http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Ye Bi ) (검색결과 77 건)
- 무료
- 기관 내 무료
- 유료
-
-
Plant Analysis Methods for Evaluating Mineral Nutrient
Ye-Jin Lee,Jwa-Kyung Sung,Seul-Bi Lee,Jung-Eun Lim,Yo-Sung Song,Deog-Bae Lee,Suk-Young Hong 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.2
Analysis of mineral nutrients in plant is required for evaluating diagnosis of plant nutritional status. Pretreatment procedure for the analysis of plant can be varied depending on elements to be analyzed. Wet-digestion is suitable for total nitrogen, phosphate and cations, however, digestion solution including nitric acid is not suitable for nitrogen analysis. Incineration procedure is required to analyze chloride, silicate and total sulfur. After digestion, total nitrogen is analyzed by Kjeldahl method, and phosphate is detected at 470nm by colorimetric analysis with ammonium meta vanadate. Cations and micro elements are determined by titration or colorimetry, also, these elements can be measured by Atomic absorption spectrometer (AAS) or Inductively coupled plasma spectrometer (ICP).
-
Nonlinear structural model updating based on the Deep Belief Network
Ye Mo,Zuo-Cai Wang,Genda Chen,Ya-Jie Ding,Bi Ge 국제구조공학회 2022 Smart Structures and Systems, An International Jou Vol.29 No.5
In this paper, a nonlinear structural model updating methodology based on the Deep Belief Network (DBN) is proposed. Firstly, the instantaneous parameters of the vibration responses are obtained by the discrete analytical mode decomposition (DAMD) method and the Hilbert transform (HT). The instantaneous parameters are regarded as the independent variables, and the nonlinear model parameters are considered as the dependent variables. Then the DBN is utilized for approximating the nonlinear mapping relationship between them. At last, the instantaneous parameters of the measured vibration responses are fed into the well-trained DBN. Owing to the strong learning and generalization abilities of the DBN, the updated nonlinear model parameters can be directly estimated. Two nonlinear shear-type structure models under two types of excitation and various noise levels are adopted as numerical simulations to validate the effectiveness of the proposed approach. The nonlinear properties of the structure model are simulated via the hysteretic parameters of a Bouc-Wen model and a Giuffré- Menegotto-Pinto model, respectively. Besides, the proposed approach is verified by a three-story shear-type frame with a piezoelectric friction damper (PFD). Simulated and experimental results suggest that the nonlinear model updating approach has high computational efficiency and precision.
-
Optimal Fertigation Guide for Greenhouse Strawberry: Development and Validation
Ye-Jin Lee,Seul-Bi Lee,Jwakyung Sung 한국토양비료학회 2021 한국토양비료학회지 Vol.54 No.3
Development of a customized fertigation guide for greenhouse crops is a very important means to attain soil quality control as well as a favorable crop yield. In this study, we tried to develop and validate the fertigation guide of greenhouse strawberry using crop growth and NPK uptake rates by the specific growth stage. To achieve these goals, we firstly applied 4 different N levels based on soil-testing recommendation rates (SR) of Standard Fertilizer Recommendation: 0.5, 0.75, 1.0 and 1.5 times of SR. Phosphate and potassium were applied as much as the SR by the guide. Strawberry plants were cultivated from Sep., 2017 to May, 2018 with the density of 1.0 × 0.1 m. The growth and NPK uptake rates were estimated every 30 days from 30 days after transplanting (DAT) until final harvest. The growth rates (as expressed dry weight) were not significantly different between N treatments throughout the whole growth period. Soil nitrate-N contents at the final harvest stage showed significant difference between treatments; 1.5 times was the greatest and the others were similar to each other as much as the contents before transplanting. In order to validate effects of the newly developed fertigation guide, the yield was compared to soil-testing based fertigation rates and farmer’s practice, and was not significantly differed between both practices. On the other hand, the nutrient use efficiency was the greatest in the developed fertigation guide for both N and P due to the reduced fertilizer application. It implies that the growth rates-based variable application is a key consideration to make the fertigation guide of various greenhouse crops for sustainable cultivation.
-
Ye-Jin Lee,Seul-Bi Lee,Jwakyung Sung 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
The fertigation system has continuously been increasing to extend crop cultivation, to provide simultaneously water and mineral nutrients, and to finally enhance yield and quality. The fertigation has a strength to regulate water and fertilizer relatively freely without any limitation of time, quantity, and type of fertilizers. However, a decision for those extremely depends on farmer’s experience due to an absence of standardized fertigation manual for each crop. As a measure to solve these problems, it should be firstly considered when, what and how farmers implement various requirements, and thus we surveyed some basic information to make a concept for crop-customized fertigation manual. The workflow was as followed: 1) choose crops → 9 major vegetables growing with fertigation, 2) monitor massive production area and select 2 sites with different cultivation period, 3) on-site survey and sampling at least two times during cultivation, early harvest and maximum harvest stages, and 4) analyze soil and plant samples and compute optimal rates for crop- and cultivation type-customized fertigation. Plant density was greater in forcing cultivation, and application rates were relatively higher in sequential harvest. The ratio of top dressing (fertigation) to total application generally ranged from 60 - 80% although some farmers were beyond the bounds. Mineral nutrient contents (N, P, and K) were more concentrated in Solanaceae, and it was observed that the quantity and concentration of fertigation were higher in sequential (e.g. cucumber) compared to once (e. g. watermelon). Given the result from the present on-site survey, it is carefully suggested to revise an application rate of top dressing for fertigation, to make the standardized- or customized-fertigation manual by crops, to implement practical means to optimize soil mineral contents, and to extend an education about application of smart and effective fertigation for farmers.
-
Ye-Jin Lee,Seul-Bi Lee,Jwakyung Sung 한국토양비료학회 2019 한국토양비료학회지 Vol.52 No.4
It is one of most important works to recognize the nutritional status of crops for promoting best nutrient management. Furthermore, a rapid and accurate diagnosis of mineral nutrients is strongly required at agricultural on-site. Here, we described the optimal range for favorable crop growth and development based on the results of previous researches performed since 1990 in NAS, RDA, and focused on explaining analytical method and optimal range of water soluble-based N, P and K for greenhouse crops. Water soluble mineral N, P and K differently responded with leaf position and crop; overall, soluble N was higher in fully expanded leaves, soluble P was relatively higher young leaves and soluble K constantly remained in all leaves. Given the results, water soluble mineral nutrients of greenhouse crops showed relatively higher in Solanaceae (e.g. paprika and eggplant) than in Cucurbitaceae (e.g. cucumber and watermelon). In this respect, the nutrient management in terms of fertilization and crop uptake is necessary to make crop-specific strategy. Although the criteria for nutrient diagnosis based on water soluble extracts was described in this paper, we carefully suggest that better criteria for nutrient diagnosis should be advanced with consideration for diurnal pattern of water soluble minerals, difference in sample destruction degree, duration of storage of samples taken, and etc.
-
Bi Gong,Shuai Huang,Niu Ye,Xue Yuan,Huiling Ma 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6
We studied the role of ethylene control in regulating energy metabolism, antioxidant enzyme activity, and vase life of cutrose Rosa hybrida ‘Carola’. Rose fl owers at stage II were sprayed with one of the following solutions: water (control), 10μL L −1 1-methylcyclopropene (1-MCP), or 0.5 g L −1 2-chloroethanephosphonic acid (ethephon). After harvest, ethyleneproduction rate, respiration intensity, energy charge (EC), activities of energy metabolism-related and antioxidant enzymes,and malondialdehyde (MDA) content were measured. Results showed that 1-MCP enhanced the activities of superoxidedismutase, H + -adenosine triphosphatase, Ca 2+ -adenosine triphosphatase, succinic dehydrogenase, and cytochrome c oxidase,increased adenosine triphosphate (ATP) content, maintained high EC levels, inhibited respiration intensity, reduced peroxidase(POD) and polyphenol oxidase (PPO) activity and MDA accumulation, and prolonged vase life. Ethephon promotedethylene production and respiration intensity, increased POD and PPO activity, reduced ATP content and EC levels, andaccelerated senescence. Our results support a novel role for ethylene control in regulating senescence of ‘Carola’.
-
-
Ye-Jin Lee,Jwa-Kyung Sung,Seul-Bi Lee,Jung-Eun Lim,Yo-Sung Song,Deog-Bae Lee 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.4
The objectives of fertilizer recommendation are to prevent the application of excessive fertilization and to produce target yields. Also, optimal fertilization is important because crop quality can be influenced by fertilization. In this study, yields and fertilizer use efficiency of Taro (Colocasia esculenta Schott) were evaluated in different level of NPK fertilization. N, P and K fertilizer application rates were 5 levels (0, 50, 100, 150, 200%) by practical fertilization (N-P₂O5-K₂O = 180-100-150 kg ha<SUP>-1</SUP>), respectively. In the N treatment, the yields of Taro tuber were about 33 Mg ha-1 from 90 to 360 kg ha<SUP>-1</SUP> N fertilization. However, the ratio of tuber to total biomass decreased with increasing N fertilization rate. In the P and K treatments, yields of Taro tuber were the highest at 150 kg ha<SUP>-1</SUP> fertilization. Fertilizer use efficiency was decreased by increase of N and K fertilization. Crude protein of Taro tuber was the highest at practical fertilization. Sucrose content of tuber was influenced by phosphate application.
-
Yield and Free Sugar Contents of Burdock (Arctium lappa L.) depending on Nitrogen Levels
Ye-Jin Lee,Jwa-Kyung Sung,Seul-Bi Lee,Jung-Eun Lim,Yo-Sung Song,Deog-Bae Lee 한국토양비료학회 2016 한국토양비료학회지 Vol.49 No.6
Excessive nitrogen fertilization influences crop yields and quality as well as environmental pollution. In this study, yields, nitrogen use efficiency and free sugar contents of burdock (Arctium lappa L.) were evaluated at different levels of nitrogen fertilization. Nitrogen fertilizer was applied at 5 levels (0, 50, 100, 150, 200%) based on the conventional fertilization (N = 230 kg ha<SUP>-1</SUP>), and phosphate and potassium fertilizer were treated by conventional P and K fertilization (P₂O5 - K₂O = 140 - 210 kg ha<SUP>-1</SUP>) in all plots. The root yields of burdock were the highest in N 100~150% treatment plots. Nitrogen use efficiency and nitrogen recovery decreased from over N 150% treatment. Nitrogen uptake of root was greater than that of shoot in N 50~200% treatments. Fructose contents in root were inversely proportional to the level of nitrogen fertilization. As considering nitrogen recovery and root quality, economical burdock yield was obtained in N 230 kg ha<SUP>-1</SUP>.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
