論文 - 渡邉 文雄
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Preliminary study on improvement of soil water retention characteristics by Spirulina
SUZUKI Shinji, WATANABE Satoru, WATANABE Fumio, SHIMDA Sawahiko
Journal of Arid Land Studies 32 ( 3 ) 68 - 68 2022年12月
記述言語：英語 出版者・発行元：The Japanese Association for Arid Land Studies
<p>Spirulina is a planctonic blue-green algae classified as cyanobacteria, which inhabits strongly alkaline water body in the tropics and subtropics. Further, the microalgae including the spirulina secretes Extracellular Polymeric Substances (EPS). Since the improvement of the soil water retention characteristics is necessary for desert greening and prevention of desertification in arid and semi-arid area, the current study aims to study on the effect of application of the spirulina and the spirulina derived EPS on the improvement of water retention characteristics of soils.</p><p>Three different types of soil were used. One is Toyoura sand, and the others are collected from Kourimalei and Ali-fareen, Djibouti. The texture of those soils were Sand, Silty Loam, and Sandy Loam, respectively. For those soils, 0.5 and 1.0% by mass of the spirulina powder and 1.0% by mass of the EPS powder were treated respectively. A significant increase in the readily available water content for crop growth was observed under both the spirulina and the EPS treatments for the Toyoura sand. Although further research is required, it is suggested that the effect of the application of the spirulina and EPS on the soil water retention depends on the texture.</p>
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Meteorological characteristics with the windbreak effect evaluation of hedgerows in agricultural lands of Djibouti on the basis of wind dynamics simulation
IRIE Teruaki, SAITO Shuhei, SUZUKI Shinji, WATANABE Fumio, SHIMADA Sawahiko, BARKAD Hassan A.
Journal of Arid Land Studies 32 ( 3 ) 105 - 105 2022年12月
記述言語：英語 出版者・発行元：The Japanese Association for Arid Land Studies
<p>The purpose of this study is to clarify the meteorological characteristics of a farm at Dikhil in Djibouti and to evaluate the windbreak effect of the hedgerows in order to utilize the results to plan and design of a pilot farm in Ali Faren on the basis of simulated wind dynamics from meteorological observation parameters. From the results of Dikhil farm land meteorological observation, the highest temperatures and the lowest relative humidity were observed from May to July, and the southerly prevailing wind from May to September, with the east-northeast prevailing wind from October to April were observed. The east-northeast winds during October to April was discovered to be twice stronger than the southerly winds during May to September season. As a result of the wind dynamics simulation on the inflow from east-northeast at a height of 3 m above the ground level, the windbreak effect of the hedgerows (the 2 rows of <i>Leucaena leucocephala</i> with a height of 2 m, the <i>Phoenix dactylifera</i> with a height of 6-7 m) on the leeward side was confirmed to be effective. The vegetable fields in the farm will be protected from the wind on the leeward side of the hedgerows. From the Ali Faren pilot farm observation, the south-southeast prevailing winds throughout the year. As a result of the wind dynamics simulation on the inflow from south-southeast at a height of 3 m above the ground, the windbreak effect of several scenarios of the hedgerows plan of the Ali Faren pilot farm was confirmed to be effective. The several scenarios of the hedgerows plan on the basis of wind dynamics simulation is useful for consensus building and decision making with local farmers, agriculture ministry, universities, etc. on the farmland structure and layout designings.</p>
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Estimating irrigation water amounts for tomato cultivation using observed meteorological data in Djibouti
WATANABE Fumio, SUZUKI Shinji, MOHAMED Tabarek Ismael, JITSUNO Masataka, OHSHIMA Hiroyuki, SANADA Atsushi, SHINOHARA Takashi, ABDALLAH Abdillahi Houssein
Journal of Arid Land Studies 32 ( S ) 95 - 99 2022年12月
記述言語：英語 出版者・発行元：The Japanese Association for Arid Land Studies
<p>Irrigation is essential for crop cultivation in arid and semi-arid areas with limited rainfall and water resources. Efficient and effective use of water resources is required and saving irrigation water is important. Djibouti is a very dry region with annual rainfall of about 150 mm and an average annual temperature of 28.6°C. Due to such meteorological conditions, water resources depend mostly on groundwater, and this makes water extremely scarce. Therefore, water saving in agricultural sector is indispensable. This study aims at promoting effective and efficient use of irrigation water in Djibouti. The appropriate irrigation water amounts for tomato cultivation were estimated using CROPWAT provided by FAO and observed meteorological data at Ali Farren farm in Djibouti. The conditions required for calculating the amounts of irrigation water were medium loam soil based on the laboratory results of soil particle size test, and the tomato cultivation period from October to March according to the local farmers. The result showed that the average monthly reference evapotranspiration was 5.7 mm/day annually. Reference Evapotranspiration was maximum in July and August with 8.4 mm/day and minimum in December with 4.6 mm/day. The amount of irrigation water from October to March was about 476 mm which corresponds to the local tomato cultivation period.</p>
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Verification of availability of GSMaP rainfall data based on the comparison of observed rainfall data in Africa 査読あり
Yukimitsu KOBAYASHI, Fumio WATANABE, Shinji SUZUKI, Okiria EMMANUEL, Tom KANYIKE
沙漠研究 28 ( S ) 85 - 88 2018年
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
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Optimal water use on low pressure drip irrigation system for tomato cultivation in Uganda 査読あり
Bwire DENIS, Fumio WATANABE, Shinji SUZUKI, Satoshi KUGA
沙漠研究 28 ( S ) 77 - 80 2018年
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
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Determining the effective Eucalyptus leaves heating temperature that triggers water repellency using medium sand and soil from Kisima area of Samburu, Kenya 査読あり
Samuel Kipkemoi KIRUI, Fumio WATANABE, Shinji SUZUKI, Ryusei SOUMA
沙漠研究 28 ( S ) 173 - 176 2018年
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
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Comparison of root distribution pattern betwwen Gramieae and legume species under various soil and climtae condition 査読あり
Shinji Suzuki, Yukimitsu Kobayashi, Fumio Watanbabe, Daichi Nakagawa, Taisuke Izumikawa
沙漠研究 28 ( S ) 189 - 192 2018年
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Estimating optimum irrigation discharge under furrow irrigation in Afghanistan 査読あり
Shams, H. k., Fumio Watanabe, F., Suzuki, S., and Kimura, M.
東京農業大学農学集報 60 ( 4 ) 219 - 224 2016年03月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
本論文は、アフガニスタンの首都カブール市の国立農業試験場でトマトの畦間灌漑において、給水量の最適水量を現場水足試験から検討したものである。結果、現行のトマトの灌漑水量に対し、1haあたりで約1トンの灌漑水の節約が可能であることを明らかにした。
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Estimating pan evaporation in Kabul, Afghanistan. 査読あり
Shams, H. K., Watanabe, F., Suzuki, S., Takahashi, S., and Kashino, M.
沙漠研究 23 ( 4 ) 167 - 172 2014年03月
担当区分：責任著者 記述言語：英語 掲載種別：研究論文（学術雑誌）
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ジブチにおけるWorldView-2およびLandsat-8を用いた流域地表面情報収集 査読あり
島田沢彦，ファドモ A マロウ，堀田朋樹，毛受享政，広兼達也，鈴木伸治，渡邉文雄，豊田裕道
沙漠研究 23 ( 4 ) 247 - 250 2014年03月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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東アフリカ乾燥地における雨水・植生等の地域資源有効利用の試み－東京農業大学戦略研究プロジェクトの概要－ 査読あり
豊田裕道，島田沢彦，鈴木伸治，橘隆一，真田篤史，広兼達也，田島淳，渡邉文雄
沙漠研究 23 ( 4 ) 229 - 233 2014年03月
担当区分：責任著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Effectiveness of Solar Pumping System in the Wazi Agriculture in Northern East Africa 査読あり
Tajima K., Sanada A., Tachibana R., Watanabe F.
沙漠研究 23 ( 4 ) 179 - 183 2014年03月
記述言語：英語 掲載種別：研究論文（学術雑誌）
ジブチ共和国のワジ沿いで実施されている浅層地下水を利用して行われている灌漑農業農家で利用されている水中ポンプの利用状況を詳細に調査したデータに基づいて、エネルギーフローを定量化を試みた研究である。
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鉄穴流し水田棚田の景観特性 査読あり
高橋悟, 鈴木伸治, 渡邉文雄, 宇野和男, 高尾昭浩
食農と環境 ( 12 ) 95 - 105 2013年09月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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地表面近傍での地中熱流量の測定における温度勾配法と熱流板法の比較および貯熱の影響
鈴木伸治，飯塚圭子，渡邉文雄，島田沢彦，高橋悟
土壌の物理性 124 35 - 42 2013年07月
担当区分：責任著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
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客土により造成された枠畑圃場の土壌硬度，保水性および排水性 査読あり
鈴木伸治，渡邉文雄，高橋悟，三井ともみ，飯塚圭子，邵莉
東京農業大学農学集報 58 ( 1 ) 13 - 20 2013年06月
記述言語：日本語 掲載種別：研究論文（大学，研究機関等紀要）
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エチオピア半乾燥地域におけるネリカ栽培の可能性
真田篤史，鈴木伸治，中村謙仁，渡邉文雄，高橋久光，高橋悟
沙漠研究 22 ( 2 ) 391 - 395 2012年09月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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水利用からみたウガンダの風土特性とネリカ栽培における課題 査読あり
後藤明生，鈴木伸治，渡邉文雄，西牧隆壯，高橋悟
沙漠研究 22 ( 2 ) 403 - 407 2012年09月
担当区分：責任著者 記述言語：日本語 掲載種別：研究論文（学術雑誌）
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アフリカ乾燥地における農業の現状・課題と解決への展開 査読あり
高橋悟，鈴木伸治，真田篤史，橘隆一，渡邉文雄
農業農村工学会誌 80 ( 8 ) 633 - 636 2012年08月
記述言語：日本語 掲載種別：研究論文（学術雑誌）
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Application example of the small solar pumping system in the Djiboutian wadi agriculture
Tajima, K., Suzuki, S., Shinohara, T., Sanada, A., and Watanabe, F.
沙漠研究 22 ( 1 ) 337 - 340 2012年06月
記述言語：英語 掲載種別：研究論文（学術雑誌）
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Estimating the volume of surface runoff from in situ measured soil sorptivity 査読あり
Watanabe, F., Kobayashi, Y., Suzuki, S., Hotta, T., and Takahashi, S.
沙漠研究 22 ( 1 ) 95 - 98 2012年06月
担当区分：筆頭著者 記述言語：英語 掲載種別：研究論文（学術雑誌）