• KOREAN JOURNAL OF CROP SCIENCE
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• v.68 no.1
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• pp.8-19
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• 2023

Adzuki beans have gained popularity in recent years due to their health benefits. Breeding of Adzuki beans is less favorable than with other legumes due to low genetic diversity. This study aimed to evaluate the genetic diversity of 252 adzuki bean germplasms from China, Japan, and Korea using 18 agro-morphological parameters and comparing their performance to three prominent Korean cultivars: Geomguseul, Arari, and Chungjupat. Leaf shape, pod color, and seed coat color were among the qualitative traits that showed wide variations. The quantitative variables also showed wide variations among adzuki bean germplasms. Although there was no significant difference (p < 0.05), the average rate of germination declined in the order of Korean (91.44%) > Chinese (91.31%) > Japanese (87.47%) adzuki beans. Chinese adzuki beans needed fewer days to flower (DF, 58.22 days) and days to mature (DM, 107.13 days), which varied significantly compared to the Korean and Japanese adzuki beans (p < 0.05). The average number of pods per plant (PPP) and one-hundred seeds weight (HSW) were higher in Japanese adzuki beans compared to the Korean and Chinese adzuki beans although the variation of each was not significant. Almost 29.76% of the accessions had early-blooming flowers, 3.97% were premature, 21.43% produced more PPP, and 3.97% yielded more SPP compared to control cultivars. Results of hierarchical cluster and principal component analyses revealed three clusters with significant variation in all quantitative variables except for RG (p < 0.05). The key factors in multivariate analyses were DF, DM, and HSW. Our study investigated the genetic diversity of adzuki bean accessions and identified ten early maturing and ten high PPP-yielding accessions. Our findings would help farmers and breeders to select the top-performing accessions that can provide them with various options.

• Journal of Environmental Science International
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• v.31 no.3
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• pp.247-254
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• 2022

This study investigated the effect of vegetation mat on plant growth and salt reduction in the soil treated with high concentration deicing salt. In order to measure soil chemical characteristics and plant growth, three native groundcover plants (Dendranthema zawadskii var. latilobum, Dendranthema boreale, and Kalimeris yomena) were grown in each of the three plastic containers (50.0 cm width × 35.0 cm length × 8.5 cm deep) with a high concentration treatment of calcium chloride deicing salt. There were two treatments: control, and BVM that combines B (blanket) and VM (vegetation mat). 1,600 g of soil was placed on the top of the drainage layer with 290 g of perlite, 100 seeds each of the three native plants with three repetitions were sowed, and 10 g/L of calcium chloride deicing salt was added in the treatment. As a result of the chemical properties of soil, soil in control treatment was acidic and soil electrical conductivity in BVM was the lowest. Also, exchangeable cations (K⁺, Ca²⁺, Na⁺, and Mg²⁺) in soil and all the three plants were significantly decreased in the BVM treatment. Meanwhile, the germination rate of Dendranthema zawadskii var. latilobum was the highest under high concentration deicing salt in compared to the two plants. Overall, three native groundcover plant growth was higher in the BVM than control treatment significantly. These results suggest that the treatment of blanket vegetation mat has a positive effect on soil and plant growth in soil damaged by deicing salt.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.167-167
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• 2022

Seed production of italian ryegrass has a problem of lodging during ripening and a decrease in quality due to difficulty in drying seeds during harvest. Therefore, in order to produce high-quality Italian ryegrass in paddy fields, it was carried out to reduce the density and solve the lodging problem through transplanting. In this experiment, Lolium multiflorum cv. Kowinearly was transplanted in autumn from a paddy field in Sindong-ri, Gwansan-eup, Jangheung-gun, Jeollanam-do. var. Kowinearly was made into a bed at 90 g/box and stacked in boxes. It was transplanted on October 27th after 2 days of germination at 30℃ and 15 days of seedling and greening. When transplanting, they were transplanted at intervals of 30×14cm. The existing cultivation method, drill seedling, was sowed at a level of 50 kg/ha, and both transplanting and drilling were carried out at a nitrogen fertilization rate of 45 kg/ha. The number of ears during transplant cultivation was 1,016/m² and the drilling tended to be higher at 2,278/m², but this was probably due to the difference in seeding amount. The seed number of an ear tended to be 56% higher in transplantation, which had a significant impact on yield. The seed yield was 2,096 ka/ha in transplantation, which was 21% higher than that of drilling. When looking at the relationship with weed occurrence, there were areas where all the weeds, such as amul foxtail, occurred due to the low density. Even in the same transplanting area, the seed yield was about 1,000kg/ha less in the area where the weeds were abundant. It seems that weed management is important in paddy cultivation. Therefore, it seems necessary to develop an exclusive herbicide for Italian ryegrass cultivation.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.24-24
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• 2023

본 실험은 한반도 극지 고산식물인 진퍼리꽃나무[Chamaedaphne calyculata (L.) Moench] 종자의 형태적 특성을 조사하고 변온조건과 저온처리 및 GA3 처리가 발아에 미치는 영향을 구명하고자 수행하였다. 진퍼리꽃나무 종자는 국립수목원 전시원에서 채종 후 4℃에 저온건조 저장하였으며 전자현미경(DVM6, Leica Microsystems GmbH, Wetzlar, Germany)을 이용하여 종자와 배의 길이를 측정하였다. 2022년 3월에 growth chamber 내에서 32일간 15/6℃, 25/15℃ 변온조건하에 배양하였으며, 저온층적처리(0, 40일) 및 GA3 처리(0/500/1,000mg·L^-1) 처리에 따른 발아 특성을 구명하였다. 진퍼리꽃나무 종자의 최종발아율(FGP)은 25/15℃ GA3 1000mg·L^-1 처리에서 42.2%로 가장 높게 조사되었다. 평균발아일수(MGT)는 15/6℃ 저온층적 처리에서 22.3일로 가장 높았으며, 대부분 15/6℃ 변온조건에서 25/15℃ 변온조건보다 6∼8일 높았다. 최종발아일의 평균은 약 12일로 확인되었다. 저온 층적처리 결과, 최종발아율(FGP)은 온도조건 25/15℃, 15/6℃에서 각각 32.2%와 11.1%를 보여 무처리구에서 조사된 24.4%와 10.0%보다 각각 7.8%, 1.1% 높게 나타났다. 호르몬처리 결과, 동일한 발아조건에서 GA3 500mg·L^-1 처리보다 1000mg·L^-1 처리에서 더 높은 발아율을 보였다. GA3 1000mg·L^-1 처리에서의 최종발아율(FGP)DKSH은 25/15℃, 15/6℃ 각각 42.2%와 30.0%를 보여 무처리구 보다 각각 17.8%, 20% 높게 나타났다.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.39-39
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• 2022

기온, 강수량 등 기후변화에 따른 식물 멸종이 증가함에 따라 기후변화에 민감한 북방계식물의 중요성이 증대되고 있는 실정이다. 본 연구 대상종의 큰금매화(Trollius chinensis)는 북한 및 북방계 식물로 고산 초지에서 자생하는 미나리아재비과 여러해살이풀이며, 기후변화에 직·간접적인 영향을 받고 있는 실정이다. 이에, 큰금매화의 발아조건을 규명하여 종 복원과 대량증식법 개발을 위한 기초자료를 확보하는 데 목적이 있다. 종자의 형태학적 특성은 원형~계란형(circular~obovate)에 작은 돌기가 겹겹이 있는(Colliculate) 형태였으며, 종피는 진갈색이다. 크기는 길이 1.37±0.741mm, 너비 0.81±0.531mm이었다. 종자의 단면을 확인한 결과, 배는 작은 선형태(Axial-miniature)이었으며, 종자는 91%의 충실도를 보였으며 TZ 테스트에서 모두 배가 전체적으로 붉은색으로 염색되어 양호한 활력을 보였다. 처리구별 발아실험 전 종자 소독은 파종 전 70% 에탄올 처리 후 2%의 NaOCl을 넣어 10분 동안 소독 후 멸균수로 5회 수세하고 멸균수를 제거하여 침지처리에 사용하였다. 발아실험 결과 종자의 최종발아율(FGP)은 15/6℃ GA3 1000mg·L^-1 처리에서 40.0%로 가장 높았다. 평균발아일수(MGT)는 15/6℃ 무처리에서 22.8일로 가장 높았으며, 최종발아일의 평균은 약 9.5일로 확인되었다. 대부분 GA3 처리에서 최종발아율(FGP)이 20% 이상 높게 나타났으며, GA3 500mg·L^-1 보다는 GA3 1000mg·L^-1의 조건에서 3.3~5.5% 최종발아율(FGP)이 향상된 것으로 확인되었다. 한편, 온도 조건 25/15℃ 무처리에서는 발아가 확인되지 않았다.

• Journal of Soil and Groundwater Environment
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• v.29 no.1
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• pp.51-62
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• 2024

A study was performed to investigate the positive impacts of humic substances (HS) on the growth of green barley, a type of green manure plant. The study was conducted in a pot culture using two different types of reclaimed soils that had been treated by land farming (DDC) and thermal desorption (YJ) methods, respectively. The experimental conditions consisted of three treatments: plant only (P), plant plus 2% HS, and no plant (control). After 89 days of culture in a controlled growth chamber, the growth of spring barley and activity of seven soil enzymes were measured. The results indicated that the addition of HS had a substantial (p<0.10) positive effect on shoot biomass in both types of soil. Furthermore, the addition of HS notably (p<0.05) enhanced all seven soil enzyme activities in both soils. Both the aboveground and belowground parts of barley plants were returned to soil and aged for 10 weeks in the same growth chamber, which resulted in notable enhancement in soil health indicators. These improvements included an increase in organic matter, a drop in bulk density, and an increase in the activity of seven different soil enzymes. When lentil seeds were planted in the aged soils, the development of the seedlings was more vigorous than that in the control in both soils, although allelopathy of barley suppressed lentil germination in soil with pH 7.0 but not in soil with pH 8.5.

• Journal of Bio-Environment Control
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• v.17 no.2
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• pp.116-123
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• 2008

This study was carried out to investigate into the effect of light-emitting diode (LED) for the light quality as a light source on the broccoli seed germination and the physiological activity of vegetable sprouts. We have also germinated seeds of the broccoli and applied LED as a light quality such as blue, green, red, white, yellow and red + blue color lights to their sprouts for 14 hours and kept dark for 10 hours at the temperature of $25^{\circ}C$ (day)/$18^{\circ}C$ (night). Broccoli sprouts were extracted by methanol and their physiological activities were examined. All broccoli seeds were germinated at 3 days after seeding regardless of the light color. Total sprout fresh weight were mostly became highest by 0.389g (10 plants) at 8 days after seeding when their sprouts were grown under blue color light. Total phenol compound contents in broccoli sprouts were extremely increased by $83.0\;mg{\cdot}L^{-1}$ under the white light, and total flavonoid contents were most much more by $72.6\;mg{\cdot}L^{-1}$ under the blue light. DPPH radical scavenging activity at $2,000\;mg{\cdot}L^{-1}$ were most highest by 93.5% in broccoli sprouts grown under the white light. Nitrite radical scavenging activity at the concentration of $500\;mg{\cdot}L^{-1}$ in sprout extracts were the most increased by 66.9% under the yellow light, and tyrosinase inhibition activity at $2,000\;mg{\cdot}L^{-1}$ in sprout extracts were by 14.5% under red light.

• Korean Journal of Agricultural Science
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• v.3 no.1
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• pp.67-75
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• 1976

This experiment was studies for grassland establishment on west coastal saline land in Korea from May 1975 to March 1976 and used seeds were introduced from Australia. The results of adaptability were summarized as follow. 1. The seeds germination percentage was not influence in 0.5% salt included, but delayed days in 1% salt included and decreased germination percentage. 2. Any experimental grasses species were not growth on the 0.5% salt included soil and also growth was much damaged on the 0.05% salt included soil. It was suggested that $Mg^+$, $K^+$ ions involved with $Na^+$ ion. 3. The yield of grasses were much decreased on 0.05% salt included soil which compared control group. The yield rate of decrease were 30% in kikuyu, 60% in strawberry clover, 63% in reed canarry and 89% in orchard grass. 4. For winter-hardness test, nearly all the species well overwintered but except kikyu. 5. One of salt tolerance native grass (Agrostis distans crieseb var coreensis, Hackel) was discovered in saline area, and it was growth from middle of May to Middle of September. Also it was known that the native grass was good feed stuff but it was not so long in growth life. 6. It was concluded that more experimental work must be carried out to select of salt tolerance grass for grassland establishment on saline by introduce some more species such like saltgrass, saltbush, shadsclae from foreign land.

• Korean Journal of Soil Science and Fertilizer
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• v.17 no.3
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• pp.274-282
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• 1984

In order to study the effect of seed-fertilizer vertical distance with soil moisture and fertilizer levels on the emergence and initial growth, barley cv. Olbori was seeded in the pots filled with sandy loam or loamy sand soils which were adjusted to 80-100% (higher soil moisture) or 50-60% (lower soil moisture) of soil moisture retention percent at 1/10 atmosphere tension. Prior to seeding of barley seed-fertilizer distance was appropriately controlled by adding soils after dressing fertilizer at three levels-normal application ($N:P_2O_5:K_2O=6-9-7kg/10a$), 50% increase of normal dose and double application. In addition, germination experiment was conducted in the various concentrations of fertilizer solutions under room temperature. The results are summarized as follows; 1. Seed-fertilizer vertical distance must be more than three centimeters to avoid from the decrease and retardation of emergence and poor initial growth of bareley by fertilizer application. 2. Emergence of barley more decreased and retarded in sandy soils than loamy soils and was decelerated with increase of application rate in fertilizer and decrease of soil moisture content. 3. Germination rate remarkably decrease from 0.4 percent of nitrogen solution and 0.5 percent of potassium solution and reached zero at 2.3 and 2.4 percent of nitrogen and potassium solutions, respectively. 4. Germination of seeds affected by concentrated fertilizer solutions was remarkably recovered with dilution degree of fertilizer solution.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.4
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• pp.353-364
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• 2020

Recently in Korea, soybean harvesting has been delayed due to rainfall during the harvesting season, resulting in a reduction in yield and seed quality. This study was conducted to analyze the changes in yield and seed quality during delayed harvest with rainfall treatment using different harvesting methods, including field harvesting and polyethylene film covering after cutting fully-matured soybean plants (PE covering after cutting), with two major Korean soybean cultivars (Glycine max L), Pungsannamulkong and Daewonkong. The shattering rate of Pungsannamulkong, which is higher than that of Daewonkong, increased up to 41.8% when the harvest was delayed for 40 days without rainfall treatment by harvesting with PE covering after cutting. The weight of 100 seeds tended to decrease slightly as harvesting was delayed. When Daewonkong was harvested using the PE covering after cutting method with rainfall treatment, the yield decreased to the lowest level with a 0.8 kg ha^-1 daily reduction rate. Pungsannamulkong showed the lowest yield when harvested using PE covering after cutting without rainfall treatment with a 3.4 kg ha^-1 daily reduction rate. The infected seed rate increased according to the harvest delay in both cultivars, and significant differences were observed according to rainfall treatment and harvesting method. The germination rate was maintained above 95% even after 40 days of delayed harvest if there was no rainfall treatment. However, with rainfall treatment, the germination rate was significantly lowered as harvesting time was delayed. In the field harvesting with rainfall treatment, the germination rate decreased to 77.2% for Daewonkong and 76.5% for Pungsannamulkong after 40 days of harvest delay. For the 100-seed weight, effects of individual treatments and interactions between treatments were not observed. In contrast, the effect of interactions between treatments on the shattering rate was significant in both cultivars, indicating that the shattering rate had the greatest impact on the yield changes during delayed harvest.