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Affiliation |
Faculty of Agriculture Department of Animal and Grassland Sciences |
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Title |
Professor |
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External Link |
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ISHII Yasuyuki
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Degree 【 display / non-display 】
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Doctor (Agriculture) ( 1993.3 The University of Tokyo )
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Master (Agriculture) ( 1985.3 The University of Tokyo )
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Bachelor (Agriculture) ( 1983.3 The University of Tokyo )
Research Areas 【 display / non-display 】
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Life Science / Animal production science / Animal Husbandry, Grassland Science
Papers 【 display / non-display 】
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Effects of Italian ryegrass silage supplementation on feed intake and behavior of pregnant sows Reviewed
Makalani A.L., Kawashima T., Ishii Y., Takahashi T.
Animal Science Journal 94 ( e13887 ) 1 - 7 2023.10
Language：English Publishing type：Research paper (scientific journal) Publisher：Animal Science Journal
This study aimed to assess the behavior and stress status of pregnant sows following supplementation with Italian ryegrass silage (IRS) and the impact of feeding the IRS on feeding costs. Six sows with an initial body weight (BW) of 238.6 ± 5.9 kg were allotted to a 6 × 3 Latin square design with a 5-day acclimatization period followed by a 5-day data collection period. A commercial diet was replaced by IRS on a dry matter (DM) basis up to 0%, 9%, and 13% in the control treatment and the two test treatments, respectively. Apart from collecting data on daily feed intake and BW, urine was collected, and video footage was recorded for the last day of each treatment for analysis of urinary cortisol and behavior. There were no leftovers with all diets and nutrient uptake was unaffected (p > 0.05), while BW gain decreased (p < 0.05) to be a limited range from 1% to 3%, with increased inclusion of IRS. Both the behavior of sows and cortisol concentration were unaffected (p > 0.05). Furthermore, it was estimated that feeding 13% DM of IRS would reduce feed costs by 17%. IRS would be acceptable in replacing up to 13% of the commercial diet and cutting feeding costs.
DOI： 10.1111/asj.13887
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Germination Growth of Mutant (M1) Leucaena leucocephala cv. Tarramba Induced by Gamma Ray Irradiation Reviewed International coauthorship
Khaerani P.I., Musa Y., Utamy R.F., Indriatama W.M., Kantong S.A., Ishii Y.
AIP Conference Proceedings 2628 2023.6
Authorship：Last author Publishing type：Research paper (scientific journal) Publisher：AIP Conference Proceedings
Currently, experiments have been performed in modifying grass and legume to uncover their genetic variability. Such irradiation method could discover the hidden genetic potential of Leucaena leucocephala cv. Tarramba considering its nutritional content, high protein content, and good palatability. This study is a preliminary study of Leucaena leucocephala cv. Tarramba mutant (Ml). This study aims to identify the germination growth of Ml induced by gamma irradiation. The irradiation was performed in the National Nuclear Energy Agency of Indonesia. The germination experiments were conducted for one month in Green House, Central of Excellence (COE), Agriculture Faculty, Hasanuddin University. This study employed a completely randomized design (CRD) with nine treatments and eight replicates. The treatment included gamma irradiation at different doses that consisted of control treatment (without gamma induction); 50Gy; 150Gy; 250Gy; 350Gy; 450Gy; 550Gy; 650Gy; and 750Gy. The observed parameters in this study encompassed plumule length, radicule length, seedling length. Data obtained from observation were analyzed using analysis of variance (ANOVA) based on Duncan's Multiple Range Test (DMRT) at 5% margin error. The results indicated that gamma irradiation significantly affected the germination growth performance, i.e., plumule length, radicule length, and seedling, where the coefficient of variance <20%. Although fluctuation of germination performance value occurred, the plumule length performance tended to increase at the control and re-increase at the dose of 650Gy to 750Gy. Whereas the radicule and seedling length performance relatively increase at the dose of 550Gy to 750Gy. Based on the results, it can be concluded that the dose of 650Gy to 750Gy increases germination growth of Mutant (Ml) Leucaena leucocephala cv. Tarramba. Further research concerning the lethal dose for the forages, DNA genetic analysis and ensuring no toxic effect on livestock would be important to perform.
DOI： 10.1063/5.0144831
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Investigation on Spraying Percentage of Droplets at Leaves and Ears using Several Pesticide Spraying Methods in Several Growth Stages of Maize (<i>Zea mays</i> L.) Reviewed
Ishigaki Genki, Idota Sachiko, Ishii Yasuyuki
Japanese Journal of Grassland Science 67 ( 4 ) 183 - 188 2022.4
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
To clarify a basic knowledge on pesticide application methods against fall armyworm (<i>Spodoptera frugiperda</i>), we investigated the spraying percentage of droplets on leaves and ears covered by water-sensitive paper using several pesticide-spraying methods, including tractor-mounted boom sprayers, handheld electrostatic sprayer, and drone-spraying at various growth stages of maize (<i>Zea mays</i>). In boom spraying methods, the spraying percentages of droplets under the sprayed rate of 200 L per 10 a at the 1st-2nd leaf stage was over than 98％. In the case of 100 L per 10 a at the 5-6th leaf stage, they were less than 50％. For the tractor-mounted boom sprayer, spraying percentages of droplets at the top- and middle-leaves in the 9-10th leaves stage were lower than those at the lower-leaves. On the other hand, the electrostatic sprayer exhibited the opposite results. In drone-spraying at the dough-ripe maize, they were obtained more than 60％ in base and middle part of upper- and middle-leaves under the amount of 100 L per 10 a. These results elucidate important information that contributes to our basic knowledge on the selection of pesticide application methods against fall armyworm. It will be necessary to clarify the relationship between the spraying percentage of droplets and the control/exterminating effect.
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Mixed Cropping of Dwarf Napiergrass (Pennisetum purpureum cv. Mott) with Indigofera (Indigofera zollingeriana) using an Alley Cropping System Reviewed International coauthorship
Renny Fatmyah Utamy, Herry Sonjaya, Yasuyuki Ishii*, Syamsuddin Hasan, Maulina Nazira, Mujtahida Taufik, Etrid Januarti
The Open Agriculture Journal 15 ( 1 ) 111 - 118 2021.12
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Open Agriculture Journal
Background:
Mixed cropping of forage grasses and legumes can potentially improve the performance of herbivores. However, the feasibility of grasses mixed-cropped with legumes should be examined at different plant densities.
Aim:
This study aimed to evaluate the growth characters and forage chemical composition in dwarf napiergrass (Pennisetum purpureum cv. Mott) with Indigofera (Indigofera zollingeriana) grown using alley cropping.
Methods:
Three densities of dwarf napiergrass with Indigofera, i.e., high density (2 and 1 plants m-2, respectively); medium density (1.33 and 1 plants m-2, respectively); and low density (1 and 1 plants m-2, respectively) were applied under rainfed conditions in Makassar.
Results:
Plant density significantly affected growth characteristics, such as plant height and tiller density in dwarf napiergrass (p<0.05), and non-significantly affected plant height and branch density (p>0.05) in Indigofera. Plant density did not affect the yielding ability at the first defoliation and annual total of yields (p>0.05), except at the second defoliation when the dry matter production of dwarf napiergrass peaked in the low plant density treatment (p<0.05). In terms of chemical composition, plant density significantly affected fiber concentrations of acid detergent fiber and neutral detergent fiber, which were lowest at low plant densities (p<0.05). The acid detergent lignin and cellulose concentrations tended to be lower at low plant densities, but the differences were not significant (p>0.05).
Conclusion:
We consider that alley cropping systems for dwarf napiergrass and Indigofera are suitable if low plant densities are employed in the region. -
Effect of Cocoa Pulp Level Mixed With Feed Concentrate on Performance and Blood Metabolite Profiles of Dry-Lot Fattening Bali Steers Reviewed International coauthorship International journal
Renny Fatmyah Utamy, Yasuyuki Ishii, Ambo Ako, Muhammad Ihsan Andi Dagong, N. Nahariah, Purnama Isti Khaerani, Arung Bandong, Faisal Asbar and Ardianto
Online Journal of Biological Sciences 21 ( 4 ) 329 - 337 2021.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Science Publications
Aim of this study is to evaluate the utilization of cocoa pulp as an
alternative feedstuff source for the performance and blood metabolite
profiles of dry-lot fattening Bali steers. Nine fattening Bali steers were
randomly assigned to experimental diets, composed of three levels of cocoa
pulp of 0, 5 and 10% with reducing levels of milled corn composition at 20,
14 and 8%, designated as ED0 (control), ED1 and ED2, respectively, under
a completely randomized design. Herbages, consisted of dwarf napiergrass
(Pennisetum purpureum cv. Mott) at 90% and Indigofera sp. at 10%, were
fed at fresh matter basis 60%, with the experimental diet at 40%. Dry Matter
Intake (DMI) tended to be higher in ED1 than in ED2 without significant
difference (p>0.05) among treatments. The Average Daily Gain (ADG)
decreased from 0.74 kg/head/day in ED0 to 0.43 kg/head/day in ED2, while
that in ED1 did not decrease from ED0. The effect of experimental diets did
not differ significantly (p>0.05) on body performance, hematological or
biochemical parameters. The results indicated that the experimental diet did
not affect the hematological or biochemical parameters; however, the
feedstuff mixed with cocoa pulp at 5% showed a comparable average daily
gain in fattening Bali steers with control.
Books 【 display / non-display 】
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日本中央競馬会畜産振興事業・ツマジロクサヨトウ防除対策マニュアル ５．ツマジロクサヨトウの被害解析（剪葉処理）
石井 康之（ Role： Sole author , 試験計画、調査方法の検討、調査、化学分析、原稿の執筆）
宮崎大学 2024.3
Language：Japanese Book type：Report
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Frost-matured silage-processing of tropical grasses in southern Kyushu ーYield, silage quality and preference of late-summer sown pearl millet foggageー
Yasuyuki Ishii, Genki Ishigaki and Sachiko Idota（ Role： Joint author , Conceptualization, methodology, investigation, formal analysis, and writing the original draftthe manuscript）
Ito Memorial Fundation 2023.10
Language：Japanese Book type：Report
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科学研究費助成事業・研究成果報告書・１９Ｋ０６３７１「 研究代表者 研究課題名（英文） 交付決定額（研究期間全体）：（直接経費） １７６０１ 基盤研究(C)（一般） 2019～2021 矮性ネピアグラス草地の秋季休牧・霜枯れ草地利用による周年放牧の有効性」
石井 康之（ Role： Sole author , 研究計画の立案、実施、取りまとめおよび執筆）
科研費KAKENHI 2022.6
Language：Japanese Book type：Report
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畜産学（共著）
入江正和（編著）石井 康之他13名共著（ Role： Joint author , 第4章 家畜の栄養と飼料 4．6 飼料作物と牧草）
養賢堂 2022.3 （ ISBN:978-4-8425-0583-1 ）
Total pages：430 Responsible for pages：148－168 Language：Japanese Book type：Scholarly book
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大門弘幸・奥村健治編 作物栽培体系8 飼料・緑肥作物の栽培と利用（共著）
石井 康之（ Role： Sole author , 4.2 暖地型イネ科牧草）
朝倉書店 2017.4
Total pages：232 Responsible for pages：80-104 Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
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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 Invited
石井 康之・井戸田 幸子・石垣 元気
牧草と園芸 69 ( 3 ) 10 - 14 2021.5
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：雪印種苗株式会社
本学では九州沖縄農研センターと連携し、令和元
年度から安心・安定的な飼料生産の実現に向け、海
外情報や国内の被害実態などの緊急調査の結果や飼
料生産における本害虫の効果的防除法など、必要な
知見を収集・整理した飼料生産マニュアル（第 1 版）
を、令和 2 年 2 月に刊行するとともに、令和 2 年度
も調査を継続しています。本稿ではその中で、ツマ
ジロクサヨトウの防除、散布試験、散布試験におけ
る飛散（ドリフト）、食害を模擬した剪葉処理に伴
う収量の変動について報告しています。 -
Availability of autumn-saved foggage pasture in dwarf Napiergrass to winter grazing by Japanese-Black breeding beef cows Invited
Yasuyuki Ishii
4 ( 1 ) 56 - 58 2020.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)
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Grazing use of dwarf napiergrass pasture by breeding beef cows
Yasuyuki Ishii
Report of Kyushu Branch, Japanese Society of Grassland Science 34 ( 1 ) 21 - 29 2004.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：Kyushu Branch of Japanese Society of Grassland Science
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九州の草地・飼料作研究における各分野の最近10年間の歩み－生理・生態－
石井 康之
日本草地学会九州支部会報 31 ( 2 ) 89 - 92 2002.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：日本草地学会九州支部会
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Research for the development of the sustainable forage production system by small-holding dairy farmers in Thailand
Yasuyuki Ishii
Report of Kyushu Branch, Japanese Society of Grassland Science 27 ( 1 ) 38 - 41 1997.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：Kyushu Branch of Japanese Society of Grassland Science
Presentations 【 display / non-display 】
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Growth, yield, and foggage quality of late-summer sown pearl millet.
Yasuyuki Ishii＊, Hiraru Shigetomi, Genki Ishigaki, Mitsuhiro Niimi, Sachiko Idota
2023.3.26
Event date： 2023.3.26 - 2023.3.28
Language：Japanese Presentation type：Oral presentation (general)
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Establishment and yield of amaranth and cereal small-grain forages in a range of cropping system in southern Kyushu
Zhong Zixuan・Yasuyuki Ishii*・Manabu Tobisa・Mitsuhiro Niimi・Sachiko Idota
2023.3.26
Event date： 2023.3.26 - 2023.3.28
Language：English Presentation type：Oral presentation (general)
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Dry matter yield and grain yield components as affected by thinning treatments at several growth stages in forage maize.
Midori Ishitani, Yasuyuki Ishii＊, Manabu Tobisa, Mitsuhiro Niimi, Sachiko Idota
2023.3.28
Event date： 2023.3.26 - 2023.3.28
Language：Japanese Presentation type：Oral presentation (general)
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Year-round grazing suitability of dwarf napiergrass pasture by Japanese-Black breeding beef cows
Yuna Watanabe, Yasuyuki Ishii*, Genki Ishigaki, Ikuo Kobayashi, Mitsuhiro Niimi, Sachiko Idota
2023.3.26
Event date： 2023.3.26 - 2023.3.28
Language：Japanese Presentation type：Oral presentation (general)
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Grass-based Animal Production in Southern Kyushu Invited International conference
Yasuyuki Ishii
VIRTUAL INTERNATIONAL SEMINAR “ Multidisciplinary Approach For Sustainable Animal Production”, Faculty of Animal Husbandry, Padjadjaran University (Virtual International Seminar) 2021.11.18 FAKULTAS PETERNAKAN, UNIVERSITAS PADJADJARAN
Event date： 2021.11.18
Language：English Presentation type：Oral presentation (invited, special)
Venue：Virtual International Seminar Country：Indonesia
インドネシア、Padjadjaran大学・畜産学部のインターネット国際セミナーにおいて、招待講演として「南九州における草地畜産業の取り組み」を紹介した。
Awards 【 display / non-display 】
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日本草地学会賞
2006.3 日本草地学会
石井康之
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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矮性ネピアグラス草地の秋季休牧・霜枯れ草地利用による周年放牧の有効性
Grant number：19K06371 2019.04 - 2022.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator Grant type：Competitive
南九州では，自給粗飼料の確保がネックとなり，近年小規模経営体が減少し，飼養頭数の減少を招いている。暖地型牧草矮性ネピアグラスは， 本地域では多年生で放牧利用に適するが，暖地型牧草は，降霜で地上部が枯死するため，従来放牧利用期間は降霜前に限定されていた。一方我々は，矮性ネピアグラスに放牧馴致した繁殖牛群では，秋季に休牧・貯草後霜枯れした草地に放牧しても，被食性や増体性に夏季生育期間と大差がないことを見出した。本研究では，夏季と冬季に繁殖牛群を矮性ネピアグラス草地に輪換放牧し，被食性や増体性，霜枯れ草の炭水化物含量等を検討することにより，本地域の省力的な繁殖牛周年放牧管理法として提案したい。そこで，南九州の小規模繁殖牛農家が，暖地型牧草矮性ネピアグラス草地を夏季に輪換放牧した後秋季に休牧・貯草（Autumn-Saved Pasture, 以下ASP）管理を行うことにより，降霜後の冬季にも夏季と同様な輪換放牧飼養が可能であるか，その場合の草量，増体性などに悪影響がないか，経年 変化を含めて検証したい。次いで，降霜後の気象条件次第では，矮性ネピアグラスに対する放牧家畜の選好性が向上する傾向が伺われた。この際，採食行動に差異をもたらす要因として，霜枯れによる葉身および茎中の構造性・非構造性炭水化物含量の変化の実態を明らかにしたい。これらを通じ，本地域の小規模繁殖牛農家における省力的な放牧管理方法としての有効性を明らかにしたい。
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ネピアグラス栽培による口蹄疫家畜埋却地および耕作放棄地の飼料・資源植物生産
2016.04 - 2019.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
南九州地域に存在する条件不利地の中で，特に宮崎県児湯郡管内に約100 ha存在する口蹄疫家畜埋却地，および全国に約40万haある耕作放棄地を，飼料生産あるいはバイオ燃料原料などの資源植物生産に活用することが望まれている。低コストで持続的な生産を行うためには，家畜堆肥を活用しながら，これらの土地における矮性ネピアグラス（DL）を中心としたネピアグラス栽培の適応性を検討する必要がある。そこで，宮崎県児湯郡内の1）口蹄疫家畜埋却地における飼料作物としてのDL栽培の適応性，2）耕作放棄地における資源作物としてのネピアグラス栽培の適応性を，既往の研究成果を継続発展させる形で実施し，飼料・食料自給率の向上と小規模肉用繁殖牛農家の維持・育成に寄与できることを目指す。
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放射性セシウム汚染農用地再生に向けたネピアグラスによるセシウム吸収除去法の確立
2013.04 - 2016.03
科学研究費補助金 基盤研究(C)
Authorship：Coinvestigator(s)
放射性セシウムに汚染された農用地の再生に向けたネピアグラスによるセシウム吸収除去法の確立を探求するため，宮崎大学で養成したネピアグラスの栄養繁殖苗を，代表者の研究機関である弘前大学に送付し，汚染地の福島県での栽培に供することを目的とする。
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ネピアグラス栽培による重金属汚染，口蹄疫家畜埋却，耕作放棄土壌の修復，飼料生産
2013.04 - 2016.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
家畜生産における粗飼料自給率，さらには食料自給率の向上を目指し，同時に重金属汚染，口蹄疫家畜埋却，耕作放棄などの条件不利圃場での低コストで持続的な粗飼料生産を行うために，矮性ネピアグラス（DL）を中心としたネピアグラス栽培の適応性を，1）宮崎県を中心とした九州・沖縄地域，特に耕作放棄地の放牧管理へのDLの普及，2）重金属（特にカドミウム）汚染土壌の修復に果たすDLを中心としたネピアグラスの機能の解明，3）宮崎県児湯郡内の口蹄疫家畜埋却地における植生管理としてのDL栽培の適応性を，既往の研究成果を継続発展させる形で実施する。その結果，DLの牧草としての優れた特性が種々の条件不利地に応用され，飼料・食料自給率の向上と小規模肉用繁殖牛農家の維持・育成に寄与できることを目指す。
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Further extension of environment-conservative breeding cow feeding by dwarf napiergrass into Kyushu region
2009.04 - 2012.03
Grant-in-Aid for Scientific Research Grant-in-Aid for Scientific Research(C)
Authorship：Principal investigator
Other external funds procured 【 display / non-display 】
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Adaptability of Napiergrass (Pennisetum purpureum Schumach) for Weed Control in Site of Animal Buried after Foot-and-Mouth Disease Infection
2012.04 - 2013.03
Private Foundations
Authorship：Principal investigator Grant type：Competitive
Other research activities 【 display / non-display 】
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成果有体物提供契約書 名称：ネピアグラス300kg
2023.08 - 2023.10
2023年度JOGMEC共同スタディにおけるアルカリ除去検討および燃料用原料としての適性評価のため、ネピアグラスを300kg（収穫時の数量をもとに、両者で別途合意）提供する。
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成果有体物提供契約書 名称：ネピアグラス500kg
2022.09 - 2023.02
2022年度JOGMEC共同スタディにおけるアルカリ除去検討および燃料用原料としての適性評価のため、ネピアグラスを500kg（収穫時の数量をもとに、両者で別途合意）提供する。
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成果有体物提供契約書 名称：ソルガム500kg
2022.09 - 2023.02
2022年度JOGMEC共同スタディにおけるアルカリ除去検討および燃料用原料としての適性評価のため、ソルガムを500kg（収穫時の数量をもとに、両者で別途合意）提供する。
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成果有体物提供契約書 名称：ソルガム1000kg
2022.09 - 2023.02
2022年度JOGMEC共同スタディにおける燃料用原料としての炭化適性評価のため、ソルガムを1000kg（収穫時の数量をもとに、両者で別途合意）提供する。
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ネピアグラス提供に関する覚書
2022.06
宮崎大学（以下、「甲」という。）と有限会社鬼目養鶏場（以下、「乙」という。）は、甲の保有する矮性ネピアグラスの苗200本を乙に提供し、乙は、自給飼料で牛を育成することを目指し、放牧草地に移植するための苗を養成する目的で飼料畑の苗圃に移植する。