant and root in high ridge were 1.3 to 1.5 times as high as those in low one. The growth of small seedlings(4~10g) were generally poor compared to that of large seedlings. High density plot in low ridge showed the good growth characteristics including plant height, root length, stem and root diameter, and number of branch. High density plot was 1.4 to 1.6 times in fresh and dry weight of plant and root as high as low density plot. In the seasonal changes of growth under various irrigation regimes, the twice irrigation a day produced the more number of leaf than the other regimes since around 46 days after transplanting. The former irrigation resulted in 1.2 to 1.4 times in plant height as long as the other irrigations around 26 days after transplanting and then the difference was increased to 1.6 to 2.0 times around 64 days after transplanting. Under the twice irrigation a day, plant height, root length, stem diameter, root diameter, number of leaf, fresh plant weight, dry plant weight, fresh root weight, dry root weight were 1.6 to 2.0, 1.1, 1.2 to 1.6, 1.3 to 1.8, 1.9 to 2.7, 1.7 to 8.0, 1.6 to 2.8,2.0 to 3.0, 1.6 to 2.7 times as high as those under the other irrigation regimes, respectively.

• 한국작물학회지
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• 제7권1호
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• pp.133-137
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• 1969

This experiment was conducted to determine the optimum row width and plant spacing within row under the tropical environment for a leading soybean variety Palmetto and it was carried out at Eakmat Experiment Station in Vietnam. The experiments were arranged in a split plot design with four replications and the test was repeated twice in two years. Variations for seed yield due to the distance between rows were significant at 1 per cent level in 1967 test(dry season growing) and at 5 per cent level in 1968 test. Significant differences for plant height, lodging, maturity, number of branches per plant, and number of pods per plant due to the row width were not found in both tests, while significant differences in difference spacing within row was found in all traits studied. Interaction between width of row and spacing within row for seed yield and plant height were found at five percent level in 1967 test. These results indicate that close planting may increase in seed yield and plant height in both seasons, and decrease in loadging. From these studies, one could be understood that the plant population, particularly in dry season, plays decisive roles on seed yield in soybean culture, and the maximum plant height and minimum value of lodging index were also observed in closest spacing plots. The highest soybean yield in late planting would be expected by a combinations of 30 cm(between rows)${\times}$5cm(between hills) plot, while 40cm ${\times}$ 5cm planting method would be suggested for rainy season growing. Highest seed yield was obtained at closet spacing in both dry and rainy season, and these results led to drilling method in seeding where about 20 seeds per meter of row could be recommended. Besides the seed yield, the close planting may produce some advantages, such as increase plant height and decrease lodging, weeds and erosion of surface soil.

• 한국초지조사료학회지
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• 제16권1호
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• pp.53-60
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• 1996

A field experiment was carried out to determine the effects of grazing stage and intensity on the forage production and nutritive value in orchardgrass dominant pasture, 1989 and 1990. The grazing stages were 20- 25m, 30-35cm and 40-45cm of plant height, and high and medium grazing intensity were set by the number of growing cows (initial body weight: 230-250kg), which was adJusted according to the pasture production. The high level of grazing intensity was 150% of medium intensity. Annual grazing frequency was 10 times in 20-25cm. 8 times in 30-35cm. and 6 times in 40-45cm of plant height. Dry matter(DM) yield was increased with increasing of plant height at grazing : 7,090kg in 20-25cm 7,882kg in 30-35n and 8,260 kgha in 40-45cm of height. Higher DM was observed at medium grazing intensity. In spring, daily DM production was more vigorous than those in summer and autumn season. Cmde protein (CP), digestible DM, and DM intake were decreased with increasing of plant height at grazing. CP content was 25.8% in 20-25cm 22.4% in 30-35m and 19.2% in 40-45cm, while the contents of neutral detergent fiber and acid detergent fiber were increased with higher plant height. Relative feed value was 11 1.2 in 20-25cm, 104.4 in 30-35n and 99.6 in 40-45cm. Also nutritive value of pre-grazing pasture plants was remarkably higher than that of post-grazing, and not significant differences of nutritive value were found between grazing intensity. From the above mults, it may be concluded that optimum plant height for grazing was 20-25cm and 30- 35cm in pasture mixtures dominated by orchardgms, and medium grazing intensity was very desirable for pasture productivity.

• 한국초지조사료학회지
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• 제17권3호
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• pp.305-314
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• 1997

Nineteen clones of Jerusalem Artichoke (JA) from several countries were collected through the series of experiments about JA started in 1979. Collected clones were screened for adaptibility in Korea and showed introduction path way. The results about an ecological response of collected clones including flowering, tuberization, biomass production, sugar contents and grouping of collected clones for use of genetic material were as follows; 1. Nineteen clones collected were ffom Korea(2), Japan(l), USA(Z), Canada(2), France(4), Germany(7), and USSR(1). 2. Through the characteristics of top collected clones were divided to the types of branch-non branch, short and long plant height, and early and late maturity. Tuber characteristics were mainly grouped to the types of white skin color-violet skin color, clusters-single unit, round-elongate, and knotty-smooth. 3. Total sugar yields 6-om top at flowering time were 490 - 630kgl10a and 6-om the tuber were 420 -490 kg/ IOa through the high yielding clones. The top-high yielding clones were Mammoth French White, Fuseau 60, Nahodka, and JA3. The higher tuber yields were got from the clones of D- 19, Colombia, Bianka and Mammoth French White. 4. Collected clones were grouped to three and first group was characterized to early maturity and short plant height and second group to medium and finally, third group to late maturity and high plant height. 5. High yielding of top was 6-om the I group of early maturity and short plant height and high yielding of tuber h m III group of late maturity and high plant height.

• 한국연초학회지
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• 제4권1호
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• pp.15-20
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• 1982

This experiment was carried out to investigate the degrees and directions of dominance, and gene distributions by analysing diallel crosses of oriental varieties. The analysis of Wr-Vr indicated non-allelic gene interaction for days to (lowering and number of leaves. Five Plant characteristics showed different degrees of dominance : incomplete dominance for Plant height and leaf shape, over dominance for , wield and sugar, and complete dominance for nicotine. It was shown that additive genetic variance was predominant for plant height, leaf shape, and total sugar. More number of dominant genes were present in Kavala and canthi for Plant height; Basma, Samsun and Izmir for leaf shape ; and Basma and Samsun (or nicotine. Their directions of dominance were tall height, narrow leaves, and low nicotine, respectively.

• Plant Resources
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• 제7권1호
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• pp.15-21
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• 2004

This study was conducted to evaluate the effect of mecoprop-wp concentrations on weed control, growth characters and yield in flax, after 7cm and 14cm of plant height it to the field. The major weeds were Alopecurus aequalis var. a murensis (kom) ohwi, Persicaria hydropiper spach, Lamium amplexicaule L, Stellaria alsine Grimm var. undulata ohwi, Eleusine indica(L.) Gaertn. Flax yield were increased somewhat more with 250g/10a mecoprop-wp at 7cm of plant height than the other treatment and by hand weeding treatment of mecoprop-wp, 250g/10a at 7cm of plant height was slightly harmful for the flax with recommended concentration, On the other hand, all treatments were harmful in the double dosage level.

• 한국자원식물학회지
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• 제11권3호
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• pp.264-271
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• 1998

This study was conducted to investigate morphological characteristics of Korean local garlic varieties and to define the genetic variability and the correlations amongthe characters associated with yield. The plant height, the leaf sheath diameter, the nubmer of leaves, and bulb weight were significantly increased in the garlic plants from heavier seed bulbs. The proportation of six clove bulbs was more than 60% in Seosan variety and this was not realted with the number of cloves in seed bulb. While more than 70% bulbs in Jeoksung and Danyang varieties cultivated in paddy field were composed of 6 or 7 cloves, majority of the bulbs of Euisung and Danyang varieties cultivated in upland were composed of bulbs with 7 cloves or more. The highest genotypic coefficient of variation (GCV) and phenotypic coefficient of variation (PCV) were observed in bulb weight. GCV and PCV also showed high value in leaf sheath diameter. Thus, there is a greater scope for selection of these characters. The small difference between PCV and GCV values in plant height indicates that the environmental influence would be limited in this character. High heritability was observed of plant height (56.76%) and bulb weight (45.95%). And the weight per bulb (34.24%) exhibited highest genitic advance followed by leaf sheath diameter (18.8%) and plant height (9.61%), and those would be the ideal characters for selelction.

• 한국작물학회지
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• 제39권3호
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• pp.232-236
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• 1994

보리 4품종, 밀 4품종, 호밀 3품종, 옥수수 1품종을 가지고 파종 심도를 달리 하였을 때 이들 작물들의 초엽장과 식물체장을 조사하였고 또 이들 간의 상관을 조사한 결과를 요약하면 다음과 같다. 1. 보리, 밀, 호밀, 옥수수가 발아할 때 생기는 관 아래의 절간을 중경 또는 지하경 이라고 호칭하고 있는데 지하경으로 부르는 것이 옳을 것 같으며 보리, 밀, 호밀은 초엽이 종자로부터 지하경과 함께 나오고 옥수수는 지하경 정단의 관에서 나오는 것을 확실하게 해두는 것이 좋을 것 같다. 2. 보리의 초엽의 길이는 파종 심도가 깊어질수록 현저하게 길어지고 식물체장도 같은 경향이 있는데 보리의 2cm파종은 6cm, 10cm깊이 파종 보다 현저하게 짧게 나타났다. 품종간에는 차이를 볼 수 없었다. 3. 밀의 초엽 길이도 마찬가지로 파종 심도에 따라 현저하게 길어졌으며 2cm 파종은 6cm, 10cm 파종보다 현저하게 짧게 나타났으나 보리보다는 못하였다. 이것도 품종간 차이는 별로 나타나지 않았다. 4. 호밀과 옥수수도 파종 심도가 깊어질수록 초엽이 길어졌으며 그 변이가 보리와 밀보다 크게 나타났다. 호밀과 옥수수에서 변이가 컸다. 5. 각 작물과 품종들에 있어서 초엽과 식물체장 간에 유의성이 있는 상관을 보였고 칠보 호밀은 고도의 유의성을 나타내었다.

• 한국작물학회지
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• 제26권4호
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• pp.357-362
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• 1981

홍화증수를 위한 알맞는 재식밀도를 구명하고 그에 따를 수량 및 농업 형질의 변이를 조사하기 위하여 1980년 3월부터 10월30일까지 강원도 원주상지대학 실습포장에서 실험을 실시하여 얻은 결과를 요약하면 다음과 같다. 1. 초장은 휴폭과 주간이 좁을수록 커지는 것으로 나타났으며 이들 양자에 의해 영향을 받았다. 2. 주당 분지수는 휴폭과 주간이 좁아짐에 따라 감소하였으며 이를 양요인에 의해 영향을 받았다. 3. 지표면에서 제1분지까지의 높이는 주간에 의해 영향을 받으며, 좁을수록 그 위치가 높아졌다. 4. 초장은 휴폭과 부의 상관을 가지며, 초장과 제1분지까지의 높이는 휴폭x주간과 부상관을 갖는다. 또한 주당 분지수는 휴폭, 휴폭x주간과는 정상관, 초장과는 부상관을 보였다. 5. 수량은 주간, 휴폭x주간에 관하여 부상관을 가지며 제 1분지의 높이와는 정상관을 가졌다. 6. 수량은 주간에 의해 크게 영향을 받으며 다음은 주간xs휴폭이 영향하는 것으로 나타났다. 휴폭은 수량에 크게 영향하지 않으나 30cm 또는 40cm구가 가장 증수되었으며 주간은 5cm구가 가장 증수되어 30cm x 5cm구, 또는 40cm x 5cm구가 홍화의 증수를 위한 적철한 재식밀도인 것으로 나타났다.

• 농업과학연구
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• 제24권1호
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• pp.6-10
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• 1997

초장, 엽수, 경수, 경직경, 엽장, 엽폭, 근경생산량을 평가하기위하여 수집 한 94 clone은 경수와 근경생산량에서 유용한 변이를 보여주었다. 초장, 엽수, 엽장, 엽폭, 경직경은 약간의 변이가 관찰되었다. 작물학적 특성간의 단순상관은 근경생산량과 정의 상관을 보여주었고 엽수, 초장, 경직경은 근경생산량과 고도의 정의 상관을 보여주었다. 경로계수분석을 통하여 경수, 엽수, 경직경순으로 근경생산에 직접효과를 준다는 결과를 얻을 수 있었다. 엽수를 통한 초장의 간접효과가 가장 크게 나타났고, 엽수를 통한 엽장, 엽폭과 경직경을 통한 초장, 엽장, 엽폭에서도 간접효과가 관찰되었다. 선발의 관점에서 볼 때, 초장, 엽수, 경수와 같은 특성들은 좋은 유전형을 선발하기에 적합하다고 여겨진다.