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RISS 인기검색어
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New Zealand 산 도입목초의 강원지역에 있어서 적응성 비교시험
김창주,장병호,이창덕 ( C . J . Kim,B . H . Chang,C . D . Lee ) 한국축산학회 1978 한국축산학회지 Vol.20 No.3
A comparative experiment was carried out in Chunchon and Taekwanryong, Kangwondo to test the adaptability of pasture plants introduced from New Zealand. The New Zealand introduced pasture plants tested in this experiment were orchargass-Apanui(O-A), perennial ryegrass-Ruanui(P-R), Tama ryegrass(Ta), timothy-Kahu(Ti-K), white clover-Huia(W-H), alsike clover(As), red clover-Hamau(R-H) and alfalfa-Wairau(Af-W); besides those plants U.S.A. introduced orchardgrass-Potomac(O-P) and Ladino clover(L), Canada introduced perennial ryegrass-Norlea(P-N) and Australia introduced tall fescue-Demeter (Tf-D) were included in this experiment to compare with the New Zealand introduced pasture plants. The Chunchon experimental field(94m above sea level) was sown on the 8th of May 1977 and the Taekwanryong experimental field(820m above sea level) on the 10th of 1May 1977, and the experiment was carried on until April 1978. The results obtained were summarized as follows: 1. O-A and P-R were slower in early stage growth, lower in the year total yield of dry matter and poorer in wintering record than O-P and P-N respectively. 2. O-A and P-R seemed to unsuitable varieties for the Kangwon area. 3. Ta, which proved to be annual, was thought to be utilized sooner after the sowing because its early stage growth was extremely vigorous. 4. Ta demonstrated abundant production marking 10.99 t/㏊ in the year total yield of dry matter in the Taekwanryong experimental field. Nevertheless, Ta`s summering record was inferior in the Chunchon experimental field. 5. In the both experimental fields of Chunchon and Taekwanryong, Ti-K showed a poor record in summering and presented a low year total yield of dry matter but it was found to be outstanding in winter survival. 6. W-H was regarded to have the strongest winter hardiness among the legume plots, yet it marked rather a lower dry matter yield. 7. It is presumed that R-H will find no difficulty in wintering even in the alpine region but will fall into trouble in summering in the lowlands. 8. Af-W made poor growth in both the Chunchon and Taekwanryong experimental field. 9. Though L recorded the highest year total yield of dry matter among the legume plots, most of L were winterkilled in the Taekwanryong experimental field. 10. O-P and Tf-D presented comparatively good record in summering and wintering, and Tf-D showed the highest year total yield of dry matter in the Chunchon experimental field presenting 6.01 t/㏊. 11. P-N and As revealed comparatively strong winter hardness even in the Taekwanryong experimental field. 12. In the year total yield of dry matter the Taekwanryong experimental field was larger than the Chunchon experimental field by 79.1% in the grasses and by 13.8% in the legumes.
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사정환(J.H. Sa),박수형(S.H. Park),김창주(C.J. Kim),강희정(H.J. Kang),김승범(S.B. Kim),김승호(S.H. Kim) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
In this work, a comparative study is performed for simulation of rotor in hovering flight with a 3D compressible Navier-Stokes solver using overlapped grid systems. The shape of rotor blade consists of optimized rotor blade planforms. Optimized blade planforms are designed considering high performance on hovering and forward flight. To show the verification of optimized rotor blade planforms, blade loading(C<SUB>T</SUB>, FM, C<SUB>Q</SUB>) and the vortex behavior of optimized blade shape are compared with original blade shape.
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김창주,Kim, C.J. 한국전자통신연구원 2006 전자통신동향분석 Vol.21 No.4
유비쿼터스 정보화사회의 도래와 함께 한정된 주파수자원에 대한 수요가 증가됨에 따라 이를 효율적으로 이용하기 위한 기술이 더욱 각광을 받고 있다. 이중에서도 스펙트럼 환경을 측정하여 사용하지 않은 주파수를 선정, 기존의 전파환경과 양립하면서 통신을 하는 CR 기술은 미래 무선통신의 핵심 기술로 인식되고 있다. CR 기술은 SDR 기술을 기반으로 스펙트럼 센싱(spectrum sensing) 기능을 활용하여 가용한 주파수를 선정하여 통신하는 기본적인 기능과 여러 가지 환경 파라미터를 지속적으로 업데이트하는 learning algorithm이 합쳐진 기술이다. 본 고에서는 CR 기술을 설명하고, CR의 응용으로 현재 표준화가 진행되고 있는 IEEE 802.22 WRAN 표준화 활동과 WG에서 검토되고 있는 기술, 즉 physical layer, MAC layer, 그리고 spectrum sensing의 주요기술을 소개한다.
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종근의 크기와 재직방법이 Russian Comfrey ( Symphytum peregrium LEDEB . ) 의 발아 및 초기생육에 미치는 영향
김창주 ( C J Kim ),윤익석 ( I S Yun ) 한국축산학회 1973 한국축산학회지 Vol.15 No.1
Experiments were carried out to determine the effects of size and planting method of seed root on the sprout and early stage growth of Russian Comfrey(Symphytum peregrinum LEDEB.) during the period of 8 weeks from April to July 1972 at Kangwon National University, Chunchon. The seed roots used in the experiments classified into 3 classes of diameter of 0.5㎝, 1.5㎝ and 2.5㎝, and 4 classes of length of 2㎝, 5㎝, 8㎝ and 11㎝, and the seed roots were planted in 3 kinds o method, vertical planting, horizontal planting and reversed vertical planting. The results are summarized as follows: 1. Sprout percentage was higher and early stage growth was better with thicker and longer seed root. 2. In sprout percentage and early stage growth 0.5㎝-diameter plot was definitely inferior to 15㎝-diameter plot, and 2㎝-length plot was to 5㎝ and over-length plots(p$lt;0.05). But 1.5㎝-diameter plot was not significantly inferior to 2.5㎝-diameter plot, and 5㎝-length plot was not to 8㎝ and over-length plots in sprout percentage and early stage growth. 3. 1.5㎝-diameter. 5㎝-length was considered as adquate size of seed root. Showing 89.7% of sprout percentage, 28.0㎝ of leaf length, 7.2g of tops DM weight and 6.8g of roots DM weight at 8th week, 1.5㎝-diameter·5㎝-length plot did not fall so far behind those plots planted with seed roots which were bigger than that of 1.5㎝-diameter·5㎝-length plot in sprout percentage and early stage growth. 4. It seemed that sprout percentage and early stage growth were being improved by means of increasing in length in the seed root of small diameter or increasing in diameter in the seed root of short length. A thin and long seed root, however, seemed to show comparatively higher sprout percentage and better early stage growth rather than a thick and short one (p$lt;0.05). 5. Sprouting and early stage growing records made by the seed roots of every class of diameter stood in order of vertical planting]horizontal planting]reversed vertical planting. 6. On account of good sprout percentage and early stage growth, saving labor for planting and no probability of reversed planting the horizontal planting was thought as recommendable method. In. sprout and early stage growth, the reversed vertical planting was definitely inferior to the vertical planting and to the horizontal planting (p$lt;0.01). 7. 1.5㎝-diameter·horizontal planting plot was thought as the plot planted with the adquate seed root of thickness and the suitable planting method. Displaying 85.0% of sprout percentage, 27.0㎝ of leaf length, 6.6g of taps DM weight and 6.0g of roots DM weight at 8th week, the 1.5㎝-diameter·horizontal planting plot were not significantly worse in sprout percentage and early stage growth than the plots planted with the seed roots of above 1.5㎝-diameter in vertical or in horizontal method.
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김창주(C . J . Kim),김병완(B . W . Kim) 한국축산학회 1991 한국축산학회지 Vol.33 No.5
This experiment, as a part of tire studies on soiling forage production for the dairy farm in the Taekw-anryong area was curried out to determine the appropriate keel and method of nitrogen application and examine proper level of lime application to the forage rape(Brassica napus Subsp. oleifera) Two cultivars of the forage rape, Akela and Ramon. were sown on the experimental field(840m above sea level) located in Hoengke-2-ri Toam-myon Pyongchang-gun Kangwon-do. Korea. and they were harvested 70 days after the sowing The plot, of nitrogen treatment consisted of three-level plots applied with 80㎏/㏊ 160 ㎏/㏊ and 240㎏/㏊ of nitrogen. respectively and each level of nitrogen was applied through two methods. One of the methods was applying the whole amount of nitrogen us basal fertilizer (treatment mark:B100). and the other was applying one half of the nitrogen as basal fertilizer and the other half as top dressing(treatment mark: B50/T50). the plots of lime treatment consisted 01 three-level plots applied with 0㎏/㏊, 1500㎏/㏊ and 3000㎏/㏊ of lime. respectively. The results obtained were summarized a, follows 1. In plant length in the B100. Ramon marked 41.9㎝ 48.8㎝ and 53.6㎝ in the plots of 80㎏/㏊, 160㎏/㏊ and 240㎏/㏊ of nitrogen level. respectively Akela was shorter than Ramon by 1.9-3.7㎝ and the B50/T50 was shorter than the B1011 by 3.9-4.1㎝ in the both cultivars. Throughout the three level of lime application. tile plant length of Akela and Ramon ranged narrowly in 46.5-47.8㎝ and 49.3-51.1㎝ respectively: differences of plant length found among all the levels of lime application were slight. 2. In fresh forage yield in the B100, Akela and Ramon showed 32.12t/㏊ and 38.61t/㏊. 37.63t/㏊ and 52.08 t/㏊ 43.86 and 59.01t/㏊ in the plots of 80㎏/㏊ 160㎏/㏊ and 240㎏/㏊ of nitrogen level, respectively. Fresh forage yield of the B50/T50 was lower than the B100 by 4.01t/㏊ in Akela, and by 9.52t/㏊ in Ramon. Throughout the three levels of lime application. the fresh forage yield of Akela ranged narrowly in 36.18-36,70t/㏊ and Ramon narrowly in 50.64-50.82t/㏊: the effect of lime application was inconsiderable. 3. In dry matter yield in the B100, Ramon recorded 5.14t/㏊ 6.82t/㏊ and 7.22t/㏊ in the plots of 80㎏/㏊, 160㎏/㏊ and 240㎏/㏊ of nitrogen level respectively: the yield increased remarkably along with the rising level of nitrogen application(p$lt;0.05). Ramon recorded higher dry matter yield than Akela by 16.8%, 5% and 37.0% in the plots of 80㎏/㏊, 160㎏/㏊ and 240㎏/㏊ of nitrogen level, respectively(p$lt;0.05). The B50/T50 was lower in dry matter yield than the B100 by 10.0% in Akela, and by 24.3% in Ramon(p$lt; 0.05). Significant differences were not recognized among all the levels of plot treated by lime, with Akela ranging narrowly in 4.92-5.14t/㏊ and Ramon narrowly in 6.84-7.07t/㏊. 4. It seems that the appropriate level of nitrogen application is 240㎏/㏊ in the Tackwanryong area. 5. It is recommendable that the whole amount of nitrogen should he applied only as basal fertilizer rather than splitting it into one half as basal fertilizer and the other half as top dressing. 6. It is difficult to confirm the necessity of lime application.
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