1.

論文(リポジトリ)

論文(リポジトリ)
Guan, Senlin ; Nakamura, Morikazu ; Shikanai, Takeshi ; Okazaki, Takeo
出版情報: Computers and Electronics in Agriculture.  66  pp.181-190,  2009-05.  Elsevier
URL: http://hdl.handle.net/20.500.12000/37227
概要: This paper proposes a resource assignment and scheduling based on a two-phase metaheuristic for a long-term cropping schedule. The two-phase metaheuristic performs the optimization of resources assignment and scheduling based on a simulated annealing (SA), a genetic algorithm (GA) and a hybrid Petri nets model. The initial and progressive states of farmlands and resources, moving sequence of machinery, cooperative work, and deadlock removal have been well handled in the proposed approach. In the computational experiment, the schemes of emphasizing the resource assignment optimization, initializing the population of the GA with chromosomes sorted by the waiting time, and inheriting the priority list from tasks in the previous resources assignment improved the evolution speed and solution quality. The simulated result indicated that the formulated schedule has a high ratio of resource utilization in sugarcane production. The proposed approach also contributes a referential scheme for applying the metaheuristic approach to other crop production scheduling. 続きを見る
2.

論文(リポジトリ)

論文(リポジトリ)
上野, 正実 ; 川満, 芳信 ; 菊地, 香 ; 岡安, 崇史 ; Ueno, Masami ; Kawamitsu, Yoshinobu ; Kikuchi, Koh ; Okayasu, Takashi
出版情報: 2006-03.  上野正実
URL: http://hdl.handle.net/20.500.12000/12348
概要: 平成16年度~平成17年度科学研究補助金(基盤研究(B))研究成果報告書<br />研究概要:サトウキビの精密栽培システムを確立するために,対象物-センサ間距離を階層的に変化させて可視域から近赤外域までの"光センシング "技術を適用した。 1)接触計測:サトウキビの栄養診断に必要な葉内のN, C, P, K, Mg, Ca,水分などの成分を分光反射・吸光度特性によって迅速に計測する光センシング技術,特にNIR解析技術を開発した。生育段階の個葉について継続的に栄養成分を計測し,検量線の精度が十分にあることを確認した。さらに,茎の細裂試料および搾汁液についても同様の分析を行い,測定可能な栄養構成成分を明らかにした。 2)近接計測:野外観測用可視・近赤外分光装置を用いてサトウキビ葉身の分光反射特性を350nm-2500nmの範囲で測定を行い,水ストレスや窒素養分による分光反射特性の違いを検討した。 3)近距離計測:階層的センシングの一方法として期待される低空からの観測の可能性について検討するために,南大東島でサトウキビ圃場の生育状況の画像を取得した。この画像によってサトウキビの生育状況および雑草などの繁茂状態を詳細に分析できることが明らかになった。 4)中距離計測:ハイパースペクトル画像を取得し,ピクセル単位で栄養成分を求める手順を自動化し,実用的なスケールを模索する手順をまとめた。 5)遠距離計測:高解像度画像QuickBird衛星画像およびIKONOS衛星画像を利用し,北大東島・南大東島の圃場地図の作成,NDVI(植生指数)の解析,かんがい施設の配置状況の解析を行った。これらの結果は圃場地図に地理情報システム(GIS)を用いてマッピングした。 6)これらの結果に基づいて測定対象物と光センサとの距離と測定可能な成分および測定精度との関係を検討した。 7)補完的計測:北大東島に設置した気象観測ロボット3基からのモニタリングデータを用いて圃場の蒸発散量など推定し,光センシング結果との比較を行った。<br />研究概要:Optical sensing methods were applied with varying the sensor-target object distance in order to establish the precise cultivation system for sugarcane as follows. 1)Contact measurement : The optical sensing especially NIR measurement techniques were developed using the properties of reflection and absorption spectra data for the diagnosis of sugarcane nutrition. The contents of N, C, P, K, Mg, Ca and water could be measured with good agreement. Calibration equations satisfied enough accuracy by the sequential measurements of sugarcane leaves in the various growing stages. NIR measurement was carried out not only shredded sugarcane samples but extracting juice samples, and then the measurable components were clarified. 2)Close range measurement : The spectrum data of cane leaves were measured with the wavelength range from 350nm to 2500nm using a portable spectrometer. The degrees of water stress and nutrition were availably detected by the spectrum data. 3)Short distance measurement : The feasibility study was carried out to check whether the small size unmanned helicopter was useful or not for the sensing of growing conditions from short distance. Some images of sugarcane field were taken and processed in Minami-Daito Island. The growing conditions were observed well. 4)Intermediate distance measurement : The image processing methods by a hyper spectrum camera were investigated to detect the nutrition condition of sugarcane field. 5)Long distance measurement : High-resolution satellite images by QuickBird and IKONOS were applied to field map drawing, NDVI analysis and others in Minami-Daito and Kita-Daito Islands. The mapping was carried using the results. 6)Complementary measurement : Three sets of robotic weather station were placed in Kita-Daito Island, and weather data were collected. Evapo-transpiration was estimated and compared with the remote sensing data. Finally, the relations of the measurement distance and measurable components and accuracy were discussed.<br />未公開:P.50~P.94、P.145~P.152(別刷論文のため) 続きを見る
3.

論文(リポジトリ)

論文(リポジトリ)
川満, 芳信 ; 木永, 泰山 ; 上野, 正実 ; 小宮, 康明 ; 平良, 栄三 ; 松田, 昇 ; Kawamitsu, Yoshinobu ; Kinaga, Yasutaka ; Ueno, Masami ; Komiya, Yasuaki ; Taira, Eizou ; Matsuda, Noboru
出版情報: 琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.1-6,  2003-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/3590
概要: In this paper, as basic research on the development of nondestructive analysis equipment for nutritional diagnosis and quality assessment in crops, the absorption spectrum of mango fruit was measured using a near infrared radiation (NIR) and the calibration curve was made, and finaly the wavelength was determined as for measurement of fruit sugar content. In addition, photosynthetic rate, transpiration rate, and water potential of the leaf was measured using the pot-cultivating sugarcane plants under water stress conditions, then the calibration curve were developed in order to estimate such physiological parameters in the field using the NIR. 続きを見る
4.

論文(リポジトリ)

論文(リポジトリ)
川満, 芳信 ; シン, クマー ; ブア, ネルソン ; 玉城, 雄一 ; 村山, 盛一 ; Kawamitsu, Yoshinobu ; Singh, Ram Kumar ; Nelson, Buah J. ; Tamaki, Yuichi ; Murayama, Seiichi
出版情報: 琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.1-14,  1999-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/3659
概要: サトウキビはC_4型光合成経路を有し, 光合成からみた窒素利用効率は極めて高いと云われる。本研究では, サトウキビの成長と光合成速度に与える窒素処理の影響を調べた。処理は水耕液中に含まれる窒素源としての硝酸アンモニウム(NH_4NO_3)の 濃度を6段階に分け, 与えた。葉の窒素含量は処理濃度に比例して増大した。ON区の葉の窒素含量は0.81%で, 2N区のそれは2.28%であった。また, 草丈, 葉数も窒素処理濃度が上昇するにつれ増大した。処理開始後104日目に比較したところ, ON区の草丈は2N区の約半分であった。光合成速度及び蒸散速度の最大値は2N区で見られ, 最小値はON区ではなく1/3N区で認められた。1N区の葉身を用いて葉の各部位の窒素含量を比較したところ, 葉身上部が基部に比較して高く, 中肋は葉鞘とほぼ同じであった。SPADとクロロフィル含量との間には, 極めて高い正の相関関係が認められた。しかし, 両者間の回帰式の傾きは葉位によって異なり, サトウキビの葉にSPADを用いる場合, 注意を要する。光-光合成曲線に対する窒素含量の影響を調べたところ, 低窒素区では飽和型に, 高窒素区では不飽和曲線となった。ON区の最大光合成速度は2N区のものに匹敵し, 窒素を与えていないにも関わらず高い値を示した。<br />The objective of the present study is to demonstrate the effects of applied nitrogen concentration on the uptake pattern and composition in different parts and investigate the relationship between uptake and physiological activities. We measured leaf number, plant height, leaf nitrogen content, chlorophyll content, and gas exchange rates. Nitrogen concentrations of the six nitrogen levels (0,1/6,1/3,1/2,1 and 2N) were prepared as 0,1.5,3,4.5,9 and 18ml per liter of NH_4NO_3 in nutrient solution. The all parameters measured were increased with increasing levels of nitrogen concentration up to twice of the control. Highest values at 104 days after transplanting in the number of fully expanded leaves, the total leaf number, and plant height, which were observed in the plants grown with 2N solution, were 12,14.2,and 209cm, respectively. The nitrogen content, SPAD, photosynthesis, and transpiration rates were increased with successive increase in the nitrogen concentration of nutrient solution from 0 to 2 times of the control. The leaf nitrogen content, SPAD, photosynthesis and transpiration were highest in the plant grown with 2N solution and these were 2.28,39.25,29.78 and 3.04,respectively. Nitrogen content in the leaf sheath, mid rib, blade of younger fully expanded leaf of the plant grown with the solution of normal nitrogen concentration were analyzed. The results showed that leaf blade contain highest nitrogen followed by mid rib and sheath. Concentration of nitrogen was higher in top portion as compared with the base. Nitrogen content was highest in the 6th leaf (2.11%), followed by the 5th leaf (2.03%). It might be due to more actives of younger fully expanded leaf, besides these nitrogen concentrations. The 6th leaf from tip recorded maximum leaf nitrogen content, whereas the 5th leaf showed highest SPAD, photosynthesis and transpiration rates. Leaf nitrogen content showed a positive correlation with SPAD and photosynthesis indicating that nitrogen is the dominating factor on these parameter. In the present studies, 3rd leaf from tip, which is younger fully expanded leaf, indicated the higher photosynthetic nitrogen use efficiency, followed by 2nd and 4th leaf. The optimum temperature of photosynthesis was higher at the 2070 μ mol photons m^<-2> s^<-1> of PFD and lowering at 455 μmol photons m^<-2> s^<-1> of PFD. The optimum temperature of photosynthesis was not shifted with nitrogen levels as seen at different PFD. The maximum photosynthetic rate with 0N plants was higher than those of 1/6 and 1/3N plants. In addition, initial slope of the light dependent photosynthetic curves in 0N plants was also higher than those in 1/6N and 1/3N plants. 続きを見る
5.

論文(リポジトリ)

論文(リポジトリ)
比屋根, 真一 ; 川満, 芳信 ; 村山, 盛一 ; Hiyane, Shinichi ; Kawamitsu, Yoshinobu ; Murayama, Seiichi
出版情報: 琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.1-7,  1998-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/3678
概要: Saccharum officinarumのBadilaと栽培品種であるS.spp.のNiF8を用いて, 葉面飽差の違いがサトウキビの光合成特性に及ぼす影響について検討した。葉面飽差の上昇に対し, 両種共に光合成速度の低下は認められず, 蒸 散速度は両種共に直線的に上昇した。気孔伝導度においては葉面飽差の上昇に伴いNiF8では直線的に, Badilaでは25mb付近まで直線的に低下し, その後, 定常値に達した。葉内CO_2濃度は, 葉面飽差の上昇にともない直線的に低下し, 両種間に差はなかった。次に, 葉面飽差が葉内要因に与える影響を検討するため, 異なる葉面飽差下でCi-光合成曲線とその初期勾配である炭素固定効率, および光-光合成曲線の初期勾配である光利用効率を求め検討した。その結果, 高葉面飽差下で炭素固定効率, 光利用効率は低下した。しかし, これらは統計的に有意な差とは言えなかった。葉面飽差が葉の水ポテンシャル, 浸透ポテンシャル及び圧ポテンシャルに与える影響を検討したところ, 葉面飽差が大きく変化したにも関わらず, 各ポテンシャルは変化せず, その値はそれぞれ-0.23,-0.87,0.64MPaであった。<br />This paper described that the effects of leaf-to-air vapor pressure difference (VPD) on photosynthesis, transpiration, leaf conductance and leaf water potential in Saccharum species (S. ssp. cv. NiF8 and S. officinarum cv. Badila), C_4 plants have been well-known a having strong resistance to VPD as compared with C_3 plants. In addition, we determined the carboxylation efficiency, obtained from the initial slope of the A/Ci curve, and apparent quantum yield, acquired from the initial slope of photosynthetic light response curve at different VPD conditions. The results indicated that there were no changes in photosynthesis and leaf water potential in sugarcane used with increasing VPDs. Transpiration rate was increased linearly with increasing VPD. Leaf conductance and internal CO_2 concentration were decreased with increasing VPD. The carboxylation efficiency and apparent quantum yield were decreased at high VPD, suggesting that photosynthetic activities were damaged at the high evaporation demands. However, there was no statistic significance between VPD treatments. Leaf water potential, osmotic potential and pressure potential were not altered at different VPD. It was suggested that the decreases in leaf conductance at high VPD were attributed to the direct responses of stomata to VPD. 続きを見る
6.

論文(リポジトリ)

論文(リポジトリ)
比屋根, 真一 ; 川満, 芳信 ; 村山, 盛一 ; Hiyane, Shinichi ; Kawamitsu, Yoshinobu ; Murayama, Seiichi
出版情報: 琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus.  pp.9-15,  1998-12-01.  琉球大学農学部
URL: http://hdl.handle.net/20.500.12000/3679
概要: サトウキビ7品種・系統を用いて,Ci-光合成曲線によるサトウキビ葉身の光合成速度の支配要因を解析した。Ci-光合成曲線から, CO_2補償点, 炭素固定効率(初期勾配), 大気CO_2条件の光合成速度と気孔伝導度, 飽和段階(800ppm以 上)の光合成速度, および光-光合成曲線の初期勾配から光利用効率を求め, それぞれの相関関係を検討した。品種・系統間で比較した場合, 大気CO_2下の光合成速度, 飽和段階の光合成速度および光利用効率に統計的な有意差が認められた。大気CO_2下における光合成速度に対し各種モデル式を用いて解析したところ, 光化学系電子伝達および光合成産物蓄積に伴う無機リン酸の再生能力が気孔伝導度および炭素固定系活性に比べて制限程度は高かった。これより, 大気CO_2下では, 前者の要因が光合成速度を著しく律速していると考えられた。大気CO_2下の光合成速度と各関連要因との相関行列から, 光利用効率, 葉緑素含量および窒素含量との間に正の相関関係が認められ, 葉身窒素が光化学系に影響を与えていることが示唆された。<br />This paper described that the limiting factors to photosynthesis were analyzed with using A/Ci curves model in Saccharum species. We listed up the characters relating photosynthesis such as CO_2 compensation point, carboxylation efficiency, maximum photosynthesis at saturation, leaf conductance, and apparent light energy use efficiency. There was statistically significant difference between species or varieties in photosynthesis at atmospheric CO_2 concentration (350ppm). The photosynthesis was regulated mainly with a energy transport system and pi limitation caused by photosynthate storage in cell rather than leaf conductance and carboxylation efficiency. In addition, leaf nitrogen seems to affect the photochemical reaction process, and then finally to CO_2 fixation process. 続きを見る
7.

論文(リポジトリ)

論文(リポジトリ)
Uddin, S. M. Moslem ; Murayama, Seiichi ; Ishimine, Yukio ; Tsuzuki, Eiji ; Harada, Jiro ; ウデイン, S. M. モスレム ; 村山, 盛一 ; 石嶺, 行男 ; 続, 栄治 ; 原田, 二郎
出版情報: 日本作物学会紀事 = Japanese Journal of Crop Science.  64  pp.747-753,  1995-12.  日本作物学会 — The Crop Science Society of Japan
URL: http://hdl.handle.net/20.500.12000/4887
概要: An experiment was conduced to study the effects of a mixture of charcoal with pyroligneous acid (charcoal 4 : pyroligneo us acid 1 ; Sannekka E) on dry matter production and root growth of summer planted sugarcane. Sugarcane variety NCo310 was tested against four levels of Sannekka E (SE) ; 0 (control), 200, 400, and 800 Kg 10a^<-1> and the experiment was laid out in a randomized complete block design with five replications. Yield contributing characters, such as stalk number, stalk length, stalk diameter and sugar content in stalks were increased by application of SE. Values of CGR, NAR and LAI of SE treated crops were higher in comparison to those of the controls. The correlation coefficients between CGR and NAR, and CGR and LAI were significant. The yield of cane stalks, sugar and total dry matter content in SE treated plots had been increased by 13-24%, 19-31% and 14-20%, respectively, over the controls. The highest cane stalk yield (11.4 kg m^<-2>), sugar yield (1.95 kg m^<-2>) and total dry matter content (4.4 kg m^<-2>) were obtained by the application of SE of 400 kg 10a^<-1>. Root content in unit soil cover depths was higher in SE treated plots.<br />木酢液・木炭混合物(サンネッカE)が夏植サトウキビの乾物生産および根の生育に及ぼす影響を明らかにするために、サトウキビ品種Nco310を供試し、サンネッカE施用量を0(対照区)、200、400および800kg/10aの4水準設定して5反復で実験を実施した.その結果、サンネッカE施肥により茎重、茎長、茎径、糖含量等のサトウキビの収量構成要素が増大した.サンネッカE施用区におけるCGR、NARおよびLAIは対照区より高い値を示し、CGRとNARおよびLAIの相関は有意であった.原料茎収量、蔗糖収量および全乾物重もサンネッカE区が対照区よりそれぞれ13-24%、19-31%および14-20%増加した.また、原料茎収量、蔗糖収量および全乾物重の最高値は400kg/10aサンネッカE区で得られた.サンネッカE区の根系の分布は水平方向、垂直方向とも各分布域における根重密度はサンネッカE区が高かった. 続きを見る
8.

論文(リポジトリ)

論文(リポジトリ)
Uddin, S.M.Moslem ; Murayama, Seiichi ; Ishimine, Yukio ; Tsuzuki, Eiji ; ウディン, S.M.モスレム ; 村山, 盛一 ; 石嶺, 行男 ; 続, 栄治
出版情報: 熱帯農業 = Japanese Journal of Tropical Agriculture.  38  pp.281-285,  1994-12-01.  日本熱帯農業学会 — Japanese Society for Tropical Agriculture (JSTA)
URL: http://hdl.handle.net/20.500.12000/5007
概要: By the application of a mixture of charcoal with pyroligneous acid (charcoal 4: pyroligneous acid 1; Sannekka E, Miyazak i Midori PHARMS....IMC), the stalk number and length surpassed those of the control plots in both spring and ratoon crops, and the total dry matter weight and cane yields at the final farvest were significantly higher in the ratoon crops. The sugar content and yield of the Sannekka E (SE) treated crops were much higher than those of the control crops in both cropping types. CGR and LAI showed significant changes throughout the growth stages by SE application. The highest stalk and sugar yields were obtained by the application of SE of 400 kg/10a in both cropping types. Therefore, it is suggested that SE application affects significantly cane and sugar yields.<br />本実験は木酢液と木炭の混合物(木酢液1 : 木炭4、以下、サンネッカEと略称)が春植及び株出サトウキビの乾物生産、原料茎及び蔗糖収量に及ぼす影響を明らかにすることを目的とした.実験はサンネッカE施用量の異なる4水準、すなわち0(対照区)、200、400及び800Kg/10a施用区を設けて、4反復の乱塊法で実施した.供試品種には、沖縄県の代表的奨励品種であるNCo310を用いた.結果は以下の通りである.1.春植及び株出サトウキビとも茎数、茎長は対照区よりサンネッカE施用区で大きい値を示した.また、収穫時の全乾物重では株出で対照区に比較して施用区の値が有意に高い値を示した.2.原料茎収量、蔗糖収量ともサンネッカE施用区が対照区に比較して高い値を示し、春植の蔗糖収量、株出の原料茎収量及び蔗糖収量では有意であった.3.株出区を対象に実施した生長解析の結果、CGR、NAR、LAIのいずれにおいてもサンネッカE施用区が対照区より高い値を示した.4.以上の事から、木酢液と木炭の混合物であるサンネッカEはサトウキビの原料茎及び蔗糖収量の両者を向上させる効果があると考えられた. 続きを見る
9.

図書

図書
edited by Don J. Heinz
出版情報: Amsterdam ; Tokyo : Elsevier, 1987
シリーズ名: Developments in crop science ; 11
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10.

図書

図書
Frank Blackburn
出版情報: London ; New York : Longman, 1984
シリーズ名: Tropical agriculture series
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