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Effect of Oyster Shell, Fly Ash and Gypsum Application on Rice Yield and Quality (패각, 석탄회 및 석고 시용이 벼 수량과 미질에 미치는 영향)

  • Lee, Young-Han;Kim, Jong-Gyun;Lee, Han-Saeng;Cho, Ju-Sik;Ha, Ho-Seoung
    • Korean Journal of Soil Science and Fertilizer
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    • v.30 no.3
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    • pp.242-247
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    • 1997
  • This study was conducted to investigate the combined effects of oyster shell, fly ash and gypsum on rice yield and quality. The four treatments of soil amelioration were oyster shell 4, fly ash 80, fly ash 56 + gypsum 24 and oyster shell 0.8 + fly ash 40 + gypsum 24 ton/ha. Rice yield were in the order of oyster shell, fly ash and control plats. The pH, EC values and OM, Ca, $SO_4$, moisture contents of the top-soil after rice harvesting in soil amelioration treatments were increased, while Mg, Na, Fe, Zn and Al were decreased than those of control. Rice quality was the best in the fly ash plat due to lower T-N and higher Mg/K ratio.

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Influence of Polyethylene Film Mulch and Seedling Types on Growth and tuber Yield of Fall-Grown Potato (폴리에틸렌필름 멀칭 및 종묘종류가 가을감자의 생육과 수량에 미치는 영향)

  • 강봉균;강영길;강시용
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.48 no.3
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    • pp.147-151
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    • 2003
  • Normal seed tubers and plug seedlings raised from stem cutting and mini-tubers ($10\pm3$ g) were planted or transplanted on August 20,2001 in bare soil or under transparent and black polyethylene film mulches to evaluate the effects of mulch material and seedling type on the growth and tuber yield of fall-grown potato (Solanum tuberosum L. cv. Dejima) in Jeju region. Total tuber number per plant was 4.6 regardless of mulch treatment, and direct planting seed potatoes resulted in the greatest tubers (5.14)/plant and followed by transplanting seedlings raised from cutting and mini-tubers (4.15 and 5.15 tubers/plant). Transparent and black polyethylene film mulches increased total tuber yield by 16 and 8%, respectively, and average tuber weight by 14 and 12%, respectively, compared with no mulch (21.16 t/ha and 72.2 g/tuber). Transplanting plug seedlings raised from cutting resulted in the greatest tuber yield, followed by transplanting plug seedlings raised from mini-tubers and direct planting seed potatoes.

Effects of Shading on Growth of Maesa japonica Seedlings (차광 처리가 빌레나무 묘목 생장에 미치는 영향)

  • Min-Ji Park;Ju-Eun Yang;Chae-bin Lee;Yeon-Ok Seo;Byoung-Ki Choi;Eun-Young Im;Hyung-Soon Choi
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2021.04a
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    • pp.30-30
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    • 2021
  • 빌레나무는 국내에서 제주도 서부 곶자왈 지역에서만 자생하는, 어두운 환경을 선호하며 개체수가 희소한 종이다. 본 연구는 광 환경이 빌레나무 묘목 생장에 미치는 영향을 파악하고자 수행되었다. 서귀포시 난대아열대산림연구소 내 양묘장에 차광막을 이용하여 35%, 55%, 75% 차광 처리구를 설치하였고 노지에 비차광 처리구를 비교구로 설정하였다. 2019년 7월에 삽목 증식시킨 빌레나무를 2020년 5월에 각 처리구에 이식하였다. 2021년 3월에 각 차광 처리구의 모든 묘목의 묘고, 잎의 수, 줄기 수를 측정하고 생육이 건전하고 평균적인 묘목을 각 9본씩 굴취하여 건중량을 측정하였다. 35%, 55%, 75% 차광 처리구별 평균 묘고(cm)는 각각 53.2, 51.3, 41.4, 평균 잎의 수(개)는 41.3, 42.1, 24.4, 평균 줄기 수(개)는 3.1, 2.7, 2.2로 나타났다. 평균 묘고, 잎의 수, 줄기 수는 35% 차광 처리구와 55% 차광 처리구에서 75% 차광 처리구보다 높은 경향을 보였다. 건중량 분석 결과, 35%, 55%, 75% 차광 처리구별로 평균 잎 건중량(g)은 각각 11.3, 9.5, 5.5, 평균 줄기 건중량(g)은 5.6, 5.3, 2.6, 평균 뿌리 건중량(g)은 4.5, 3.6, 2.6으로 차광률이 낮을수록 증가하였으며 모든 부위별 건중량은 처리에 따른 통계적 유의성을 보였다(p<0.05). 지상부 대비 지하부 비율은 75% 차광 처리구에서 0.35로 가장 높았으며 35%, 55% 차광 처리구에서 0.27, 0.26로 나타났다. 한편, 비차광처리구의 모든 묘목들은 2021년 1~2월경 지상부가 고사하였다. 본 연구결과, 빌레나무 묘목은 노지에서 생존률이 불량하고, 차광 처리 시 차광률 증가에 따라 생장에 부정적인 영향을 받는 것으로 판단된다. 빌레나무의 건전한 생육 및 유무성증식을 통한 보급 증대에 기여하기 위하여 향후 온도, 수분 등 여러 환경 인자를 조절하는 연구가 필요한 것으로 사료된다.

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The Characteristic of Different Cultivar of Okra (Abelmoschus esculentus) under the Plastic House Condition in Jeju Island (제주지역에서 오크라 무가온 재배에 따른 품종별 특성)

  • Kim, Chun-Hwan;Ahn, Yul-Kyun;Seong, Ki-Cheol;Lee, Jin-Su;Song, Uen-Young;Kim, Seong-Cheong;Moon, Doo-Kyong
    • Journal of Bio-Environment Control
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    • v.20 no.1
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    • pp.40-44
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    • 2011
  • This study was conducted to develop method of producing okra in the plastic house and the 11 cultivar of okra were planted in plastic house for selecting proper cultivar in Korea. As result of observing growth, commercial cultivar germinated better than wild collected. The germination rate in 'No 1', 'No 4' and 'No 5' were better than in 'No 2' and 'No 3'. The plant height of 'No. 4', which is one of wild collected, showed biggest plant height moreover 'Greensode'. The numbers of node, which could indicate to set fruit, showed 4.2~6.5 per plant in most cultivar and 'No 2' and 'No 5' could yield more than others. 'Greensode' was planted in plastic house for finding out suitable planting method. The seeds were soaked could germinate 100% and those were taken 8 days for germinating but control seeds needed 15 days to germinate. The yield of 'Greensode' which was planted in $45{\times}75cm$ with planted 3 and 4 per hill could best produce in plastic house.

Characteristics of Suillus bovinus fairy rings and genets associated with thinning intensity in Pinus densiflora forests (소나무림에서 간벌강도에 따른 황소비단그물버섯(Suillus bovinus)의 균환과 genet 특성)

  • Park, Yong-Woo;Lee, Hwa-Yong;Koo, Chang-Duck
    • Journal of Mushroom
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    • v.18 no.2
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    • pp.125-134
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    • 2020
  • To study the fairy ring and genet characteristics of Suillus bovinus based on thinning intensity in Pinus densiflora forests, a simple sequence repeat (SSR) analysis was performed on the fruiting bodies of the plant. In pine wood production forests, the thinning strengths applied were 34%, 45%, and 60%. As a result, the number of fruiting bodies in the 34% treatment area was 104, which was higher than that in the other treatment areas. In the 34% treatment area, fruiting bodies occurred in a circular shape, within a diameter of approximately 5 meters (m) of the trees. In the 45% treatment area, the fruiting bodies were randomly distributed between 6 to 7 m from the trees, while in the 60% treatment, fruiting bodies occurred in a narrow oval shape, 6 m from the trees. In the control area, two fruiting bodies were present around the root collar. Hybridity was confirmed in the SSR markers of Sb-CA1 and Sb-CA3. The fruiting bodies in the 34% treatment area had a He / Ho value lower than that in the 60% treatment area. In fruiting bodies of the 34% treatment area, a total of 20 genets were identified, with an average size of 14±11 ㎡; 60% of genets were formed by a single fruiting body. In fruiting bodies of the 45% treatment area, a total of 6 genets were identified and the average size was 11±12 ㎡; 50% of genets were formed by a single fruiting body. In fruiting bodies of the 60% treatment area, a total of 10 genets were identified, with an average size of 1.1±0.8 ㎡; 70% of genets were formed by a single fruiting body. Thus, the formation ratio of a new genet increases when the thinning intensity is increased.

The incidence of the abutment screw loosening and its affecting factors in posterior implant restorations (구치부 임플란트 고정성 수복물에서의 지대주 나사 풀림 현상과 이에 영향을 미치는 요인)

  • Hong, Su-Jung;Bae, Jung-Yoon;Kim, Hyun-Hee
    • The Journal of Korean Academy of Prosthodontics
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    • v.56 no.3
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    • pp.212-217
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    • 2018
  • Purpose: This study was to assess clinically the incidence of abutment screw loosening of posterior implant-supported fixed prosthesis and its affecting factors. Materials and methods: 391 implant-supported crowns restored from January 2013 to January 2016 were included in this study. All restorations were fabricated with either a single crowns or a splinted crown, and cemented with temporary cement. The incidence of abutment screw loosening is investigated and gender, restoration position, opposing teeth, restoration type, abutment connection type were assessed as possible factors affecting abutment screw loosening. Results: During the observation period (2 - 5 years), abutment screw loosening was found in 29 restorations (7.4%). It took 3 to 48 months (means 19.5 months) to loose the screw, and three of these implants were fractured. Among the factors considered, there were statistically significant differences at abutment screw loosening rate between molar group (9.4%) and premolar group (2.6%) (P<.019). According to the type of opposing teeth, there were statistically significant differences between nature teeth (74.7%) and implant (25.0%), removable denture (3%) (P<.019). The other possible factors did not have a significant effect on loosening of the abutment. Conclusion: The incidence of abutment screw loosening in posterior restoration was 7.4%. Abutment screw loosening were more likely to occur in molars group than premolar group, and according to the opposing teeth, there were the greatest frequency in nature teeth than implant and removal denture. There was a statistically significant difference.

Multiple Car Plate Detection (다중 번호판 영역 검출)

  • 강동구;이상훈;김경현;차의영
    • Proceedings of the Korea Multimedia Society Conference
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    • 2002.05c
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    • pp.361-364
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    • 2002
  • 번호판 인식 시스템은 일반적으로 한 차선에 한 카메라를 사용한다. 만약 2개의 차로를 동시에 촬영하도록 카메라를 설치한다면 시스템 구축 비용이 많이 감소할 것이다. 본 논문은 이러한 시스템의 구축에 필요한 기본적인 방법으로써 이미지에서 번호판이 2개 이상 존재할 경우에도 그 위치를 모두 검출할 수 있는 방법에 대하여 제안한다. 번호판 후보 영역 추출은 모폴로지 연산을 통해 검출하고 각 후보 영역은 이진화후 제안한 검증 방법을 통해 후보 영역을 제거하고 번호판인 후보 영역에 대하여 정확한 번호판 영역을 검출한다. 제안한 검출 방법은 일반 번호판과 영업용 번호판 모두 검출할수 있다.

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Exterior Wall Formwork System (외벽 거푸집 시스템(구의 아크로리버 현장 사례를 중심으로))

  • 김동진;김욱종;신동호;이도범
    • Magazine of the Korea Concrete Institute
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    • v.14 no.5
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    • pp.21-26
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    • 2002
  • 구의 아크로리버 현장은 서울의 동쪽에 위치한 지하 5층, 지상 37층과 지상 22/26/29층 2개 동의 업무/판매시설 및 공동주택을 신축하는 주상복합형 프로젝트로서 주변에 강변시외버스터미널과 테크노마트가 바로 인접하여 평소 유동인구가 매우 많은 곳에 위치해 있다. (그림 1)은 구의 아크로리버의 조감도이며, 공사개요는 (표 1)과 같다.(중략)

Plant Communisty Structure in Keolim valley of Chirisan National Park (지리산국립공원 거림계곡 식물군집구조)

  • 권전오
    • Korean Journal of Environment and Ecology
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    • v.13 no.4
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    • pp.392-403
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    • 2000
  • 지리산국립공원 거림계곡 식물군집구조를 파악하기 위하여 거림계곡 내 등산로를 따라 66개(6,600m2)의 방형구를 설정하였으며 DCA 기법을 이용하여 분석한 결과 해발고 740-950m 의 조사구는 졸참나무군집(군집I) 해발 950-1,340m의 조사구는 신갈나무군집(군집II) 해발 1,340-1,390m의 조사구는 구상나무-거제수나무군집(군집III)으로 분류되었다 상대우점치 흉고직경급별 분포 분석결과 각 군집의 우점종인 졸참나무 신갈나무 구상나무가 우점하는 군집으로 계속유지될것으로 판단되었으며 특히 관목층은 조랫대의 밀도가 높아 천이진행에 영향을 주는 동시에 종다양도가 낮은 것으로 판단되었다 한편 3개 군집간의 유사도지수는 낮은 상태로 해발고에 따라 식생구분이 명확하였다

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