Nobuyuki Sato, H. Moriya, K. Yasui, Tomoyasu Nonoshita
{"title":"Saving Energy with a Hybrid Heating System using an Air-to-air Heat Pump and Oil Heater in a Rose Greenhouse","authors":"Nobuyuki Sato, H. Moriya, K. Yasui, Tomoyasu Nonoshita","doi":"10.2525/SHITA.25.19","DOIUrl":"https://doi.org/10.2525/SHITA.25.19","url":null,"abstract":"Shizuoka Prefectural Institute of Agriculture and Forestry, 678-1 Tomigaoka, Iwata, Shizuoka, Japan Chubu Electric Power Co., Inc.,20-1 Kitasekiyama, Ohdaka-cho, Midori-ku, Nagoya, Japan Mitsubishi Heavy Industries Air-Conditioning & Thermal Systems Corporation, 3-1 Asahi, Nishibiwajima-cho, Kiyosu, Aichi, Japan NEPON Inc., 1-4-2, Shibuya, Shibuya-ku, Tokyo, Japan 空気熱源式ヒートポンプと燃焼式温風暖房機 とのハイブリッド運転によるバラ栽培の暖房費削減効果","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132082648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Itoh, S. Tomoda, Tomoko Hatta, N. Shiraishi, Y. Uno
{"title":"Development of a Hyperspectral Imaging System to Detect Nitrate Concentration of Spinach Callus","authors":"H. Itoh, S. Tomoda, Tomoko Hatta, N. Shiraishi, Y. Uno","doi":"10.2525/SHITA.24.233","DOIUrl":"https://doi.org/10.2525/SHITA.24.233","url":null,"abstract":"The purpose of this study was to develop a hyperspectral imaging system that can detect gene recombinant calluses. Drug tolerance genes are commonly used as marker genes, although they may negatively affect the environment. Hence, we aimed to use the genes that code for nitrate reductase (NR) as marker genes. Once the NR genes are introduced into a cell, the recombined genes would show greater nitrate reduction compared with the wild-type genes, making it possible to use the nitrate concentration for discriminating gene recombinant calluses from non-recombinant ones. In the present study, a non-destruc-tive method of measuring the nitrate concentration in spinach ( Spinacia oleracea L. ‘Orai’) calluses was developed to allow for the rapid detection of the gene recombinant calluses. Absorption spectra of 349 calluses (concentration range: 126.0 mg L - 1 -2697 mg L - 1 ; standard deviation: 646.3 mg L - 1 ) were measured by a hyperspectral camera (wavelength range: 400 nm-1000 nm; resolution: 9 nm). The nitrate concentration of the calluses was measured by the RQ-Flex method. Mathematical models to estimate the nitrate concentration in the calluses from the absorption spectra were developed using the principal component regression (PCR) and partial least squares (PLS) methods, and the correlation coefficient between the measured and estimated nitrate concentration was found to be 0.7363. The standard errors of calibration ( SEC ) and prediction ( SEP ) of the model were 430.3 mg L - 1 and 438.7 mg L - 1 , respectively.","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"123 16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Ishii, L. Okushima, Hideki Moriyama, Yasunaga Furihata
{"title":"Influence of Circulation Fans on the Distribution of Air Temperature and Air Velocity in a Greenhouse","authors":"M. Ishii, L. Okushima, Hideki Moriyama, Yasunaga Furihata","doi":"10.2525/SHITA.24.193","DOIUrl":"https://doi.org/10.2525/SHITA.24.193","url":null,"abstract":"This paper shows how airflow and air temperature distribution in a greenhouse are influenced by the number and position of circulation fans. As a first measure, the influence of air movement produced by a circulation fan on the distribution of airflow was examined in greenhouses with no plants and tomato plants at the harvest stage of development. The air velocity measured at 2 m from the center of the fan was 6.04 m s-1 in an empty greenhouse. In general, the air velocity decreased with an increase in distance from the fan. The air velocity measured at 22 m from the fan was 0.33 m s-1 in the empty greenhouse. Moreover, the fully developed tomato plants caused a large decrease in air velocity, for example the air velocity measured at 22 m from the fan was 0.04 m s-1. As a second measure, the influence of different combinations of fan positions and numbers of fans was investigated in a greenhouse with fully developed tomato plants. At the top of the tomato canopy, the air velocity increased with an increase in the number of fans. However, the air velocity decreased at the bottom of the tomato canopy. These results indicate a gradual decrease in airflow on the leeward side caused a non-uniform air temperature distribution in the greenhouse. On the other hand, when the fans were set at 5, 10 and 15 per 1000 m2, the measured average air velocities were 0.24, 0.36 and 0.44 m s-1, respectively. Therefore, we conclude that 10-15 fans per 1000 m2 are necessary to produce an average air velocity of 0.3 m s-1, when a fully developed crop is in the greenhouse.","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132484191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Relationship Between Changes of Gas Composition and Morphogenesis in Shoot Culture of Potato","authors":"S. Takayama, Y. Yamaguchi, N. Mera","doi":"10.2525/SHITA.24.38","DOIUrl":"https://doi.org/10.2525/SHITA.24.38","url":null,"abstract":"自然通気および密閉条件でジャガイモのシュート培養を試みた. その結果, 密閉条件では培養容器内のガス組成はエチレンおよびCO2が高濃度に蓄積し, O2は緩やかに減少した. シュートのエチレン生成能は自然通気区と差がなかった. 高濃度のエチレンは密閉によって生成に影響を受けることなく, 単に培養容器内に蓄積した結果であった. 生育したシュートは節間が短く, 側枝および葉が増加し, 痕跡状の葉を形成した. これら変化はガス組成の影響であると考えられる.","PeriodicalId":315038,"journal":{"name":"Shokubutsu Kankyo Kogaku","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125524466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}