• 한국작물학회지
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• 제66권4호
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• pp.375-382
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• 2021

For stable cultivation in double cropping, it is important to use potato (Solanum tuberosum L.) cultivars with a short dormancy period of 50-70 days and plant seed tubers of appropriate type and size. An experiment was conducted during 2018-2019 to investigate the effects of seed tuber type and size on growth and yield performance in double cropping. Whole tubers of three sizes (10-20 g, 30-40 g, and 50-60 g) and conventional cut tubers weighing 30-40 g from three cultivars with different dormancy periods, namely 'Daeji' (40-60 days), 'Eunsun' (50-60 days), and 'Saebong' (50-80 days), were planted, and their field performance was compared. Regardless of the cultivar, the increase in the whole tuber weight up to 30-40 g led to fast emergence, thereby increasing ground cover rate, shoot growth rate, and tuber growth rate, which ultimately improved tuber yield by 33-54%. Comparing the whole and cut tubers, 'Daeji' and 'Eunsun' showed similar growth and yield performance; as such, the performance of whole tubers weighing 10-20 g was comparable to that of cut tubers weighing 30-40 g. However, 'Saebong', a cultivar with relatively long dormancy period, performed better with cut tuber than with whole tubers. Based on these results, we recommend the use of whole tubers weighing over 30 g for double cropping. Further studies to break tuber dormancy are warranted in cultivars with relatively long dormancy periods (50-80 days), such as 'Saebong'.

• 한국작물학회지
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• 제22권1호
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• pp.35-40
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• 1977

유채 추묘춘식의 파종시기와 정식기 이동이 수량형질에 미치는 영향을 구명코저 목포에서는 유달, Asahi, Miyuki의 3품종을 가지고 9월20일, 9월30일, 10월10일, 10월20일에 파종하여 익년 3월에 춘식하였고 충남에서는 유달로 상기와 같은 묘상기간동안 12.1～2.28 Vinyl과 11.1～2.28 Vinyl 처리로 시험을 실시하였던바 유묘의 생육은 목포의 파종기가 늦을수록 초장이 짧고 엽수가 적으며 생체중이 가벼운데 대해 충남은 Vinyl 피복처리에 의한 영향으로 정반대의 경향을 나타냈다. 이와같은 경향은 본포의 초장, 추태, 개화등 숙기에서도 같았다. 주요 수량 구성형질인 분지수, 1수협수, 수장, 1협결실수에서도 파종기가 늦을수록 적고 조기 파종일수록 많았는데 다만 추묘춘식에서 10월10일 이전의 파종기에서는 도장으로 인한 영향때문에 오히려 10월20일 파종보다 적고 짧았다. 종실수량에서는 목포에서 9월20일, 충남에서 9월30일 파종구가 가장 수량이 높았다. 또한 상관에서도 1차분지수, 1수협수, 결실비율과 수량 간에는 고도의 정상관이었다. 따라서 유엽 추묘춘식의 파종적기는 목포에서는 9월20일, 충남에서는 9월30일에 파종하는 것이 효과적이라고 사료된다.

• 한국초지조사료학회지
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• 제20권2호
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• pp.91-96
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• 2000

This research was concluded under dryland condition in Thrace region in 1994-1995 growing season. This experiment was arranged in randomised block design with three replications. Yield and some important yield components (plant height, number of pods per plant, number of seeds per pod and 1000 seed weight) were determined. According to the results, it can be concluded that the best sowing rate and row distance of chickling vetch for the region are $100\;seed/\textrm{m}^2$ and 20 cm, respectively.

• 한국자원식물학회지
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• 제19권6호
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• pp.697-699
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• 2006

To find out the best complex fertilizer for high yielding of rapeseed crop, experiment was conducted on complex fertilizers at the experiment field in upland of rapeseed in Mokpo Experiment Station, Nat'l Institute of Corp Science, RDA, Korea. Experiment was laid out in randomized complete block (RCBD) design. The effects of complex fertilizer (22-22-11) on the number of branches, pod length, percentage of seed set and seed yield were highest but on the plant height, ear length, and number of pods per ear were negligible. On th basis of the results reported above, for getting higher yield of rapeseed crop, among the tested fertilizers complex fertilizer (22-22-11) gave the superior performance and is recommended for application.

• 한국자원식물학회지
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• 제26권6호
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• pp.695-700
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• 2013

Flax (Linum usitatissimum L.) has been used for the only edible oil in Korea. We carried out the field experiment in order to investigate the possibly combined effects of mepiquat chloride (MC) and trinexapac-ethyl (TE) on oil composition, lignan content, seed yield and endogenous gibberellins content of flax cultivar. Plant growth retardants mepiquat chloride (300 and 600 ppm) and trinexapac-ethyl (100, 200 and 300 ppm) were foliar-sprayed to flax plant at 50days after seeding. The plant height was decreased in the combination of mepiquat chloride 600 ppm with trinexapac-ethyl 100, 200 and 300 ppm. Mepiquat chloride treatment combined with trinexapac-ethyl observed the highest response on seed yield, followed by mepiquat chloride 300 ppm with trinexapac-ethyl 100 ppm, mepiquat chloride 300 ppm with trinexapac-ethyl 200 ppm and mepiquat chloride 300 ppm with trinexapac-ethyl 300 ppm. Lignan content was increased in all of the combination treatments. It concludes that the combination of mepiquat chloride 300 ppm with trinexapac-ethyl 300 ppm will be useful to increasing oil and lignan content in flax plants.

• 한국작물학회지
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• 제48권5호
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• pp.376-380
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• 2003

In order to examine the possibility that oil seed rape could be used as a forage fodder crop and to select the most suitable variety of forage rape at the southern area of Korea, two varieties of oil seed rape currently grown for oil production and six introduced varieties of forage rape with relatively high yield and high nutritional value were grown at the same condition their and yield components were observed. Forage rape was superior to oil seed rape in terms of yield components, plant fresh weight and plant dry mater weight. Velox was superior to any other variety of forage rape in these characters. When plant dry matter weight of the rape was subdivided into four components such as a main stem, branch stems, main stem leaves and branch leaves, contribution of these components to plant dry matter weight was in the order of branch stems, branch leaves, the main stem and main stem leaves. Dry matter percentage of the rape ranged from 9.32 to 11.08 percent, which was somewhat low value. There was no significant difference between two groups of the rape in terms of dry matter percentage. Velox showed somewhat higher value in dry matter percentage.

• 한국잡초학회지
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• 제7권1호
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• pp.52-57
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• 1987

To know the effects of weeding periods (weeding from 12 days, 28 days and 42 days after seeding to harvest, and weeding from seeding to 14 days, 28 days and 42 days after seeding) and growing conditions such as transparent polyethylene film mulch (P.E. mulch) and bare soil on growth and yield of peanuts, "Yeongho-Tangkong" was planted on May 10, 1984. Under P.E. mulch, the number of weeds was higher, but the weed dry weight was lower than in bare soil by the middle of July. Sixty days after seedings, the length of main stems in weedy check plots was longer, but shoot dry weight was lower compared to weed free plot. In the correlation coefficients between weed dry weight and the shoot dry weight of peanut on July 14, the growth retardation of peanuts due to weeds was showed earlier under P.E. mulch than in bare soil. Shoot dry weight, shelling ratio, number of seeds per pod, 100 pod weight, and seed yield were higher under P.E, mulch compared to bare soil. But weed dry weight, length of branches, number of pod bearing branches, number of pods per square meters, and pod yield were similar between P.E. mulch and bare soil. Shoot dry weight of peanuts, length of branches, number of pod bearing branches, number of pods per square meters, pod yield, 100 pod weight, 100 seed weight, and seed yield in weed free plots from 28 days after seeding to harvest (28 DAS-Harvest) were higher compared to weed free plots from 42 DAS-Harvest. However, in the weed free plot from seeding to 42 days after seeding seed yield was lower than that of the continuous weeding plot due to lower number of pod bearing branches and number of pods per square meters. When weed was not controlled at the later growth stages of peanuts, reduction in seed yield due to weeds was greater in bare soil than that under P.E. mulch.

• The Plant Pathology Journal
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• 제18권2호
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• pp.68-73
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• 2002

The influence of fungicidal spray was assessed on powdery mildew epidemics caused by Erysiphe polygoni D.C. and on yield-attributing characters of mungbean [Vigna radiata (L.) Wilczek]. Mildew attack adversely affected the yield-attributing characters of mungbean and exhibited negative significant correlation with pod length (-0.57), pods/plant (-0.74), pod weight (-0.68), 100 seeds weight (-0.69), 100 seeds swell weight (-0.59), and seed germination (-0.71). These characters had direct or indirect effects on grain yield, which was also adversely affected due to mildew attack (-0.89). Powdery mildew was significantly retarded due to the single spray of carbendazim (0.05%) at 30-day-old crop, where the apparent rate of infection (r) was minimum at 0.0095/ unit/day and with low (11.44%) powdery mildew intensity. Other fungicides like tridemorph (0.075%) and penconazole (0.05%) were equally effective against the mildew disease where the disease intensity was less than 20% and the values of r were 0.0134 and 0.039/unit/day respectively, as compared with the control at 0.267/unit/day. Fungicide spray influenced the yield-attributing characters besides controlling the disease. Such effects were more pronounced in carbendazim (0.05%)-treated plots due to its phytotonic nature where pod length (7.59cm), pods/plant (29.75), pod weight (8.16 g), 100 grain weight (3.94 g), and swell weight of 100 seed (9.49 g) were maximum resulting to the highest yield (480 kg/ha) as compared with that of control (224 kg/ha). Spray of carbendazim also improved seed germination (74.5%). Spray of other fungicides like carbendazim with copper oxychloride in 1:1 ratio, tridemorph (0.075%), and penconazole (0.05%) was equally effective against powdery mildew of mungbean. These fungicides also exhibited positive effects on yield-attributing characters of the crop and finally increased yield. These systemic fungicides were more effective in controlling powdery mildew disease of V. radiata in the rainy season compared with wettable sulphur.

• 한국초지조사료학회지
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• 제37권1호
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• pp.50-55
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• 2017

In attempt to avoid crop damage through wild bird's picking, this study was designed with aim to evaluate several pre-sowing soybean seed coatings for optimum yield in corn-soybean mixed forage. It was investigated under four cropping treatments, viz. 1) corn sole, 2) corn mixed with soybean without any coating, 3) corn with iron coated soybean and 4) corn with thiram coated soybean. Each treatment had three replicates and corn sole was control treatment. Pioneer (P1184) and crossbred ($PI483463{\times}Hutcheson$) seeds were used for corn and soybean, respectively. The trial was conducted under randomized block design from $5^{th}$ June to $23^{rd}$ September, 2015. Data were an alyzed through ANOVA technique using SAS9.1.3 software. Results depicted that survivability of soybean against wild birds damage was found better (p<0.05) in thiram coating which was higher than iron coating and control treatment but later on thiram coating had adverse effects on subsequent growth of soybean plants. Corn stalk height was decreased (p<0.05) in thiram coating, whereas corn ear height was reduced in iron coating treatment. Iron coating enhanced (p<0.05) height of soybean plant (p<0.05) better than that of thiram coating. Soybean seed coatings didn't influence dry matter yield and nutritive value in terms of total digestible nutrients yield in corn soybean mixed forage. Conclusively, although presowing thiram coating enhanced survivability of soybean plants against wild bird damage but had adverse effects on its subsequent growth. However, soybean seed coatings didn't influence yield and nutritive value of corn soybean intercropping forage.

• 한국작물학회지
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• 제46권6호
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• pp.483-487
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• 2001

검정콩의 2립과 3립협의 비율 및 결협율 향상에 의한 수량 증대를 위하여 TIBA 및 Ethrel 의 적정 처리시기 및 농도를 구명하기 위한 시험을 요약하면 다음과 같다. 1. TIBA 처리에서 공협과 1립협의 비율을 낮추고, 2립과 3립협의 비율을 높이기 위한 가장 효과적인 처리시기는 V6이었고, 처리농도는 50 ppm이었다. 2. 에스렐 처리에서 공협과 1립협의 비율을 낮추고, 2립과 3립협의 비율을 높이기 위한 가장 효과적인 처리시기는 V6이었고, 처리농도는 500 ppm이었다. 3. TIBA처리에서 결협율을 향상시키기 위한 처리방법은 처리기에 관계없이 50 ppm처리에서 가장 효과적이었고, V6 및 V8에 150 ppm처리에서는 오히려 낮아졌다. 4. 에스렐 처리에서 무처리에 비하여 결협율이 향상된 처리는 없었고, 처리간에는 처리시기가 빠르고 처리농도가 낮아짐에 따라 높아지는 경향이었다. 5. TIBA처리에서 수량은 공협 및 1립협 비율의 감소, 2립협 및 3립협의 증가 및 결협율의 향상에 의하여 처리시기에 관계없이 처리농도 50 ppm에서 증대되었다. 6. 에스렐 처리에서 수량은 결협율의 감소에도 불구하고 공협 및 1립협 비율의 감소와 2립협 및 3립협의 증가에 의하여 처리시기에 관계없이 처리농도 500 ppm에서 높았다.