Papers - IDOTA Sachiko
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Establishment of rotational grazing system on dwarf napiergrass pasture oversown with Italian ryegrass by smallholder farmers of Japanese-Black breeding beef cows in southern Kyushu, Japan "jointly worked"
Yasuyuki Ishii, Kiichi Fukuyama, Takanori Iwakiri, Ahmad Wadi, Sachiko Idota
Proceedings of the 3rd Korea-China-Japan Joint Symposium on Grassland Agriculture and Livestock Production 218 - 219 2009.8
Language：English Publishing type：Research paper (international conference proceedings)
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Sustainable and environmentally conservative cropping system of dwarf napiergrass and Italian ryegrass in southern Kyushu, Japan "jointly worked"
Hadijah Hasyim, Yasuyuki Ishii, Sachiko Idota, ahmad Wadi, Yasuhiro Sugimoto
proceedings of the 3rd Korea-China-Japan Joint Sympossium on Grassland Agriculture and Livestock Production 60 - 61 2009.8
Language：English Publishing type：Research paper (international conference proceedings)
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Adaptability of maize-Italian ryegrass cropping to variable sowing dates by life cycle assessment in southern Kyushu, Japan. Reviewed
Y.N. Wang, Y. Ishii, A. Wadi, R.F. Utamy, S. Idota and Y.X. Shen.
Proceedings of the 21st International Grassland Congress 248 2008.8
Language：English Publishing type：Research paper (international conference proceedings)
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Effect of digested effluent of manure on the growth and yield of dwarf napiergrass in southern Kyushu, Japan Reviewed
H. Hasyim, Y. Ishii, A. Wadi, R.F. Utamy, Y. Wang, S. Idota and K. Fukuyama.
Proceedings of the 21st International Grassland Congress 228 2008.8
Language：English Publishing type：Research paper (international conference proceedings)
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Rotational grazing effects of dairy cows on yield and consumption in dwarf napiergrass at a paddok scale for 3 years from establishment in southern Kyushu, Japan"jointly worked" Reviewed
A. Wadi, Y. Ishii, H. Hasyim, R. F. Utamy, S. Idota, K. Fukuyama
Proceeding of XVI International grassland congress, Innner mongolia China 135 - 135 2008.6
Language：English Publishing type：Research paper (international conference proceedings)
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Adaptability of dwarf napiergrass to smallholder farmers of beef cows in southern Kyushu, Japan"jointly worked" Reviewed
Y. Ishii, A. Wadi, R.F. Utamy, Y. Wang, S. Fukagawa, S. Idota, K. Fukuyama
Proceeding of XVI International Grassland Congress, Inner mongolia, China 230 - 230 2008.6
Language：English Publishing type：Research paper (international conference proceedings)
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Yield trends and soil mineral changes in three summer winter forage cropping systems for 5 consecutive years in southern Kyushu, Japan"jointly worked" Reviewed
S. Idota, Y. Ishii
Proceeding of XVI International Grassland Congress 308 - 308 2008.6
Language：English Publishing type：Research paper (international conference proceedings)
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解膠ケイ酸がクリーピングベントグラスの成長と無機養分含量に及ぼす影響 共著 Reviewed
森下史康，井戸田幸子，明石良
宮崎大学農学部研究報告 54 65 - 68 2008.1
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Effects of peptized silica application on growth and mineral content in creeping bentgrass
Morishita Fumiyasu, Idota Sachiko, Akashi Ryo
Bulletin of the Faculty of Agriculture, Miyazaki University 54 65 - 68 2008.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Miyazaki University
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IDOTA Sachiko, ISHII Yasuyuki
Japanese journal of grassland science 53 ( 2 ) 93 - 101 2007.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
Maize (Zea mays L.), sorghum (Sorghum bicolor Moench) and Italian ryegrass (Lolium multiflorum Lam., IR) are major forage crops in southern Kyushu. This study tested 3 cropping systems typical to the region (double cropping of maize and IR (M-IR), double cropping of sorghum and IR (S-IR), and double cropping of maize (M-M)) for 5 years for their performance on the non-fertile, poorly permeable heavy soil. A single cropping of maize on fertile, permeable Andosol (M) was also tested for comparison. Herbage dry matter yields of summer crops (maize and sorghum) were more variable among years (CV=46.0-54.4%) than those of IR as a winter crop (CV=9.5-23.1%), with the low yields being associated with frequent attacks of typhoons and heavy rainfalls. Consequently, in M-IR and S-IR, incorporation of IR into the cropping system decreased the year-to-year variability in herbage yield (31.2 and 48.3%, respectively). Maize on Andosol (M) showed 2-34% higher yields than the 1st-crop maize on the heavy soil (M-M). The results confirm the relatively low productivity of the heavy soil and show the advantage of combining a winter crop with a summer crop for stabilizing annual herbage production on the heavy soil in southern Kyushu.
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Annual Variation in Herbage Dry Matter Yield under Some Forage Cropping Systems on the Heavy Soil in Southern Kyushu."jointly worked" Reviewed
Sachiko Idota, Yasuyuki Ishii
Japanese Journal of Grassland Science 53 ( 2 ) 93 - 101 2007.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Effect of level of manure application on leaf and tiller growth in pot-cultured napiergrass (Pennisetum purpureum Schumach)（共著）
Hadijah Hasyim, Ahmad Wadi, Sachiko Idota, Yasuyuki Ishii
宮崎大学農学部研究報告 53 ( 1・2 ) 59 - 66 2007.3
Language：English Publishing type：Research paper (bulletin of university, research institution)
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チベット高原北部におけるヤク（Bos grunniens）の放牧季節の違いが金露梅（Potentilla fruticosa）優占草地の植物の種多様性と現存量に及ぼす影響. Reviewed
李 国梅，長谷川信美，宋 仁徳，井戸田幸子，王 有良，馮 生青
Animal Behaviour and Management 43 ( 1 ) 1 - 8 2007.3
Language：Japanese Publishing type：Research paper (scientific journal)
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Effect of level of Manure Application on Leaf and Tiller Growth in Pot-cultured Napiergrass "jointly worked" Reviewed
Hasyim Hadijah, Wadi Ahmad, Idota Sachiko, Ishii Yasuyuki
Bullitetin of the Faculty of Agriculture, University of Miyazaki 53 59 - 65 2007.3
Language：English Publishing type：Research paper (bulletin of university, research institution)
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堆肥の施用量がポット栽培したネピアグラス(Pennisetum purpureum Schumach)の葉と分げつの成長に及ぼす影響
Hasym Hadijah, Wadi Ahmad, 井戸田 幸子, 石井 康之
宮崎大学農学部研究報告 53 ( 1 ) 59 - 65 2007.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：宮崎大学
ネピアグラスの成長に及ぼす堆肥から無機化した養分量の影響を検討するため、異なる堆肥施用量の下でポット栽培したネピアグラスの分げつと葉の成長および個体当りの成長形質を測定した。堆肥施用量の増加に伴い、葉の成長は主として茎当りの総展開葉数および分げつ数の増加により促進された。分げつ数および平均分げつ重は、堆肥施用量が中程度（4kg／m2）のレベルまで増加するにつれて増加した。植物体内の乾物分配については、茎（葉鞘を含む）に対する葉身の比率や地下部に対する地上部の比率は生育に伴い低下したが、堆肥施用量の影響はほとんど認められなかった。堆肥施用量の増加により葉と茎の成長が促進され、それが葉面積指数（LAI）の増加をもたらし、さらに個体群成長速度（CGR）の増加をもたらした。CGRはLAIとの間に、全LAIを通して正の直線関係が成り立った。堆肥施用により、高温の盛夏期間にCGRが最も高くなったのは、広範囲のLAIの下で純同化率がほぼ一定であったことによっており、盛夏期間に堆肥からの無機化速度が高まったことが示唆された。
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不良土壌で栽培される飼料作物の乾物生産と無機養分収支 Reviewed
井戸田幸子
2007.1
Language：Japanese Publishing type：Doctoral thesis
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Li Guomei, HASEGAWA Nobumi, SONG Rende, IDOTA Sachiko, WANG Youliang, FENG Shengqing
Animal Behaviour and Management 43 ( 1 ) 1 - 8 2007
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Soceity of Livestock Management
Effect of rotational grazing of yak in two (warm and cold) seasons for over 20 years on species diversity and biomass of plants was investigated in Potentilla fruticosa rangeland in northern Qinghai-Tibetan Plateau. In the paddock grazed in warm seasons (WSP), 37 species (Gramineae : Cyperaceae : forbs : shrubs = 6 : 5 : 23 : 3) appeared and 44 (Gramineae : Cyperaceae : forbs : shrubs=7 : 6 : 27 : 4) did in that grazed in cold seasons (CSP). WSP was smaller in values of Richness, Shannon-Wiener, Simpson and Pielou evenness indices than CSP. Vegetation coverage and community height were significantly lower in WSP than in CSP (p<0.01). Number of plant species was significantly smaller in WSP (7-16 species/m^2) than in CSP (17-22 species/m^2) (p0.001). Aboveground biomass of Gramineae was significantly lower in WSP than in CSP (p<0.01). Subdominant species in WSP were Kobresia humilis, Leontopodium nanwn and Potentilla anserina which were short in height and grazing-resistant, while those in CSP were Poa pratensis, Elymus nutans and Kobresia capillifolia which were tall in height. It was considered that long-term rotational grazing of yak in warm and cold seasons decreased floral diversity and biomass of plants, especially in Gramineae in WSP as compared with those in CSP, and the deterioration was going on in WSP.
DOI： 10.20652/abm.43.1_1
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Botanical composition, aboveground biomass and grazing behaviour of yak (Bos grunniens) in southern rangeland of Qinghai Province, China. Reviewed
Song Rende, Hasegawa Nobumi, Idota Sachiko, Li Guomei, Nishiwaki Aya, Jiu Cairen, Xu Ning, Zhou Qingping
Proceedings of the 2nd China- Japan-Korea Grassland Conference 289 - 291 2006.8
Language：English Publishing type：Research paper (international conference proceedings)
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Effect of long-term seasonal grazing of yak (Bos grunniens) on botanical diversity of Potentilla fruticosa alpine rangeland in Qing-Zang Plateau. Reviewed
Li Guomei, Idota Sachiko, Hasegawa Nobumi, Song Rende, Wang Youliang and Feng Shengqing
Proceedings of the 2nd China- Japan-Korea Grassland Conference 149 - 151 2006.8
Language：English Publishing type：Research paper (international conference proceedings)
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Differences in yak (Bos grunniens) grazing behaviour and chemical composition of feces in the southern and northern Qinghai-Tibetan Plateau in China. Reviewed
Hasegawa Nobumi, Song Rende, Kozono Masaharu, Idota Sachiko, Nishiwaki Aya, Li Guomei, Fukuda Akira, Zhou Qingping.
Proceedings of the 2nd China- Japan-Korea Grassland Conference 286 - 288 2006.8
Language：English Publishing type：Research paper (international conference proceedings)