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加里, 燐酸 및 石灰 施用量의 差異가 大豆의 生育 및 收量에 미치는 影響
李因敦,安容泰,林炳琦 서울여자대학교 1979 서울여자대학논문집 Vol.- No.8
In order to investigate the effects of P, K, and Ca fertilization on the growth and yield of late sown soybean, cultivar Clark # 36 was examined with 9 different fertilization levels by the randomized block design replicated 4 times under the field and pot conditions, and following results were obtained. 1. Growth in field and pot conditions a. The highest stem and canopy were observed at the level of 4 to 8㎏/10a for the P, and K fertilization under the condition of lime application. b. The stem and canopy were higher in the field condition than in the pot condition. c. The P, K fertilization of 4 to 8㎏/10a was effective for the branch growth under the condition of Ca application. d. The P, K and Ca fertilization did not affect the number of brancesh, diameter of stem, and number of nodes on main stem. e. The longer branch, the thicker stem, the more number of branches and nodes on main stem were observed in the pot trial than in the field trial. 2. Dry matter production in field condition a. The leaf to stem ratio was not affected by the P, K, and Ca fertilization. b. D.M. wt. was increased in accodance with increasing the fertilization level of P, K under the condition of lime application. c. SLA and LAI were increased by the increase of the P, and K fertilization level under liming condition. d. CGR, RGR and NAR were increased in accordance with increasing the P, K, level up to 8㎏/10 a under the liming condition. e. The amounts of N, P, and K absorbed during the growing period were also increased due to increase of the P, K level up to 4 to 8㎏/10a a under the condition of lime fertilization. 3. Yield and yield components in field and pot trial a. The stem wt. was increased by the increasing of P, K level up to 8 ㎏/10a under the condition of liming. b. The pod weight and grain weight were increased by the increasing of P, K fertilization level up to 4 to 8㎏/10a with liming. c. The effect of P, K on the stem grain percentage couldn't be recognized. The stem grain percentage was higher in the pot trial than in the field trial. d. The pod number per plant was increased in accordance with increasing of the P, K fertilization level with liming. The more pod number per plant was obtained from the pot trial compared with the field trial. e. The number of ovules per pod was not affected by the fertilization. The more ovules per pod was obtained from the pot culture compared with the field culture. f. The grain number per plant was increased by the P, and K fertilization of 4 to 8㎏/10a with liming. The more grain number per plant was obtained from the pot condition compared with the field condition. g. The ripend seed percentage was highest at 4 to 8㎏/10a of the P, and K fertilization level. It was higher in the pot condition than in the field condition. h. The 100 grain weight was also increased by the P, and K fertilization of 4 to 8㎏/10a. It was heavier in the field condition than in the pot condition. i. There was a tendency that soybean plants need an ample supply of balanced nutrient elements (not single element only) for the yield increase.
비가림 및 망사 시설재배가 참다래의 수체생육 및 과실품질에 미치는 영향
나양기,마경철,임동근,김병삼,임경호,김월수,이상현,박용서 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-
This studies were conducted to investigate the effects of rain shelter and netting on the tree growth, fruit set fruit quality of kiwifruit (Actinidia deliciosa). In rain shelter and net house, shoot falling wasn't occurred by strong wind, and fruit set, fruit weight and also fruit malformation, side flowering increased at the same time. In rain shelter house the increment temperature forced blooming date and increased shoot length, leaf number and diameter but in net house these tendencies were not observed. Relative light intensity of rain shelter house was higher than that of net house with standard of field culture (relative light intensity: 100%). Soluble solid content was higher in rain shelter house, and acid content was higher in net house. With the effect of rain sheltering the occurrence of bacterial bloom rot and canker significantly decreased in both rain shelter and net house but insect injury increased. These data showed that rain shelter house is more suitable for kiwi fruit culture.
Polygoum Tinctoria와 합성 인디고 염료의 물리화학적 특성 비교
최창용,장미경,공병기,최혜영,나상권,이동병,양숙향,나재운 한국공업화학회 2002 응용화학 Vol.6 No.2
The natural dye substances appear to have a lot of benefits that enable the dyed materials to exhibit their natural colors. It may have a bit of a harmful influence on the human body itself, in comparison with the synthetic substances. It also causes hardly any environmental pollution because of the natural chemicals and costs much less to disposal. In this study was investigated physicochemical characterization of polygoum tinctoria dye substance and synthetic indigo. Calcium hydroxide was added into polygoum tinctoria leaves to precipitate dye substances and it was freezing dried into powder form. Characterizations of dye substances were investigated by UV/VIS spectrophotometer, TLC, DSC, TGA, HPLC, and MALDI-TOF Mass. Resultantly, polygoum tinctoria was confirmed that is consisted of two ingredients from these results.
Lee Won-Ick,Lee Byeong Gi,Lee Kwang Bok,Bahk Saewoong The Korea Institute of Information and Commucation 2005 Journal of communications and networks Vol.7 No.2
This paper discusses how to effectively design a next-generation wireless communication system that can possibly provide very high data-rate transmissions and versatile quality services. In order to accommodate the sophisticated user requirements and diversified user environments of the next-generation systems, it should be designed to take an efficient and flexible structure for multiple access and resource allocation. In addition, the design should be optimized for cost-effective usage of resources and for efficient operation in a multi-cell environment. As orthogonal frequency division multiple access (OFDMA) has turned out in recent researches to be one of the most promising multiple access techniques that can possibly meet all those requirements through efficient radio spectrum utilization, we take OFDMA as the basic framework in the next-generation wireless communications system design. So, in this paper, we focus on introducing an OFDMA-based downlink system design that employs the techniques of hybrid multiple access (HMA) and frequency group (FG) in conjunction with intra-frequency group averaging (IFGA). The HMA technique combines various multiple access schemes on the basis of OFDMA system, adopting the multiple access scheme that best fits to the given user condition in terms of mobility, service, and environment. The FG concept and IFGA technique help to reduce the feedback overhead of OFDMA system and the other-cell interference (OCI) problem by grouping the sub-carriers based on coherence band-widths and by harmonizing the channel condition and OCI of the grouped sub-carriers.
Layer-by-Layer Assembly for Graphene-Based Multilayer Nanocomposites: Synthesis and Applications
Lee, Taemin,Min, Sa Hoon,Gu, Minsu,Jung, Yun Kyung,Lee, Wonoh,Lee, Jea Uk,Seong, Dong Gi,Kim, Byeong-Su American Chemical Society 2015 Chemistry of materials Vol.27 No.11
<P>Two-dimensional (2D) graphene sheets have become a versatile platform for the fabrication of innovative hybrid materials with various functions due to their unique electrical, optical, thermal, and mechanical properties. The preparation of graphene-based composites with nanoscale precision is highly important for reproducible and controllable performance through the analysis of interplay between each component. In particular, the layer-by-layer (LbL) assembly technique is known as a simple, inexpensive, and versatile process for the fabrication of highly ordered multilayer film structures from various types of materials. The LbL structures capable of controlling nanoscale composition and architectures are achieved through the sequential adsorption of oppositely charged components by attractive forces such as electrostatic interactions. In this review, we will focus on the recent progress in graphene-based nanocomposites hybridized with various nanomaterials such as carbon nanomaterials, polymers, and inorganic nanoparticles by the LbL assembly. Multilayered graphene nanocomposites exhibit improved physical/chemical properties and superior performance compared with the individual components due to the synergistic effects in various applications including electric devices, energy storage and conversion, and biological usages.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2015/cmatex.2015.27.issue-11/acs.chemmater.5b00491/production/images/medium/cm-2015-00491c_0013.gif'></P>