• 원예과학기술지
• /
• 제28권5호
• /
• pp.902-911
• /
• 2010

본 총론은 주로 더운 여름에 집중 출하되고 있는 국내 참외에 대한 소비 판매 증대를 위한 품질개선을 위한 수확 후 관리 기술 및 포장재 적용 현황을 고찰하였다. 최근 재배 생산, 유통, 판매 측면에서 고품질 참외 상품화를 위한 수확 후 선별, 예냉, 저장, 유통, 포장 등 다양한 전처리 과정을 통한 과실 품질의 많은 향상을 보이고 있다. 참외 저장은 품종에 따라 다르겠지만 일반적으로 90-95% 상대습도에 7-$10^{\circ}C$ 온도의 저온 조건이 적당하며, 수확된 참외의 고품질 유지를 위하여 저온 장해를 받는 온도 조건에서 보관해서는 안 된다. 수확 후 에틸렌의 발생을 억제를 위한 1-MCP 처리, 활성물질을 가지는 기능성 포장재, 참외의 호흡률을 고려한 CA저장 및 MA 포장은 2-3% 산소 및 5-10% 이산화탄소 조건이 참외의 적정 저장 조건으로 볼 수 있다. 이러한 수확 후 관리 처리 기술의 적용 등은 참외 품질 유지와 저장 기간을 늘일 수 있을 것으로 기대되며, 특히 유통 및 저장에서 취급 중 발생할 수 있는 상품성 저하에 대해 효과적이며 안정적으로 적용할 수 있다. 현재 고품질 참외 제품에 대한 다양한 첨단 선도유지 처리 기술이 연구 진행되고 있지만 품종, 수확시기, 그리고 판매 환경조건 등을 고려한 연구가 필요하며, 국내 참외의 국제 경쟁력을 가지기 위하여 해외 제품과의 브랜드 차별화를 위한 전략적인 연구가 지속적으로 필요하다고 판단된다.

• 원예과학기술지
• /
• 제30권3호
• /
• pp.256-260
• /
• 2012

본 연구는 ABA 처리를 통해 '홍이슬' 포도의 착색을 증진시키고자 하였으며 고품질 과실을 생산할 수 있는 적정 수확시기를 밝히고자 하였다. 변색 초기에 $1000mg{\cdot}L^{-1}$ 의 외생ABA 처리는 내생 ABA와 당함량 증가를 가져왔으며 착색증진에 효과가 있는 것으로 조사되었다. ABA 처리 시 착색이 촉진되어 처리 후 15일인 만개 후 85일부터는 수확이 가능한 정도까지 착색되었으며 이후에도 계속적으로 안토시아닌 함량이 증가하였다. 과립성숙에 따른 가용성고형물의 증가와 산의 감소도 꾸준히 진행되었다. 만개 후 100일 이후에는 당도가 높고 산도는 낮은 수준으로 변화가 없으나 경도가 급격히 감소하였다. 따라서 지연 수확 시 과숙의 위험이 있어 과실의 상품성을 높이기 위해서는 만개 후 100일을 전후하여 수확하는 것이 바람직할 것으로 생각된다. 반면 무처리구의 경우에는 착색이 불량하여 만개 후 85일에는 수확이 불가능하였다. 만개 후 100일에도 당산비를 기준으로 한 수확은 가능하였으나 여전히 착색이 불량하였다. 착색을 기준으로는 만개 후 110일에서야 수확이 가능하였으나 과숙과 동시에 경도가 현저하게 낮았다. 따라서 무처리구의 경우 만개 후 100일을 기준으로 착색을 증진시키는 방법이 요구되었다.

• 한국산림과학회지
• /
• 제106권1호
• /
• pp.1-9
• /
• 2017

산림 벌채 후 형성되는 가장자리 효과의 발생 여부과 회복 과정을 이해하는 것은 생태계 천이와 경관 및 서식지의 공간 영향을 분석하고 이해하는 필수 요소임에도 불구하고, 우리나라에서 관련 주제의 실증 연구는 찾아보기 어렵다. 본 연구는 강원 남부 지역의 소나무림 벌채 후 1, 3, 10, 16년이 경과한 장소에 형성된 벌채지 및 임내 가장자리에서 비생물 및 생물 요인의 변화 양상을 선 (20개) 및 방형구 (340개) 조사법을 병용하여 조사하였다. 벌채 후 초기(3년 이내)는 가장 자리에서 인접 숲 내부 방향으로, 15m 깊이까지 식생 피도, 풍부도, 수관 열림도, 그리고 대기 온도 및 습도가 급격하게 변화하였다. 가장자리 형성 이후, 비생물 요인 및 식물 풍부도의 안정화는 각각 10년 및 16년이 소요되었다. 교목종이 초본식물에 비하여 가장자리 환경에서 더 높은 증가 양상을 나타내었고, 교목종의 높은 증가는 하층식생의 동태에 영향을 주었다. 본 연구 결과를 통해 벌채에 의한 직 간접적인 서식지 변화는 최소 인접 산림의 15 m에서 20 m까지, 그리고 16년 수준까지 지속적으로 영향을 미치는 것으로 나타났다. 본 연구 결과는 경관 및 서식지 패치 평가에 필수적인 가장자리 효과의 깊이에 대한 첫 국내 첫 실증 연구자료로 친환경벌채 기준제시 등 활용성이 높다.

• 한국작물학회지
• /
• 제53권1호
• /
• pp.34-41
• /
• 2008

건강 기능성 농산물로 주목을 받고 있는 검정콩의 isoflavone과 soyasaponin ${\alpha}g$와 ${\beta}g$의 축적 추이를 검토하였다. 또한 이들 항산화 성분을 고함유한 고 기능성 검정콩 생산을 위한 재배기술 확립에 기여하고자 하였다. 얻어진 결과는 다음과 같다. 1. 검정콩의 등숙기간 중 항산화 성분인 isoflavone과 soyasaponin ${\alpha}g$와 ${\beta}g$의 함량은 대체로 수확기$(R_8)\;6{\sim}7$일전에 가장 높았다. 이는 고항산화 콩을 생산하려면 수량 중심의 수확시기보다 $3{\sim}7$일 정도 빨라야 함을 의미한다. 2. 검정콩 종실의 등숙기간 중 총 isoflavone 함량은 일품 검정콩은 개화 후 61일, 흑청콩은 개화 후 77일에 가장 높았다. 검정콩 종실의 soyasaponin ${\alpha}g$와 ${\beta}g$의 함량은 일품 검정콩은 개화 후 61일에, 흑청콩은 개화 후 71일에 가장 높았다. 3. 검정콩 잎의 등숙기간 중 총 isoflavone함량은 일품검정콩과 흑청콩 모두 개화 후 55일에 가장 높았다. 검정콩 잎의 soyasaponin ${\alpha}g$의 함량은 일품검정콩은 개화 후 $18{\sim}41$일, 흑청콩은 개화 후 $55{\sim}71$일에 높았다. 4. 검정콩 잎의 생리활성 성분 함량이 높은 것으로 보아 이를 신소재 기능성 농산물로 활용 및 개발할 수 있을 것으로 사료되었다. 검정콩 잎을 신소재 기능성 농산물로 활용하기 위한 수확적기는 종실비대가 완료되는 생리적성숙기($R_7$)이었다.

• 한국농촌건축학회논문집
• /
• 제24권4호
• /
• pp.17-24
• /
• 2022

This study aims to identify the Spatial Changes and the main agent of space creation in Samrye Area during the Japanese Occupation Period. As for the urban space in the Samrye area, the urban space was expanded to the Hujeong-ri area from the construction of the Jeonbuk light railway. Before 1914, the urban space of Samrye was formed around Samrye Station in Samrye-ri, which oversees Samrye-do from the Goryeo Dynasty to the Joseon Dynasty, but when Samrye Station of Jeonbuk light railway was established in Hujeong-ri in 1914, the foundation of a ladder-type street network visible from the central space of the current Samrye area was formed until the 1930s. And it was the Japanese and Korean landowners who took the lead in the construction of the Jeonbuk light railway, not the government, who expanded the urban space of Samnye from Samrye-ri to Hujeong-ri. The background of the establishment of Jeonbuk light railway is the reason why Dongsan Farm has difficulty in transporting rice to the Honam Line during the rice harvest. At that time, Park Ki-soon, famous as the land king, took charge of the established chairman of the railroad installation and established it, and with the establishment of Samrye Station, the access road was connected to his farm. In addition, a new road was built on the farm land that owned the Hujeong-ri area to the Seoul-Mokpo Interroad in Samrye-ri, thereby expanding the urban space. In other words, unlike Gunsan and Iksan, which were built under the leadership of the Japanese colonial eran government, the urban space in Samrye area was expanded by a farmer who grew up as a large landowner based on agriculture, which was the economic base at the time.

• 한국작물학회지
• /
• 제47권1호
• /
• pp.68-73
• /
• 2002

High temperature during sprout emergence period of potato (Solanum tuberosum L.) is a major limitation to the yield of fall-grown potato in Korea. To explore the possibility of improving the yield of fall-grown potato through recycled paper mulching, the changes of soil environment and the growth and yield of potato cv. Daeji as affected by three mulching treatments of non-mulched control, recycled paper mulching (RPM), and black polyethylene film-mulching (BPFM) were examined over two fall seasons at Suwon, Korea. The mulching materials were a recycled mulch paper with 110 g/$m^2$ and a thickness of 0.1 mm, which was manufactured from old corrugated containers for this experiment and a commercial black polyethylene film with a thickness of 0.01mm. On an average throughout the growing period, the soil temperature with RPM at the 5-cm depth was lower by 0.4-1.1$^{\circ}C$ than that of the control. The maximum temperature during daytime in RPM was lowered by approximately 1 to 5$^{\circ}C$ according to the weather condition during emergence period, the difference being great on a fine day. The soil temperature with BPFM was much higher than the control. The effect of the mulching treatments diminished as the canopy became developed. The mulching treatments were more advantageous than the control in the conservation of soil water. Moreover, RPM and BPFM efficiently suppressed the occurrence of weeds until the potato harvest. RPM improved the emergence significantly due to lower soil temperature, whereas BPFM showed much poorer emergence than the control. Growth after emergence and yield were significantly higher in RPM than in the control and BPFM. It was concluded that the significantly improved yield in RPM compared to that in the control was mainly due to the improvement of the sprout emergence and tuber growth accompanied by lower soil temperature and better conservation of soil water.

• 한국작물학회지
• /
• 제51권1호
• /
• pp.32-40
• /
• 2006

The nitrogen (N) absorption and partition of the rice plants are important indicators that can be used to improve the N use efficiency (NUE) of the plants. Improving the plant NUE can help to avoid nutrient waste that may cause environmental pollution. To investigate the N absorption and partition of the rice plants, Hwaseongbyeo (Japonica) and Dasanbyeo (indica/japonica) were applied with N fertilizers at the rates of 60, 120, and 180 kg N per ha in paddy field. Also micro plots of $0.81m^2$ were established inside each plot for application of $^{15}N-labeled$ fertilizer. The differences in N utilization of the rice plants were associated with the total N absorption and partitioning after the heading stage. In the grain filling period, the increase of nitrogen content in the total and leaf blades of Dasanbyeo was higher than that of Hwaseongbyeo. Soil N was the main contributor for the increase of total N of Dasanbyeo during the grain filling period. The N fertilizer uptake rate of Hwaseongbyeo rapidly increased with the increment of N fertilization rate. In Dasanbyeo, N fertilizer uptakes were similar under all rates and times of N application. From heading stage to harvest, Dasanbyeo continued accumulating nitrogen, whereas Hwaseongbyeo had small changes. In conclusion, the difference in nitrogen absorption and partition after heading of the two cultivars was caused by the ability of Dasanbyeo to accumulate and remobilize soil nitrogen to the grains during the grain filling period.

• 한국초지조사료학회지
• /
• 제16권1호
• /
• pp.1-8
• /
• 1996

The objective of this study is to obtain the basic data for investigating the effects of organic reserves on winter survial or regrowth yield. Forage rape (Brussicu napus L.) was sown at 10 day> interval from Sep. I to Nov. 1. Field-grown palnts were sampled on the before wintering (Dec. 4) and on the wintering period (Jan. 16) to analyze the nitrogen and non-structural cahohydrate reserves. The rate of winter survival and regrowth yield were also measured in the spring of next year. On the before wintering, the dry matter yields from the plots sown on Sep. 1, Sep.11 and Sep. 21 were 860, 596 and 260 kg/lOa, respectively. No. harvest was canied out on the plots sown after Oct. 1 because the growth state was not enough to cut. Both of nitrogen and starch contents per plant significantly increased as the seeding date was later. On the wintering period, the contents of nitrogen reserves in roots were 176.8. 120.1, 71.7, 84.0, 72.1, 45.3 and 33.3 mg/plant, those of starch reserves were 199.0. 55.8, 21.8, 92.6, 86.5, 36.4 and 29.0 mglplant, resepctively, in the plots sown on Sep. 1, Sep. 11, Sep. 21, Oct. I, Oct. 11, Oct. 21 and Nov. 1. The rates of winter survival were 40, 36, 33, 85, 87, 59 and 49% and regrowth yields were 161, 86, 65, 520, 451, 121 and 33 kgD.M/lOa, respectively, in each plots. 'Ihese results clearly showed that seeding date has a close influence on the level of organic reserves and forage yield, and that the possibility of continuous utilization on the before and alter wintering is extremely limited by seeding date.

• 한국약용작물학회지
• /
• 제26권3호
• /
• pp.205-213
• /
• 2018

Background: Since the revised Ginseng Industrial Act was passed, ginseng sprouts have become a new medicinal vegetable for which there is high consumer demand. However, the existing amount of research and data on ginseng production has not kept pace with this changed reality. Methods and Results: In this study we analyzed the changes in the amounts of ginsenosides in different parts of growing ginseng sprouts during the period from when organic seedlings were planted in nursery soil until 8 weeks of cultivation had elapsed, which was when the leaves hardened. In the leaves, ginsenoside content increased 1.62 times with the panaxadiol (PD) system and 1.31 - 1.56 times with the panaxatriol (PT) system from 7 to 56 days after transplantation. During the same period, the total ginsenoside content of the stems decreased by 0.66 - 0.91 times, and those of the roots increased until the $21^{st}$ day, and then underwent steep declines. The effect of fermented press cake extract (FPCE) and tap water (TP) on the total amount of ginsenoside per plant were similar, and could be represented with the equations $y=1.4330+0.2262x-0.0008x^2$ and $y=0.9555+0.2997x-0.0031x^2$ in which y = ginsenoside content x = amount of and on the total amounts of FPCE or TP, respectively after 26.4 days, however, the difference between ginsenoside content with FPCE and TP widened. Conclusions: These results suggested that the amounts of ginsenosides in different parts of ginseng varied with the cultivation period and nutrient supply. These findings also provide fundamental data on the distribution of ginsenosides among plant parts for 2-year-old ginseng plants in the early-growth stage.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.145-145
• /
• 2022

South Korea greenhouse gas emissions have increased year by year, resulting in a total emission of 727.6 million tons of CO₂ eq in 2018, a 2.5% increase compared to 2017. Among them, the agricultural sector emitted 21.2 million tons of CO₂ eq., accounting for 2.9% of the total. Among the greenhouse gases emitted from the agricultural sector, a particularly problematic is methane gas emitted from rice paddies. Methane is one of the important greenhouse gases with a global warming potential (GWP) that is about 21 times higher than that of carbon dioxide due to its high infrared absorption capacity despite its relatively short remaining atmospheric period. Since the pattern of methane generation varies depending on the rice variety and ecological type, research related to this is necessary for accurate emission calculation and development of reduction technology. Accordingly, a study was conducted to find out the changes in greenhouse gas emission according to rice varieties and ecology types. As for the rice eco-type cultivar, early maturing cultivar (Haedamssal) and medium-late rice cultivar (Saeilmi) were used. Haedamssal was transplanted on May 25 and June 25, and Saeilmi was transplanted on June 10 and June 25. The amount of methane generated according to the growing day showed a tendency to increase as the planting period was earlier. The difference between varieties was that Haedamssal showed higher methane production than Saeilmi. The total CH₄ flux in the saeilmi was 18.7 kg·h^-1(Jun 10 transplanting), 12.4 kg·h^-1(Jun 25 transplanting) during rice cultivation. Lower methane emission was observed in Saeilmi than in Haedam rice. In addition, the earlier the planting period, the higher the methane emission. This study is the result of the first year of research, and it is planned to investigate the amount of greenhouse gas emission between double cropping and single cropping using wheat cultivation after harvest for each ecological type.