• 제목/요약/키워드: No-till

검색결과 367건 처리시간 0.203초

경운방법 및 비료종류가 이탈리안 라이그라스의 사초수량 및 품질에 미치는 영향 (Effect of Tillage System and Fertilizer Type on the Forage Yield and Quality of Italian Ryegrass)

  • 김종덕;셔윈 아부엘;전경협;권찬호
    • 한국초지조사료학회지
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    • 제29권4호
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    • pp.313-320
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    • 2009
  • 경운방법과 비료종류를 달리하였을때 이탈리안 라이그라스의 사료수량과 품질을 비교하기 위하여 수행하였다. 본 시험은 $2{\times}2=4$ 요인시험으로 경운방법은 관행(경운과 로터리)과 무경을 두었으며, 비료종류는 화학비료와 퇴비를 두었다. 이탈리안 라이그라스의 초장, 건물률, 건물수량, TDN 수량 및 CP 수량은 경운방법에서 처리간에 유의적인 차이가 있었다. 특히 무경운이 관행경운(경운+로터리)보다 건물수량, TDN 수량 및 CP 수량이 많았다. 그러나 비료의 종류에서는 처리간의 사초 생산성의 차이가 없었다. 이탈리안 라이그라스의 조단백질 함량은 처리간에 차이가 없었다. 한편 ADF 및 NDF 함량에서는 무경운이 경운보다 많았으나 TDN 및 RFV 함량은 경운이 무경운보다 높았다. 비료의 종류에서 ADF 함량은 퇴비구가 높았으나 TDN 함량은 화학비료가 높았다. 이상의 결과를 종합해 볼 때 이탈리안 라이그라스에서 경운방법은 무경운이 관행경운보다 수량은 많으나 품질은 낮았다. 한편 비료의 종류에서는 사초수량의 차이는 없고 품질 차이도 적었다.

무경운 피복작물 작부체계가 벼 뿌리 생육에 미치는 영향 (Effects of No-tillage Rice Cover Crop Cropping Systems on Rice Root Growth)

  • 손다니엘;이영한
    • 한국토양비료학회지
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    • 제44권3호
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    • pp.375-379
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    • 2011
  • 무경운 논에서 피복작물로 자운영, 볏짚, 헤어리베치, 유채, 호밀 등을 처리하고 토양 깊이별 벼 뿌리의 생육상황과 활성 유기물 함량을 조사하였다. 벼 생육초기 주당 발근량은 무경운 유채 처리구가 256 cm로 가장 양호하였으며 무경운 자운영 처리구는 214 cm, 관행은 176 cm, 무경운 헤어리베치 처리구는 139 cm, 무경운 호밀 처리구는 106 cm, 무경운 녹비무처리는 104 cm, 무경운 볏짚 처리구는 99 cm 순으로 나타났다. 토양 깊이 0-5 cm에서 무경운 볏짚 처리구에서 $128g\;m^{-2}$로 다른 처리구에 비해 유의적으로 높았다 (p<0.05). 무경운 자운영 처리구도 $83.5g\;m^{-2}$로 무경운 볏짚 처리구를 제외한 다른 처리구에 비해 유의적인 차이를 보였으며 무경운 헤어리베치 처리는 $53.0g\;m^{-2}$으로 가장 낮았다. 토양 깊이별 활성 유기물 함량은 0-5 cm 에서 무경운 자운영 처리구가 $1,684g\;m^{-2}$으로 가장 많았으며 무경운 유채 처리구 $1,309g\;m^{-2}$, 무경운 볏짚 처리구 $1,295g\;m^{-2}$, 무경운 호밀 처리구 $1,072g\;m^{-2}$, 무경운 헤어 리베치 처리구 $917g\;m^{-2}$ 순이었고 관행은 $434g\;m^{-2}$, 무경운 녹비 무처리구는 $426g\;m^{-2}$으로 매우 낮은 함량을 보였다. 본 연구결과 무경운 피복작물 작부체계에서 볏짚 처리구와 자운영 처리구는 벼 뿌리 생육과 활성 유기물 함량을 증대시키는 것으로 판단되었다.

논에 보리짚 시용시 경운방법 및 질소시비량에 따른 논물의 화학성분 변화 (Changes in Chemical Components of Stagnant Water by Tillage Method and Amount of Nitrogen Application in Wet Seeded Rice after Barley Straw Mulching)

  • 정진일;최민규;노태환;이중호;권태오
    • 한국작물학회지
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    • 제41권4호
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    • pp.411-419
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    • 1996
  • 보리입모중 벼 파종에 있어서 보리짚 시용에 따른 경운방법과 질소시용량별 관개수중에 용출된 각 성분함량 변화를 검토하였던 바, 그 결과를 요약하면 다음과 같다. 1. pH는 무경운재배에서는 시비수준간 차리가 없었으나 경운재배에서는 컸으며, 10일까지는 시비수준이 높을수록 pH가 높았으나 그 이후는 비슷하였다. 2. EC는 무경운에 비해 경운재배에서 높았으며, 경운의 유 ㆍ무에 관계없이 시비수준이 높을수록 EC도 높았다. 시기별로 보면 10일에 최고수준에 도달하였다가 그 후 감소경향이나, 20일에는 초기와는 달리 시비수준이 높을수록 EC가 감소하였고, 그 감소폭은 경운재배에서 컸다. 3. 용존산소는 무경운에 비해 경운에서 높았으며, 시비량이 많을수록 낮은 경향을 보였다. 경운방법별로는 무경운에서는 시용후일수가 경과됨에 따라 다소 증가하는 경향이었으며, 무처리에 비해 매우 낮았으나, 경운재배에서는 초기에 매우 높고 10일에 급격히 감소하였으며 그 후 다시 증가하였다. 4. NH$_4$-N는 경운의 유 ㆍ무에 관계없이 시비수준이 높을수록 높았으나, 20일에는 시비량간 차이는 없었다. 경운방법간에는 무경운에서는 10일까지 높고 그 후 감소를 보였으나 경운에서는 초기(5일)에 매우 높았다가 급격히 감소하였고, 15일에 다시 감소하였으나 20일에는 거의 발현되지 않았다. NO$_3$-N는 무경운에서는 처리일수 및 시비수준간의 차이가 매우 컸으며, 10일에 최고수준을 보였고, 그 후 20일까지 급격히 감소하였다. 경운구에서는 처리일수가 경과함에 따라 감소경향을 보였으나, 시비수준간 차이는 보이지 않았다. 5. PO$_4$$^{3-}$ 은 경운재배에 비해 무경운재배에서 높았으며, 두처리 모두 시비수준이 높을수록 높았으나, 무경운재배에 비하여 경운재배에서는 시일의 경과에 따라서도 차이가 크지 않았고 함량도 낮았다. 6. 양이온함량은 모두 경운 유 ㆍ무에 관계없이 시비수준이 높을수록 높은 경향을 보였고, 10일에 최고수준을 보인 후 완만한 감소를 나타냈으며, $K^{+}$, $Ca^{2+}$에 비해 $Mg^{2+}$이 보다 낮은 함량을 보였다.

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Breeding Difficulty of Marsh Crocodile (Crocodylus Palustris, Lesson, 1831) in Safari Park of Bangladesh

  • Masum, Kazi Mohammad;Rahman, Zahed Mohammad Malekur;Alamgir, Mohammed;Mamun, Abdullah Al;Abdullah-Al-Mamun, M.M.
    • Journal of Forest and Environmental Science
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    • 제28권4호
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    • pp.220-226
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    • 2012
  • An assessment of Marsh crocodile's (Crocodylus palustris LESSON, 1831) habitat, its feasibility in supporting the total population, feeding, hatching difficulty and variations in egg and clutch size of Marsh crocodile were carried out in Bangabandhu Sheikh Mujib Safari Park for one year (July 2010 to June 2011). Major problem identified was the breeding failure, i.e. till now no hatching were found. Mainly two local weather variables (average temperature and humidity) were identified as the most obstructing parameters. Higher temperature (average $37.03^{\circ}C$) and Lower Humidity (average 75.33%) in comparison with standard range of incubation temperature and humidity for Marsh crocodile were seems to be vital reason for the failure of hatching. Understanding of the identified problem of this paper can direct the wildlife conservationist and the policy maker to take proper action for conserving the Marsh Crocodile in Bangladesh.

기업간 전자상거래로의 시장환경 변화와 기업의 활로 모색 (The Change of Market Environment toward B-to-B E-Commerce and Groping Ways out of the Difficulties of Companies)

  • 최원익
    • 한국전자거래학회지
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    • 제6권3호
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    • pp.81-99
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    • 2001
  • The world is now meeting the era of e-commerce by development of information technology and the fast increase of use of internet. So, Korean government prepared "the colligation plan for electronic commerce activating" and WTO decides to prolong no custom on e-commerce till November 2001 when the fourth WTO Ministerial Conference holds a meeting. OECD discussed the construction of intellectual property rights of the global dimension at the Global Forum on January 2001 and reached to research the social influence of B-to-B e-commerce and to pursue the acceleration of e-commerce. UNCITRAL(United Nations Commission on International Trade Law) enacted UNCITRAL Model Law on Electronic Commerce in order to activate e-commerce, and Bolero.net serves electronic Bill of Lading to facilitate cyber trading. The purpose of this paper is to present the direction of confrontation to the these internal and external changes of business environment to Korean enterprises. Off-line enterprises should move fast to e-commerce on the condition that the existing trading at the original markets runs parallel with e-commerce. n needed, off-line enterprises should consider M&A with existing on-line firms. Also, off-line firms make use of Bolero system so that they can carry through paperless trade which means the achievement of efficiency in trading, On-line enterprises should advertise in the form of banner by combination of push and pull styles. B-to-B e-commerce firms should not depend on only the commissions, but they should create characteristic earnings by their peculiar services.

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무지외반증에서 한국인의 정상 방사선각도 계측치에 대한 연구 (Measurement of the Angle related Hallux Valgus in Normal Korean Adults)

  • 이경태;송준섭
    • 대한족부족관절학회지
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    • 제1권1호
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    • pp.11-14
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    • 1997
  • Hallux valgus is a complex deformity which contains static subluxation of the first metatarsophalangeal joint with lateral deviation of the great toe and medial deviation of the first metatarsal bone. Among the several parameters, radiographic indices are the important ones in the choice of the treatment method. Even though, the normal values of the western peoples are already estabilished, there was no standard values for Korean who has different genetics, and cultural background, till now. So, we tried to estimate the noraml values of the HVA (hallux valgus angle ), IMA ( Intermetatarsal angle) and DMAA (Distal Metatarsal Articular surface Angle) in a normal adult. Fifty normal adult (each 25 male and female) were chosen and took 100 cases of foot radiograph and radiologic indices of the hallux valgus were measured. Average age at the investigation was 34.5 years old. The average HVA is $13.3^{\circ}$, IMA is $8.5^{\circ}$ and DMAA is $34.6^{\circ}$.

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상완 신경총 손상시 건측 제 7번 경추신경 전이술 후 건측 상지의 신경 변화 (Neurologic Changes in the Donor Limb after Contralateral-C7 Transfer in Brachial Plexus Injury)

  • 한정수;차재룡;신동준;임양진
    • Archives of Reconstructive Microsurgery
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    • 제10권1호
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    • pp.7-11
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    • 2001
  • Purpose : To evaluate the neurologic abnormalities in the donor limb after contralateral C7 transfer in brachial plexus injury. Materials and Methods : From August 1996 to December 1999, five patients with brachial plexus injury were treated with contralateral C7 nerve root transfer. The average follow up was 16 months(range, 5 to 36 months). The clinical findings were assessed using the British Medical Research Council Grading System, and also measured grip power, pinch power of hand and two point discrimination of the fingers. Results : We had no difference in shoulder abduction and elbow flexion after contralateral C7 transfer. The grip and pinch strength were recovered within 4weeks. Sensory loss occurred in all patients and was noted to be more severe on index and middle finger. Four patients recovered within 2 weeks, one continued till one year. Subjective numbness and pain on percussion minimally persisted until last follow-up. Conclusion : The division of the C7 nerve root resulted in minimal and temporary functional deficit in the donor upper limb.

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김두종(金斗鍾)의 상세의학사(上世醫學史) 비판(批判) (Criticism of the 『History of Korean Medicine』 written by Kim Doo Jong)

  • 박성규;김남일
    • 한국의사학회지
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    • 제20권1호
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    • pp.68-82
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    • 2007
  • Kim, Doo-jong wrote "History of Korean Medicine", which was based on the historical view of Japanese Imperialism, insisting that Korea had stagnated and should be stimulated by others because it had no ability to improve by itself. To meet his opinion, he distorted and fabricated Korean Medical History to justify his past and work as Lee, Byung-Do did on Korean History. This paper intended to reveal his distortion and fabrication on the ancient Korean Medical History. Firstly, he insisted that Korean medicine had stagnated till other neighbor medicine, that is, Chinese medicine, Indian medicine, Japanese medicine and European medicine stimulated its progress. Secondly, he insisted that the Korea peninsula has been the Korean territory all through its history, which was originally forged by the Japanese Imperialists. He adopted this theory to justify his past and work. Thirdly, he insisted that Korea was effected by the European medicine a long time ago. Even though the European medicine was not skillful at that time compared with Korean medicine, he adopted this theory to justify his past and work. Lastly, he had a wrong recognition on culture and religion, which he just used to justify his past and work. Profound study and research are required to eliminate his distortion and write the history of Korean medicine correctly.

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경사로 오르기와 내리기 동안 압력중심 이동경로와 족저압 비교 (Comparison of Pathway of COP and Plantar Foot Pressures while Ascending and Descending a Slope)

  • 한진태
    • The Journal of Korean Physical Therapy
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    • 제22권5호
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    • pp.77-82
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    • 2010
  • Purpose: The purpose of this study was to compare the pathway of COP and plantar foot pressure and to determine the correlation between plantar regions during the ascending and descending of a ramp. Methods: Fifteen healthy adults who had no musculoskeletal problems participated in our study. They were asked to walk on a level surface and on an ascending and descending ramp in their bare feet. Pathway of COP and plantar foot pressures were recorded using the Matscan system (Tekscan, Boston, USA). For pressure measurements, the plantar foot surface was divided into seven regions: two toe regions, three forefoot regions, a midfoot region, and a heel region. To determine whether there was a statistically significant difference between pathway of COP and plantar foot pressures during walking, we used repeated measuremes ANOVA. Results: In comparison to results for a level walking, pathway of COP while ascending a ramp had a tendency to be shifted medially in the forefoot and became longer till the big toe. Pathway of COP while descending a ramp also was shifted medially, but ended in the forefoot. Plantar foot pressure of the second and third metatarsal head and the fourth and fifth metatarsal heads was significantly decreased while descending the ramp. Conclusion: These results indicated that plantar foot pressure is changed while ascending and descending a ramp and demonstrated that ramp walking can affect the structure and function of the foot. Therefore, gait environment is associated with significant changes in foot characteristics, which contribute to altered plantar loading patterns during gait.