http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최은영,정영애,안승현,장동철,김대현,이동수,권진경,우영회,Choi, Eun-Young,Jeong, Young-Ae,An, Seung-Hyun,Jang, Dong-Cheol,Kim, Dae-Hyun,Lee, Dong-Soo,Kwon, Jin-Kyung,Woo, Young-Hoe The Korean Society for Bio-Environment Control 2021 생물환경조절학회지 Vol.30 No.4
This study aimed to estimate the photosynthetic capacity of tomato plants grown in a semi-closed greenhouse using temperature response models of plant photosynthesis by calculating the ribulose 1,5-bisphosphate carboxylase/oxygenase maximum carboxylation rate (V<sub>cmax</sub>), maximum electron transport rate (J<sub>max</sub>), thermal breakdown (high-temperature inhibition), and leaf respiration to predict the optimal conditions of the CO<sub>2</sub>-controlled greenhouse, for maximizing the photosynthetic rate. Gas exchange measurements for the A-C<sub>i</sub> curve response to CO<sub>2</sub> level with different light intensities {PAR (Photosynthetically Active Radiation) 200µmol·m<sup>-2</sup>·s<sup>-1</sup> to 1500µmol·m<sup>-2</sup>·s<sup>-1</sup>} and leaf temperatures (20℃ to 35℃) were conducted with a portable infrared gas analyzer system. Arrhenius function, net CO<sub>2</sub> assimilation (A<sub>n</sub>), thermal breakdown, and daylight leaf respiration (R<sub>d</sub>) were also calculated using the modeling equation. Estimated J<sub>max</sub>, A<sub>n</sub>, Arrhenius function value, and thermal breakdown decreased in response to increased leaf temperature (> 30℃), and the optimum leaf temperature for the estimated J<sub>max</sub> was 30℃. The CO<sub>2</sub> saturation point of the fifth leaf from the apical region was reached at 600ppm for 200 and 400µmol·m<sup>-2</sup>·s<sup>-1</sup> of PAR, at 800ppm for 600 and 800µmol·m<sup>-2</sup>·s<sup>-1</sup> of PAR, at 1000ppm for 1000µmol of PAR, and at 1500ppm for 1200 and 1500µmol·m<sup>-2</sup>·s<sup>-1</sup> of PAR levels. The results suggest that the optimal conditions of CO<sub>2</sub> concentration can be determined, using the photosynthetic model equation, to improve the photosynthetic rates of fruit vegetables grown in greenhouses. 본 연구는 반밀폐형 토마토 재배 온실에서 광합성율 극대화를 위한 적정 탄산가스 시비 농도를 구명하고자 광합성 모델을 이용하여 잎의 최대 카복실화율(V<sub>cmax</sub>), 최대 전자전달속도(J<sub>max</sub>), 열파괴, 잎 호흡 등을 계산하고 실제 측정값과 비교하였다. 다양한 광도(PAR 200µmol·m<sup>-2</sup>·s<sup>-1</sup> to 1500µmol·m<sup>-2</sup>·s<sup>-1</sup>)와 온도(20℃ to 35℃) 조건에서 CO<sub>2</sub> 농도에 대한 A-C<sub>i</sub> curve는 광합성 측정 기기를 사용하여 측정하였고, 모델링 방정식으로 아레니우스 함수값(Arrhenius function), 순광합성율(net CO<sub>2</sub> assimilation, A<sub>n</sub>), 열파괴(thermal breakdown), R<sub>d</sub>(주간의 잎호흡)를 계산하였다. 엽온이 30℃ 이상으로 상승하였을 때 J<sub>max</sub>, An 및 thermal breakdown 예측치가 모두 감소하였고, 예측 J<sub>max</sub>의 가장 최고점은 엽온 30℃였으며 그 이상의 온도에서는 감소하였다. 생장점 아래 5번째 잎의 광합성율은 PAR 200-400µmol·m<sup>-2</sup>·s<sup>-1</sup> 수준에서는 CO<sub>2</sub> 600ppm, PAR 600-800µmol·m<sup>-2</sup>·s<sup>-1</sup> 수준에서는 CO<sub>2</sub> 800ppm, PAR 1000µmol·m<sup>-2</sup>·s<sup>-1</sup> 수준에서는 CO<sub>2</sub> 1000ppm, PAR 1200-1500µmol·m<sup>-2</sup>·s<sup>-1</sup> 수준에서는 CO<sub>2</sub> 1500ppm을 공급했을 때 포화점에 도달하였다. 앞으로 광합성 모델식을 활용하여 과채류 온실 재배 시 광합성을 높일 수 있는 탄산시비 농도를 추정할 수 있을 것으로 판단된다.
안영애,임정빈 漢陽大學校 韓國生活科學硏究所 1987 韓國 生活 科學 硏究 Vol.- No.5
The purpose of this study is to investigate the practical situation of money management in each household by soci-economic status and demographic variables, and to suggest the problems of household money management. The date for this study was obtained from the survey of the 2,185 housewives who reside all over Korea employing questionnaire method. Such methods as freqency, percentile, χ2-test, and F-test were used for the statisical analysis for this study. The major findings of this study are as follows: (1) The planning for effective family economy management and consumer behavior was relatively high when housewivs were younger and their socio-economic status was high. (2) The purpose of saving was revealed in order of ① preparation for educational expenditure of children, ② preparation for an unexpected urgent situation, ③ purchase of real estate. (3) Each item of household expenditure was especially different according to the residence area. (4) Property inheritance was still preferential to the first son. But it was found that in the case of property inheritance the status of housewives was considerably improved.