Papers - IDOTA Sachiko
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Relationship between soil chemical and physical properties and vegetation in the latest decade of alpine grasslands of southern Qinghai, China. Reviewed
Sachiko Idota，Jiahua Yang, Manabu Tobisa, Xiaoqin Li, Guomei Li, Rende Song, Haizhu Li, Nobumi Hasegawa, Masahiro Tasumi, Naoyuki Yamamoto, Aya Nishiwaki and Yasuyuki Ishii
Proceedings of the 22nd International Grassland Congress 1421 - 1422 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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An ecological monitoring of the plateau pika and its impact on grassland – An experiment in the Yushu District, Qinghai Province of China. Reviewed
Masahiro Tasumi, Nobumi Hasegawa, Akira Fukuda, Rende Song, Guomei Li, Jiahua Yang, Manabu Tobisa and Sachiko Idota
Proceedings of the 22nd International Grassland Congress 1629 - 1630 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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Management options that increase herbage production in grassland-based livestock production systems. Invited Reviewed
Masahiko Hirata, Manabu Tobisa and Sachiko Idota
Proceedings of the 22nd International Grassland Congress 462 - 468 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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C4-Napier Grass Cultivation for Cadmium Phytoremediation Activity and Organic Livestock Farming in Kyushu, Japan Reviewed
Yasuyuki Ishii, Kotomi Hamano, Dong Jin Kang, Rengsinkul Kannika, Sachiko Idota, Kiichi Fukuyama, Aya Nishiwaki
Journal of Agricultural Science and Technology A ( 3 ) 321 - 330 2013.6
Language：English Publishing type：Research paper (scientific journal)
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Variation in Growth Attributes, Dry Matter Yield and Quality Among 6 Genotypes of Napier Grass used for Biomass in Year of Establishment in Southern Kyusyu, Japan Reviewed
Lizah Khairani, Yasuyuki Ishii, Sachiko Idota, Renny Fatmyah Utamy, Aya Nishiwaki
Asian Journal of Agricultural Research 7 ( 1 ) 15 - 25 2013.6
Language：English Publishing type：Research paper (scientific journal)
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Khairani L., Khairani L., Ishii Y., Idota S., Utamy R., Nishiwaki A.
Asian Journal of Agricultural Research 7 ( 1 ) 15 - 25 2013.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Asian Journal of Agricultural Research
As for estimating the suitability of napier grass for biomass use in southern Kyushu, Japan, the objective of this study was to determine the most suitable genotype of napier grass for dry matter production and quality (fiber content) for biomass ethanol conversion in the year the plants were established. Six genotypes of napier grass, a dwarf early-heading type, a dwarf late-heading type, a hybrid of pearl millet with napier grass, a purple-foliage type and normal varieties of Merkeron and Wruk wona, were examined for growth attributes, dry matter yield, chemical composition and in vitro Dry Matter Digestibility (IVDMD) at the University of Miyazaki in southern Kyushu, Japan in 2009. Dry matter yield ranged from 13.4 to 33.5 Mg ha-1, with the highest yielder being normal Wruk wona, followed by Merkeron. Hemicellulose and cellulose content of both Leaf Blade (LB) and stem inclusive of leaf sheath (ST) did not differ significantly among genotypes, except for cellulose content in ST which was significantly higher for the dwarf early-heading type than for the other genotypes. The dwarf late-heading type had significantly higher IVDMD in ST (65.8%) due to lower acid detergent lignin and cellulose content in ST than the other genotypes. Based on dry matter production, fiber (carbohydrate) content in the current study and theoretical conversion efficiency from cellulose and hemicelluloses of 0.29 and 0.23, respectively, Merkeron appears the most promising genotype for biomass production, with theoretical ethanol production potential of 5850 L ha-1 year-1 in the year of establishment. © Knowledgia Review, Malaysia.
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IDOTA S., ASANO Y., KIRIMURA M., SUGIMOTO Y., ISHII Y.
Journal of Japanese Society of Grassland Science 58 ( 4 ) 230 - 240 2013.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
A 2-year field experiment was conducted to examine the fertilizing effect of digested effluent of manure (DEM) on growth attributes, dry matter yield, forage quality and nitrogen (N) recovery rate of maize (Zea mays L.)-Italian ryegrass (Lolium multiflorum Lam.) cropping system, compared with application of conventional fertilizer (commercial cattle manure and chemical fertilizer) and sole chemical fertilizer. The DEM solution was applied at three levels : 40, 70 and 100 gN/m^2/year for low, medium and high levels, respectively. The N application level in the chemical and conventional fertilizer treatment were 40 and 69.2 g N/m^2/year, respectively, which were similar to and the same as in the low and medium levels of DEM, respectively. The effect of DEM on growth attributes, yield, forage quality and nitrogen recovery rate of each cropping and total of this cropping system was almost corresponded with that of the chemical fertilizer at the same N application rate. This suggests that DEM can be used in short-term as substitution of fastly effective chemical fertilizer and optimum application rate of DEM should be below 40 gN/m^2/year in the maize-Italian ryegrass cropping system in southern Kyushu.
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IDOTA Sachiko, TOBISA Manabu, UEMURA Ryoko, HORII Yoichiro, SUEYOSHI Masuo, ISHII Yasuyuki, NISHIWAKI Aya, YAMAMOTO Naoyuki
Journal of Japanese Society of Grassland Science 58 ( 4 ) 277 - 279 2013.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
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Forage Use as Remediation on Burial Sites of Foot-and-Mouth Disease Infection
NISHIWAKI Aya, ISHII Yasuyuki, IDOTA Sachiko, YOKOTA Masato
Journal of Japanese Society of Grassland Science 58 ( 4 ) 266 - 268 2013.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
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メタン発酵消化液の施用が南九州におけるトウモロコシ－イタリアンライグラス体系の収量性と飼料品質に及ぼす影響． Reviewed
井戸田幸子, 浅野陽樹,霧村雅昭,杉本安寛,石井康之
日本草地学会誌 58 ( 4 ) 230 - 240 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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KAJIYA Yusuke, IDOTA Sachiko, ISHII Yasuyuki, FUKUYAMA Kiichi
Nihon Souchi Gakkai Kyushu Shibukaiho 56 ( 2 ) 143 - 150 2013
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Warm Regional Society of Animal Science, Japan
Since Kyushu is the base of beef cattle industry in Japan, livestock wastes needs to be treated effectively as an organic fertilizer replacing inorganic or chemical fertilizers in forage production. However, little is known about the differences in mineralization characteristics and fertilizing efficiency between farmyard manures derived from cattle with different feeding systems. Thus, effects of farmyard manures derived from fattening beef cattle with co-digestion substrates of sawdust (abbreviated as F+SM) and breeding beef cattle under the feeding of sawdust (B+SM) or grazing on bahiagrass with the substrate of sawdust (B+BSM) or rhodesgrass (B+BRM) were examined for herbage yield, nitrogen content and soil chemical properties in tropical colored guineagrass. Even though the F+SM had lowest total nitrogen (TN) content with highest carbon/nitrogen (C/N) ratio, herbage dry matter yield (DMY), crude protein (CP) content and chlorophyll content in colored guineagrass were highest in the F+SM, on the contrary to the B+BRM which had highest TN content with lowest C/N ratio, leading to the lowest herbage DMY and CP content. Nitrogen mineralization characteristics of farmyard manure determined by an incubation method showed the highest efficiency from F+SM, followed by B+BSM, B+SM and lowest from B+BRM, which lead to an resolution for the contradiction between chemical properties of farmyard manure and the grass growth. Soil chemical properties such as pH and TN content did not vary so much and were hardly correlated with these herbage yield and TN content. It is proposed that the characteristics and fertilizing efficiency of beef cattle farmyard manures should be variable depending on beef cattle feeding systems and co-digestion substrates, and the F+SM had highest fertilizing efficiency on the grass growth among farmyard manures examined.
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MORI Koutarou, ISHII Yasuyuki, YAMANO Asuka, HAMANO Kotomi, NAKAHARA Tomoaki, IDOTA Sachiko
Journal of Japanese Society of Grassland Science 58 ( 2 ) 83 - 89 2012.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
In order to improve growth and seasonal productivity of bahiagrass (Paspalum notatum Flugge) during the low temperature season in southern Kyushu, growth attributes, forage yield and quality of a new genotype, "Tifton 9", which was bred in and introduced from the United States, was compared to current genotypes, "Pensacola" and "Nanou", for 4 years after the year of establishment. Observation and cutting of herbage were conducted every month in the second and third years and every 2months in the fourth and fifth years. "Tifton 9" showed superior growth and yielding ability during the low temperature season, resulting in stabilization of seasonal productivity and improvement of annual dry matter (DM) yield cut every month in the second and third years. In vitro DM digestibility (IVDMD) as forage quality did not differ among three genotypes and correlated negatively (P<0.05) with DM yield for both 1- and 2-month intervals. Other quality attributes did not differ among genotypes. The average values for IVDMD and concentrations of crude protein, neutral detergent fiber, acid detergent fiber and acid detergent lignin in "Tifton 9" across whole cuttings in the fifth year were 49.4, 6.5, 70.5, 42.1 and 6.7%, respectively. Respective forage quality of "Tifton 9" is equivalent to a standard value among common tropical grasses.
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バヒアグラス（Paspalum notatum Flűgge）新品種「Tifton 9」の導入による季節生産性および低温伸長性の改善． Reviewed
森 康太郎，石井康之，山野明日香，濵野琴美，中原智晃，井戸田幸子
日本草地学会誌 58 ( 2 ) 83 - 89 2012.7
Language：Japanese Publishing type：Research paper (scientific journal)
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YAMANO Asuka, ISHII Yasuyuki, MORI Koutarou, HAMANO Kotomi, NAKAHARA Tomoaki, IDOTA Sachiko
Report of the Kyushu Branch of the Crop Science Society of Japan ( 78 ) 25 - 28 2012.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Crop Science Society of Japan
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ネピアグラスの効率的栄養苗生産に向けた品種・時期別苗生産の特徴と剪葉処理の効果（共著）
山野明日香，石井康之，森 康太郎，濱野琴美，中原智晃，井戸田幸子
日本作物学会九州支部会報 78 25 - 28 2012.5
Language：Japanese Publishing type：Research paper (scientific journal)
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ネピアグラス(Pennisetum purpureum Schumach)のカドミウム集積能力の推定およびカドミウム汚染土壌の浄化に向けた乾燥技術（共著）
濱野琴美，石井康之，山野明日香，森 康太郎，井戸田幸子，姜 東鎮，西脇亜也
日本作物学会九州支部会報 78 21 - 24 2012.5
Language：Japanese Publishing type：Research paper (scientific journal)
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Effect of weed control Management on Herbage Yield, Quality and Wintering Ability in the Established Dwarf Napiergrass (Pennisetum purpureum Schumach)."Jointly worked" Reviewed
Renny Fatmyah UTAMY, Yasuyuki ISHII, Sachiko IDOTA, Lizah KHAIRANI
日本暖地畜産学会 55 ( 1 ) 17 - 26 2012.4
Language：English Publishing type：Research paper (scientific journal)
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Comparison of 6 genotyopes napiergrass foggage grown in southern Kyushu, Japan for biomass use."Jointly worked" Reviewed
Lizah Khairani, Yasuyuki Ishii, Sachiko Idota, Renny Fatmyah Utamy, Aya Nishiwaki
Proceedings of the 4th Japan-China-Korea Grassland Conference 156 - 157 2012.3
Language：English Publishing type：Research paper (international conference proceedings)
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Effect of mother plant density on growth and efficiency of nursery production in dwarf napiergrass (Pennisetum purpureum Schumach) for 2 years after establishment."Jointly worked" Reviewed
Asuka Yamano, Yasuyuki Ishii, Koutarou Mori, Kotomi Hamano, Tomoaki Nakahara, Sachiko Idota
Proceedings of the 4th Japan-China-Korea Grassland Conference 154 - 155 2012.3
Language：English Publishing type：Research paper (international conference proceedings)
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Effects of shoot age and botanical fraction on structural carbohydrates in three varieties of napiergrass (Penisetum purpureum Schumach)"Jointly worked" Reviewed
Tomoaki Nakahara, Yasuyuki Ishii, Lizah Khairani, Koutarou Mori, Asuka Yamano, Kotomi Hamano, Sachiko Idota, Aya Nishiwaki
Proceedings of the 4th Japan-China-Korea Grassland Conference 152 - 153 2012.3
Language：English Publishing type：Research paper (international conference proceedings)