石垣 元気 (イシガキ ゲンキ)

ISHIGAKI Genki

写真a

所属

農学部 農学部門動植物資源生命科学領域 附属次世代農学教育研究センター

職名

准教授

外部リンク

関連SDGs


学位 【 表示 / 非表示

  • 博士(農学) ( 2010年3月   宮崎大学 )

研究分野 【 表示 / 非表示

  • 環境・農学 / 作物生産科学

  • 環境・農学 / 遺伝育種科学

 

論文 【 表示 / 非表示

  • Agronomic performance, biomass production, and nutrient value of three napier grass cultivars (Pennisetum purpureum) in highland area 査読あり 国際共著

    Sidik Prasojo Y., Pastawan V., Prasetyo B., Kamal M., Khoirul Anwar M., Prastyo R.A., Iqbal Faruqi M., Ishigaki G.

    BIO Web of Conferences   155   2025年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BIO Web of Conferences  

    The study aims to determine the agronomic performance, biomass production, and nutrient value of three Pennisetum purpureum cultivar (Biovitas, Pakchong, and Mott) in 1000 meters above sea level (asl) highland area of Petungkriyono, Pekalongan, Central Java, Indonesia. The grasses were planted using vegetative stems and maintained for four months, following completely randomized design (CRD) with four replications for each cultivar. Agronomic performance was assessed before harvested. Napier grass was harvested to investigate the biomass production and nutrient values, including organic matter, crude protein, crude protein yield, crude fibre, and crude fat. Pakchong had the highest biomass and crude fiber content. Biovitas exhibited the highest agronomic performance, with superior plant height, leaf length, leaf width, and stem diameter, as well as the highest nutrient values in term of organic metters. Mott showed the highest tiller number and crude protein content among the cultivars. The distinct strength of each cultivar indicates their potential suitability for various agricultural applications in highland regions.

    DOI: 10.1051/bioconf/202515501022

    Scopus

  • 黄色灯照射が飼料用トウモロコシの生育段階の推移に及ぼす影響 査読あり

    石垣 元気, 安達 鉄矢

    日本草地学会誌   70 ( 4 )   180 - 184   2025年1月

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    担当区分:筆頭著者, 責任著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:日本草地学会  

    A physical control technique that irradiate yellow lights at night has been developed to suppress moth species. However, the effects of this method on the fall armyworm (<i>Spodoptera frugiperda</i>) and the growth of maize (<i>Zea mays </i>L.) are unclear. Therefore, this study, for two years, investigated the effects of yellow light irradiation on the growth stages of maize, which is significantly damaged by the fall armyworm. In the first year (2021), yellow lights were set up at the edge of a maize field (second cropping season) after sowing (25th August) and irradiated at night time until harvest (29th October). The growth stage of maize was investigated at 51, 59, and 65 days after sowing. The results indicated that yellow light irradiation retarded the growth of maize after the reproductive growth stage, and the degree of retardation depended on the irradiation intensity and distance. In the second year (2022), the timing of yellow light irradiation, which did not cause growth retardation, was examined. The results showed that yellow light irradiation from sowing to the 5-6 leaf stage did not retard growth retardation after the reproductive growth stage; however, light irradiation from sowing to the 9-10 leaf stage and the later stage retarded growth.

    DOI: 10.14941/grass.70.180

    CiNii Research

  • Yield, silage quality, and feeding preference of late-summer sown pearl millet (Cenchrus americanus (L.) Morrone) in Southern Kyushu 査読あり

    Ishigaki G., Niimi M., Shigedomi H., Sasaki Y., Idota S., Ishii Y.

    Grassland Research   3 ( 4 )   364 - 372   2024年12月

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:Grassland Research  

    Background: Pearl millet is characterized by its high dry matter (DM) yields with a high moisture content, which makes it difficult to process as silage. Methods: Pearl millet was sown in mid-September for 3 years to examine its growth, DM yields in early December, and decrease in DM percentage after frost exposure. The crop was processed as round-bale silage to assess silage quality and preference by breeding beef cattle. Results: Plants reached a height of 160–200 cm, with heading tiller percentages of 50%–70% in early December. With frost exposure, DM percentage increased in leaves and panicles, followed by stems, reaching over 40%, 1 month after exposure. These increases were positively correlated with cumulative frost exposure. After frost exposure, in vitro DM digestibility and crude protein content declined while acid detergent fiber content increased. Repeated cafeteria feeding experiments showed a reduced preference for either pearl millet silage or Italian ryegrass hay. The silage showed moderate acidity at pH 4.73–5.40, with lactic acid at 0.58%–1.62% DM, acetic acid at 0.03%–0.10% DM, and negligible butyric acid, indicating a satisfactory quality. Conclusions: In Southern Kyushu, pearl millet sown in late summer can be processed into low-moisture round-bale silage in January, the year following sowing.

    DOI: 10.1002/glr2.12096

    Scopus

  • Fermentation Quality and Aerobic Stability of Silages from Forage Crops Mixed with Bamboo Silage in Southern Kyushu, Japan 査読あり

    Niimi M., Kurata M., Ishigaki G., Ishii Y.

    OnLine Journal of Biological Sciences   25 ( 1 )   125 - 133   2024年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:OnLine Journal of Biological Sciences  

    Underutilization of bamboo contributes to the degradation of woody environments in southern Kyushu, Japan. A novel approach to using bamboo involves processing it to finely ground silage, although this product has shown inferior digestibility and palatability compared to traditional forage crops. This study evaluated the chemical composition, fermentation quality, and aerobic stability of silages produced from Italian ryegrass, maize, and Rhodes grass mixed with 10% (v/v) bamboo silage, ensiled for 30-40 days. One-day wilted first-cut Italian ryegrass and Rhodes grass and direct-cut maize were finely chopped, mixed with bamboo silage at a 9:1 volume ratio, and vacuum-sealed in polyethylene bags, with control silages produced without bamboo addition. Digestibility tended to decrease in bamboo-mixed maize and Rhodes grass silages. The addition of bamboo silage resulted in a significant decrease (p<0.05) in pH by 0.45 in Italian ryegrass, a trend toward lower pH in Rhodes grass, and a tendency for pH to increase in maize. Fermentation quality was improved by the addition of bamboo silage in Italian ryegrass and Rhodes grass, with significant increases (p<0.05) in contents of lactic acid by 2.91% Dry Matter (DM) and acetic acid by 1.03% DM, respectively, contrasting with a trend toward reduced lactic acid content in maize. Aerobic stability, measured as the time to reach a temperature increase of >2°C above ambient, was highest in Italian ryegrass silage with bamboo, which maintained stability for more than 6 days after air exposure, compared to significant temperature rises detected at 15 and 29 h in maize and Rhodes grass silages, respectively. Fermentation quality, including pH, lactic acid, and acetic acid contents, was maintained in Italian ryegrass silage mixed with bamboo for a week after air exposure, while rapid deterioration was observed in maize and Italian ryegrass silages with and without bamboo silage addition. It is concluded that wilted Italian ryegrass mixed with 10% bamboo silage may enhance the handling efficiency of silage after opening silos in early June for the site in southern Kyushu, Japan.

    DOI: 10.3844/ojbsci.2025.125.133

    Scopus

  • Tiller Number and Flowering Ability on BC1F1 Progeny of Interspecific Hybridization in Ruzigrass (Urochloa ruziziensis) 査読あり 国際共著

    Sidik Prasojo Y., Nitthaisong P., Muguerza M., Kamphayae S., Umami N., Ishigaki G.

    BIO Web of Conferences   80   2023年12月

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    担当区分:最終著者   記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:BIO Web of Conferences  

    The objective of this study focusing on production BC1F1 progeny of interspecific hybridization in ruzigrass (Urochloa ruziziensis) were to evaluate potential of pentaploid BC1F1 hybrid for seed propagation by associating with their tiller number, flowering, and shattering ability. In addition, we evaluate the function of various nitrogen dose on vegetative stages. Eight different genotypes were examined: B. ruziziensis 'Kennedy', B. decumbens 'Basilisk', pentaploid BC1F1 line derived from B. ruziziensis and Mulato (RM), pentaploid BC1F1 line derived from diploid B. ruziziensis and tetraploid B. ruziziensis (RR), and pentaploid BC1F1 lines derived from B. ruziziensis and B. decumbens (RD 1-4). The experimental plants treated with three level of nitrogen fertilizer (0, 4, and 8 kg/10a). Compared with parental line, RM line had high tiller number along with increasing level of nitrogen. For the flowering and shattering ability, the first lines to flowered and shattered was the pentaploid BC1F1 (RD 1-4), RR, and B. decumbens. Pentaploid BC1F1 lines derived from B. ruziziensis and B. decumbens (RD 1-4) had potential for seed propagation by associating with their flowering and shattering ability, while pentaploid BC1F1 line derived from B. ruziziensis and Mulato (RM) had the potential biomass production and yield ability by associating with its tiller number production.

    DOI: 10.1051/bioconf/20238005003

    Scopus

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書籍等出版物 【 表示 / 非表示

  • 牧草と園芸:飼料用トウモロコシに対するツマジロクサヨトウ防除の取り組みについて

    石井康之、井戸田幸子、石垣元気( 担当: 共著)

    雪印種苗  2021年5月 

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    担当ページ:400-405   記述言語:日本語

  • 植調:暖地型イネ科牧草ウロクロア属草種の西南暖地への導入および栽培

    石垣元気( 担当: 単著)

    日本植物調節剤研究協会  2019年11月 

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    記述言語:日本語

  • 平成29年度食肉に関する助成研究調査成果報告書 西南暖地におけるイネ科牧草リビングマルチ体系による飼料用ダイズ生産技術の開発(Ⅱ)

    石垣元気・荒井昌和・福山喜一( 担当: 共著)

    公益財団法人伊藤記念財団  2017年11月 

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    担当ページ:400-405   記述言語:日本語 著書種別:調査報告書

  • 平成29年度食肉に関する助成研究調査成果報告書 西南暖地におけるイネ科牧草リビングマルチ体系による飼料用ダイズ生産技術の開発(Ⅱ)

    石垣元気, 荒井昌和, 福山喜一

    公益財団法人伊藤記念財団  2017年11月 

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    担当ページ:400-405   記述言語:日本語

    researchmap

  • 平成28年度食肉に関する助成研究調査成果報告書 西南暖地におけるイネ科牧草リビングマルチ体系による飼料用ダイズ生産技術の開発

    石垣元気・福山喜一( 担当: 共著)

    公益財団法人伊藤記念財団  2016年11月 

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    担当ページ:351-355   記述言語:日本語 著書種別:調査報告書

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講演・口頭発表等 【 表示 / 非表示

  • 黄色灯照射が飼料用トウモロコシの生育程度および収量に及ぼす影響

    石垣元気・酒井貴志・安達鉄矢

    日本草地学会  2022年3月 

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    開催年月日: 2022年3月

    記述言語:日本語   会議種別:口頭発表(一般)  

  • LEDライトトラップを用いた飼料用ダイズの主要害虫管理技術に関する基礎的研究

    石垣元気・高橋京史・Yogi Sidik Prasojo・明石 良

    日本草地学会  2021年3月 

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    開催年月日: 2021年3月

    記述言語:日本語   会議種別:口頭発表(一般)  

  • 飼料用ダイズの多回刈り技術に関する基礎的研究

    石垣元気・Yogi Sidik Prasojo・橋口正嗣・明石 良

    日本草地学会  2020年3月 

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    開催年月日: 2020年3月

    記述言語:日本語   会議種別:口頭発表(一般)  

  • シリカ材添加条件下における家畜排泄物の臭気低減に関する研究

    石垣元気・小林郁雄

    日本草地学会  2019年3月 

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    開催年月日: 2019年3月

    記述言語:日本語   会議種別:口頭発表(一般)  

  • Genetic, breeding and physiology of tropical forage 招待あり 国際会議

    Genki Ishigaki

    日中韓草地学会議  2018年7月 

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    開催年月日: 2018年7月

    記述言語:英語   会議種別:口頭発表(一般)  

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受賞 【 表示 / 非表示

  • 日本草地学会研究奨励賞

    2015年3月   日本草地学会  

    石垣元気

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

科研費(文科省・学振・厚労省)獲得実績 【 表示 / 非表示

  • 西南暖地における飼料用ダイズの多回刈り技術の基礎的研究ー刈り取り高さと踏圧回数ー

    研究課題/領域番号:19K06000  2019年04月 - 2024年03月

    独立行政法人日本学術振興会  科学研究費補助金  基盤研究(C)

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    担当区分:研究代表者 

その他競争的資金獲得実績 【 表示 / 非表示

  • 令和3年度飼料害虫ツマジロクサヨトウの防除対策事業

    2021年04月 - 2023年03月

    日本中央競馬会  令和3年度日本中央競馬会畜産振興事業 

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    担当区分:研究代表者 

受託研究受入実績 【 表示 / 非表示

  • 省力・省コスト・省資源で循環する次世代型畜産-都城における実証に向けての試験研究-

    2024年08月 - 2025年03月

    都城市  一般受託研究 

    石垣 元気、新美 光弘,北原 豪、上村 涼子、大澤 健司

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    担当区分:研究代表者  受託研究区分:一般受託研究

  • 省力・省コスト・省資源で循環する次世代型畜産-都城における実証に向けての試験研究-

    2022年08月 - 2024年03月

    都城市  一般受託研究 

    上村 涼子、大澤 健司、石垣 元気、新美 光弘

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    担当区分:研究分担者  受託研究区分:一般受託研究

研究・技術シーズ 【 表示 / 非表示