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삽목시기, 삽수 채취 부위 및 마디수가 겨울딸기 지삽의 발근에 미치는 영향
강영길,고미라,강시용,류기중 韓國藥用作物學會 2005 한국약용작물학회지 Vol.13 No.3
2002년 6월 26일, 8월 3일 및 9월 4일에 당년 발생한 덩굴에서 정부 중부 기부의 2마디씩 채취하여 삽목하였고, 2002년 7월 10일에 삽수의 마디수를 1~4개로 달리하여 삽목하여 겨울딸기의 발근 및 신초생육을 조사한 결과는 다음과 같다. 발근율은 8월 2일 삽목구에서 69.6%로 가장 높았고 근장은 6월 26일 삽목구에서 23.1 cm로 가장 길었다. 9월 4일 삽목구의 발근율 및 신초 생육이 현저히 떨어졌다. 삽수 채취 부위별 발근율은 덩굴 중간부위에서 55.4%로 가장 높았으며 그 다음이 정단부위에서 45.6%이었고 기부에서 25.4%로 가장 낮았다. 다른 형질들은 삽수 채취부위에 따른 차이가 없었다. 발근율과 신초발생률은 삽수마디수에 따른 차이가 없었으나 삽수당 근수 및 뿌리 건물중, 신초 생육은 삽수마디수가 많을수록 증가되었다. This study was conducted to determine effects of cutting date, cutting position, and node number on rooting of Rubus buergeri Miquel. Apical, medial, and basal parts of the vines emerged in 2002 were cut on June 26, August 2, and September 4, in 2002. Vine pieces with one to four nodes taken from the medial parts of the vines were also cut on July 10. The greatest rooting (69.6%) occurred in cuttings taken on August 2. Cutting taken on June 26 had the longest roots (23.1 cm). Rooting and new shoot growth markedly decreased at September 4 cutting. The greatest rooting (55.4%) occurred in cuttings taken from medial part of the vines and followed by apical parts (45.6%), and basal parts (25.4%). The other traits were not significantly affected by cutting position. Rooting percentage and percent new shoot growth were not significantly affected by node number, but root number and root dry weight per cutting, and new shoot growth increased with node number.
Distribution of Fall-Applied N in Various Parts of Satsuma Mandarins
강영길,유장걸,김용찬,Kang, Young-Kil,U, Zang-Kual,Kim, Yoeng-Chan 한국토양비료학회 2000 한국토양비료학회지 Vol.33 No.5
To determine the distribution and recovery of fall-applied N in various parts of satsuma mandarins (Citrus unshiu Marc). $19.68g\;N\;tree^{-1}$ as urea containing 5 atom % $^{15}N$ and 58 kg$K_2O$ $ha^{-1}$ were broadcast-applied to 11 years old 'Miyagawa Wase' grown at a spacing of $2.7{\times}2.7m$ on 18 November 1998. Nitrogen, $P_2O_5$, and $K_2O$ were applied at 104, 308, and $62kg\;ha^{-1}$ on 22 March and N and $K_2O$ at 42 and $83kg\;ha^{-1}$ on 15 June 1999. Two trees were excavated on 15 June and 8 December 1999, respectively. In mid-June, whole tree contained $168.2g\;N\;tree^{-1}$ of which 11.9, 42.1, 29.7, and 16.3% were in fruits, leaves, stems, and roots, respectively. In early December, total tree N averaged $169.8g\;tree^{-1}$ and fruits accounted for 27.6%, leaves 36.4%, stems 22.8%, and roots 13.2% of total tree N. Regardless of harvest date, N derived from fertilizer was highest in newly developed tissues. In mid June, the tree recovered 18.5% ($3.63g\;tree^{-1}$) of fertilizer N. Fruits accounted for 21.1%, leaves for 50.4%, stems for 21.5%, and roots for 7.9% of fertilizer-derived N in the tree, respectively. In early December, the tree recovered 17.0% of fertilizer N. Fruits contained 39.6%, leaves 40.5%, stems 14.5%, and roots 5.3% of fertilizer-derived N in the tree respectively. Comparing with total tree N, a higher proportion of fertilizer-derived N was allocated to metabolically active tissues while a less proportion to old tissues regardless of harvest date. 1998년 11월 18일에 $2.7{\times}2.7m$ 거리로 재식된 11년생 궁천조생온주 4주에 5 atom % 15N를 요소로 19.68 g 주-1의 N, $58kg\;ha^{-1}$의 $K_2O$을 시용하였고, 1999년 3월 22일에 104, 308, $62kg\;ha^{-1}$의 N, $P_2O_5$, $K_2O$를 6월 12일에 42 and $83kg\;ha^{-1}$의 N와, $K_2O$를 시용하여 재배한 후 1999년 6월 15일과 12월 8일에 각각 2주씩 굴취 해체하여 전질소 및 가을시용질소 함유량을 수체 부위별로 조사하였다. 과실, 잎줄기, 뿌리에의 전질소함유량의 분포비율은 6월 굴취 때에 각각 주당 전질소 총함유량(168.2g)의 11.9, 42.1, 29.7, 16.3%이었고, 12월 굴취 때에 각각 주당 전질소 총함유량 (169.8g)의 27.6, 36.4, 22.8. 13.1%이었다. 수체 질소 중 가을시용질소에서 유래된 질소의 비율은 두 굴취 시기 모두 새로 발생된 기관에서 현저히 높았다. 6월 굴취 때의 가을시용질소 회수율은 18.5%(3.63g 주-1)이었고, 주당 가을시용질소 총함유량의 21.1, 50.4, 21.5, 7.9%가 각각 과실 잎, 줄기, 뿌리에 분포되어 있었다. 12월 굴취 때의 가을시용질소 회수율은 17.0%(3.35g 주-1)이었고 가을시용질소 총함유량의 39.6, 40.5, 14.5, 5.3%가 각각 과실, 잎, 줄기, 뿌리에 분포되어 있다. 전질소에 비하여 두 시기 모두 가을시용질소에서 유래된 질소는 대사적으로 활발한 조직에 보다 많이 축적된 반면 오래된 조직에는 보다 적게 축적되었다.
파종기 및 재식밀도에 따른 콩 수량에 있어 분지의 기여도
고미라,오현도,고영우,강영길 濟州大學校亞熱帶農業硏究所 1997 亞熱帶農業硏究 Vol.14 No.-
Determinate soybean cultivars 'Baikunkong' and 'Namhaekong' were planted on 8 June, 23 June and 8 July 1996 at Cheju at plant densities of 33, 43, 53, 63 plants per ㎡ to determine the contribution of branches to seed yield and its components. Namhaekong had 0.7 more branches than Baikunkong. Branch contribution to the number of pods and seeds, and seed yield per plant for Namhaekong was 11.0 11.0, 11.3% points greater, respectively, than for Baikunkong. There was no difference between two cultivars for branches to main stem ratio for seed number and 100 seed weight. Soybean tended to produce more branches at 8 and 23 June plantings than at 8 July planting. Branch contribution to the number of pods and seeds, and seed yield per plant was also gloater at 8 and 23 June plantings than at 8 July planting. Branches to main stem ratio for seed number and 100 seed weight tended to decrease as planting was delayed. Branch number per plant decreased as plant density increased while branch number per ㎡ was not affected by Plant density. Branch contribution to the number of pods and seeds and seed yield per plant decreased with a increase in plant density. There was no trend among four plant densities for branches to main stem ratio for seed number and 100 seed weight.
玄京卓,趙南棋,宋昌吉,姜榮吉 濟州大學校亞熱帶農業硏究所 1996 亞熱帶農業硏究 Vol.13 No.-
SummaryFive shading levels (0, 5, 50, 75 and 90%) were investigated for their effects on growth and yield of Liriope platyphylla Wang et Tang. The results obtained were summarized as follows;1. Plant height and leaf length increased with increasing shading levels up to 50% and then decreased with further increasing shading. Leaf width ranging from 0.49 to 0.52cm tended to linearly decrease as shading level was increased. 2. SPAD reading was linearly increased from 56.9 to 69.5 as shading level was increased from 0 to 90%. 3. There was no difference in fresh leaf weight among shading levels. However, fresh weight of roots, tuberous roots, and shoots + roots decreased with increasing shading level. 4. The number of tuberous roots per plant decreased from 21.4 at 0% shading to 11.8 at 90% shading. Dry weight per tuberous root was heaviest (0.4g) at 35% shading and then declined with increasing shading level. 5. Dry tuberous root yield per plant ranged from 6.5g at 0% shading to 3.1g at 90% shading showing linear relationship between yield and shading level. Yield per plant highly correlated wish the number of tuberous roots per plant. 6. The results indicate that growing Liriope platyphylla Wang et Tang under shading has no advantage in Cheju province.
변형체간의 접촉을 고려한 3차원 초소성 성형/확산접합의 유한요소해석
강영길,송재선,홍성석,김용환,Kang, Yung-Kil,Song, Jae-Sun,Hong, Sung-Suk,Kim, Yong-Hwan 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.1
Superplastic forming/diffusion bonding(SPF/DB) processes with inner contact were analyzed using a 3-D rigid visco-plastic finite element method. A constant-triangular element based on membrane approximation and an incremental theory of plasticity are employed for the formulation. The hierarchical search algorithm for the contact searching has been applied. The algorithms for contact force processing were designed to handle equally well contact between deformable bodies, as well as rigid bodies. The plate of three and four sheets for 3-D SPF/DB model are analyzed using the developed program. The validity for the analysis is verified by comparison between analysis, experiment and results in the literature.