石垣 元気 (イシガキ ゲンキ)

ISHIGAKI Genki

写真a

所属

農学部 附属フィールド科学教育研究センター

職名

准教授

外部リンク

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 / 遺伝育種科学

 

論文 【 表示 / 非表示

  • 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

  • The effects of the different sowing methods and planting density on the yield components of soybean (Glycine max) under intercropping condition with rhodes grass (Chloris gayana Kunth.) 査読あり 国際共著

    Prasojo Y.S., Niimi M., Hashiguchi M., Muguerza M., Ishigaki G.

    Australian Journal of Crop Science   17 ( 10 )   770 - 775   2023年10月

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    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)   出版者・発行元:Australian Journal of Crop Science  

    In Japan, grass-legume intercropping systems are being developed to increase quality and yield of grain and forage. Hence, this study evaluated the effects of sowing methods and planting density on yield traits of forage soybean under intercropping condition with rhodes grass. The field experiment was laid on in a completely randomized block design with four treatments and four replications. Rhodes grass seeds were sown at 2.8 kg/10a in a field containing mono- and intercropping-plots. For soybeans, two levels of sowing densities (about 15 or 30 seeds/m2: named “L” and “H”) and two sowing methods (row or spray: named “R” and “S”) were applied for a total of four different intercropping combinations. Rhodes grass DMY obtained the highest in low level of sowing density with rowing methods (LR) (338 kg/10a) while soybean DMY obtained the highest in high level of sowing density with rowing methods (HR) (251 kg/10a) and in high level of sowing density with spray methods (HS) (177 kg/10a). Intercropping at low density increased CP (12%) and CPY (40.4 kg DM/10a) in Rhodes grass, and CP (18.9%) in soybeans, whereas high sowing density increased soybean CPY in HR (41.5 kg DM/10a) and contributed to higher soybean CPY in DM percentage at 66% (HS) and 56% (HR). Overall, high density sowing increased the 1st total DMY while row sowing increased the 1st total CPY in both crops at the first cutting, while monocropping increased Rhodes grass yield and plant length at the second-cutting. Also, sowing soybean by a broadcast spreader could obtain sufficient crude protein yield as a forage soybean in southern Kyushu, Japan. Further studies are needed for soybean overseeding method and use of early-maturity soybean lines.

    DOI: 10.21475/ajcs.23.17.10.p3880

    Scopus

  • 分光反射率から算出した植生指数によるローズグラスの粗タンパク質含量推定の検討 査読あり

    荒井 昌和, 中村 渓士郎, 石垣 元気

    日本草地学会誌   69 ( 1 )   23 - 26   2023年4月

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    担当区分:最終著者   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  

    Crude protein in grasses is an essential nutrient that affects the growth of dairy cattle and the quality of milk produced by the cattle. Moreover, there has been demand for non-destructive measurement technology for measuring grass crude protein content. In this study, we investigated the relationship between the crude protein content and vegetation index of Rhodes grass (<i>Chloris gayana</i> Kunth.). A fertilization experiment was conducted using chemical fertilizers at six levels of nitrogen input in 2018. We used an indoor spectrophotometer to measure the reflection spectrum of Rhodes grass fresh leaves and calculated the two types of vegetation indices, normalized difference vegetation index (NDVI) and green normalized difference vegetation index (GNDVI). The nitrogen content was measured using the Dumas method, with the instrument of a total nitrogen analyzer and total carbon analyzer. We clarified the relationships among the fertilization date, nitrogen input level, and harvesting date. The crude protein content varied from 5.8% to 22.1%. The coefficients of determination of GNDVI and NDVI were 0.88 and 0.73, respectively, and the root mean squared errors of GNDVI and NDVI were 1.7 and 2.6, respectively. Therefore, we demonstrated the potential of estimating crude protein content in Rhodes grass by spectral reflectance.

    DOI: 10.14941/grass.69.23

    CiNii Research

  • Effect of water priming on the seed moisture content and the rooting of soybean *Glycine max (L.) Merr.+ ‘Fukuyutaka’ seeds under non-irrigated conditions 査読あり

    Honda N., Ishigaki G.

    Australian Journal of Crop Science   17 ( 2 )   240 - 243   2023年2月

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    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)   出版者・発行元:Australian Journal of Crop Science  

    This study aimed to clarify the effect of water priming on the seed moisture and the rooting rate of soybean *Glycine max (L.) Merr.+ ‘Fukuyutaka’ for developing a cultivation method, where soybean seeds can directly be sown on the meadow or grassland for livestock production. The weight of each soybean seed was measured before and after they were subjected to: no treatment (control), and, two kinds of priming treatments, soaking (2 and 4 h), and moisture absorption (3, 12, and 24 h). The weight of seeds was additionally measured after keeping them at a specified temperature (28–30°C) and humidity (58–60%) for 4 h, 1, 2, and 3 days. The moisture content of soybean seeds was calculated based on their weights pre and post-treatment. The rooting rate of the seeds was investigated after each priming (control, soaking, and moisture absorption), 48 h of standing and irrigation treatment. The seed moisture content of soybean seeds increased immediately after priming (soaking or moisture absorption treatment), however, after standing, the moisture content in both treatments deceased to the same level as that of control. The rooting rate in both priming pre-treatments was similar to or lower than that in control, indicating that neither soaking nor moisture absorption of soybean seeds had a keeping moisture content of seeds for long time which promoting effect on rooting of soybean under dry condition on meadow or grassland.

    DOI: 10.21475/ajcs.23.17.02.p3814

    Scopus

  • Tissue Culture and Somatic Embryogenesis in Warm-Season Grasses—Current Status and Its Applications: A Review 査読あり 国際共著

    Muguerza M.B., Gondo T., Ishigaki G., Shimamoto Y., Umami N., Nitthaisong P., Rahman M.M., Akashi R.

    Plants   11 ( 9 )   2022年5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:Plants  

    Warm-season grasses are C4 plants and have a high capacity for biomass productivity. These grasses are utilized in many agricultural production systems with their greatest value as feeds for livestock, bioethanol, and turf. However, many important warm-season perennial grasses mul-tiply either by vegetative propagation or form their seeds by an asexual mode of reproduction called apomixis. Therefore, the improvement of these grasses by conventional breeding is difficult and is dependent on the availability of natural genetic variation and its manipulation through breeding and selection. Recent studies have indicated that plant tissue culture system through somatic em-bryogenesis complements and could further develop conventional breeding programs by micro-propagation, somaclonal variation, somatic hybridization, genetic transformation, and genome ed-iting. This review summarizes the tissue culture and somatic embryogenesis in warm-season grasses and focus on current status and above applications including the author’s progress.

    DOI: 10.3390/plants11091263

    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

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  • 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-

    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