Papers - IDOTA Sachiko
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Year-Round Forage Yield Stability through a System Combining Triple-Maize Crops with Winter Barley in Kyushu, Japan. Reviewed
Yingkui Yang, Yasuyuki Ishii, Sachiko Idota
American Journal of Agricultural and Biological Sciences 2016.1
Language：English Publishing type：Research paper (scientific journal)
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Ishii Y., Yamano A., Idota S.
International Journal of Agronomy 2016 2016
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：International Journal of Agronomy
© 2016 Yasuyuki Ishii et al.The effects of short-day (SD) and gibberellic acid (GA3) treatments on promoting vegetative propagation during the summer were examined in Napier grass (Pennisetum purpureum Schumach). A dwarf variety of late heading type (DL) Napier grass was exposed to three SD treatments (5, 10, and 20 short days plus a spray of 400 ppm GA3 solution following each SD treatment, GASD) or no treatment (control). Additionally, then, a dwarf variety of early heading (DE) and the normal variety of Merkeron (ME) were exposed to 10 days of GA-SD treatment together with nontreated controls. For DL and DE, GA-SD treatments showed the following effects: 10-day GA-SD treatment increased significantly (P < 0.05) the length of lateral tiller buds, maintained a high rooting percentage, and increased the diameter of the tiller buds. This resulted in a taller plant, one with enhanced tiller numbers, and thus a greater number of established nursery plants for the two dwarf varieties. In contrast, there was only a limited positive effect of the GA-SD treatments on the normal variety, ME. Thus, 10 days of GA-SD treatment was judged to be the most effective treatment for promoting lateral tiller bud elongation and early maturation in tiller buds for the two dwarf varieties of Napier grass.
DOI： 10.1155/2016/9606914
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Utamy R., Ishii Y., Idota S., Khairani L., Khairani L., Fukuyama K.
Journal of Agriculture and Rural Development in the Tropics and Subtropics 117 ( 1 ) 11 - 19 2016
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Agriculture and Rural Development in the Tropics and Subtropics
© 2016, Kassel University Press GmbH. All rights reserved.Since dwarf napiergrass (Pennisetum purpureum Schumach.) must be propagated vegetatively due to lack of viable seeds, root splitting and stem cuttings are generally used to obtain true-to-type plant populations. These ordinary methods are laborious and costly, and are the greatest barriers for expanding the cultivation area of this crop. The objectives of this research were to develop nursery production of dwarf napiergrass in cell trays and to compare the efficiency of mechanical versus manual methods for cell-tray propagation and field transplanting. After defoliation of herbage either by a sickle (manually) or hand-mowing machine, every potential aerial tiller bud was cut to a single one for transplanting into cell trays as stem cuttings and placed in a glasshouse over winter. The following June, nursery plants were trimmed to a 25-cm length and transplanted in an experimental field (sandy soil) with 20,000 plants ha−1 either by shovel (manually) or Welsh onion planter. Labour time was recorded for each process. The manual defoliation of plants required 44 % more labour time for preparing the stem cuttings (0.73 person-min. stemcutting−1) compared to using hand-mowing machinery (0.51 person-min. stem-cutting −1). In contrast, labour time for transplanting required an extra 0.30 person-min. m−2 (14 %) using the machinery compared to manual transplanting, possibly due to the limited plot size for machinery operation. The transplanting method had no significant effect on plant establishment or plant growth, except for herbage yield 110 days after planting. Defoliation of herbage by machinery, production using a cell-tray nursery and mechanical transplanting reduced the labour intensity of dwarf napiergrass propagation.
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Ishii Y., Ishii Y., Iki Y., Inoue K., Nagata S., Idota S., Yokota M., Nishiwaki A.
Scientifica 2016 2016
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Scientifica
© 2016 Yasuyuki Ishii et al.After the infection of foot-and-mouth disease outbreaks in Miyazaki, Japan, in 2010, cattle and swine were slaughtered and buried in a site of 100 ha, where weed control is difficult and costly since lands are unlevelled and prohibited to be plowed for 3 years. To consider the adaptability of napiergrass (Pennisetum purpureum Schumach.) to the animal burial site for weed control, two napiergrass varieties, normal Wruk wona (WK) and dwarf late-heading variety (DL), were transplanted, compared with sowing of maize (MZ) and sorghum (SR) in both burial (BU) and neighboring bordered area (BO) in mid-June 2011. Even though several weed control methods were subjected to lands, MZ and SR failed to be established stably at only 1/3-1/2 due to the suppression of growth by indigenous weeds, while WK and DL successfully established as high as 82-91% and 73-85%, respectively, in 2011. The poor establishment of MZ and SR after sowing tended to be increased with the year from establishment. Plant dry matter yield and cellulose concentration were the highest in WK in 2011, while overwintering ability was constantly higher in DL in the 3 years. It is necessary to consider the utilization of forage plants on the animal burial site.
DOI： 10.1155/2016/6532160
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Cadmium Phytoremediation Potential of Napiergrass Cultivated in Kyushu, Japan. Reviewed
Yasuyuki Ishii, Kotomi Hamano, Dong-Jin Kang, Sachiko Idota, and Aya Nishiwaki
Applied and Environmental Soil Science 1 - 6 2015.12
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.1155/2015/756270
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Composting characteristics of bovine manure produced by conventional stacked processing and an experimental small-scale apparatus. Reviewed
Yusuke Kajiya, Yasuyuki Ishii, Kiichi Fukuyama, Sachiko Idota
Proceedings of the 23nd International Grassland Congress, New Delhi, India, (2015) 2015.11
Language：English Publishing type：Research paper (international conference proceedings)
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Idota, S., Ishii, Y. and Fukuyama, K.
Agricultural Sciences 6 1003 - 1013 2015.9
Language：English Publishing type：Research paper (scientific journal)
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Precise optimization of poultry manure composting using an experimental small-scale apparatus
Kajiya Y., Ishii Y., Fukuyama K., Idota S.
Journal of Biological Sciences 15 ( 1 ) 40 - 44 2015.8
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Biological Sciences
© 2015 Asian Network for Scientific Information.Ordinary stacked composting from bovine and poultry manures requires large amounts of materials and it is difficult to conduct uniform and repeated processing. While precise optimization using bovine manure and an experimental small-scale apparatus (Kaguyahime) has already been accomplished, poultry manure has readily decomposable components compared to bovine manure. The objective of this study was to determine the precise optimization of poultry manure composting using the same small-scale apparatus, filled with 7 kg of manure that was dried under sunlight and different amounts of sawdust as subsidiary material. In the preliminary experiment, the maximum temperature for the first 7 days of composting reached over 60°C when the moisture content of the mixture decreased below 65%, while the manure-to-sawdust ratio negligibly affected the temperature increase. Under the preliminary conditions, the maximum temperature of poultry manure mixed with sawdust was over 70°C within 2 days after composting and the thermophile phase above 60 and 55°C continued for an additional 27 and 18 h, respectively. The pH and electrical conductivity of poultry manure composted for 32 days remained at 9.1 and 6.6 mS cm<sup>-1,</sup> respectively, which indicates the manure is safe for land application.
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Precise Optimization of Poultry Manure Composting Using an Experimental Reviewed
Yusuke Kajiya, Yasuyuki Ishii, Kiichi Fukuyama, Sachiko Idota
Journal of Biological Sciences 2015.5
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3923/jbs.2015.
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Development of mechanical methods for cell-tray propagation and field transplanting of dwarf napiergrass (Pennisetum purpureum Schumach.) Reviewed
Renny Fatmyah Utamy, Yasuyuki Ishii, Sachiko Idota, Lizah Khairani, Kiichi Fukuyama
Journal of Agriculture and Rural Development in the Tropics and Subtropics 117 ( 1 ) 11 - 19 2015.1
Language：English Publishing type：Research paper (scientific journal)
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Ishii Yasuyuki, Iwamura Koji, Obata Hisashi, Tateyama Matsuo, Suzaki Tetsuya, Arima Norio, Kurogi Hisashi, Idota Sachiko
Jpn J Grassl Sci 61 ( 1 ) 27 - 30 2015
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japanese Society of Grassland Science
DOI： 10.14941/grass.61.27
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Effect of Dehydrated Digested Effluentof Manure on Yield and Quality of Annual Forages and Soil Chemical Properties in Southern Kyushu, Japan Reviewed
Sachiko Idota, Yasuyuki Ishii
Agricultural Sciences 2014 ( 5 ) 843 - 849 2014.8
Language：English Publishing type：Research paper (scientific journal)
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Precise optimiz ation of Cattle Manure Composting Using an Experimental Small-Scale Instrument Reviewed
Yusuke Kajiya, Yasuyuki Ishii, Kiichi Fukuyama and Sachiko Idota
Journal of Biological Science 1 - 5 2014.3
Language：English Publishing type：Research paper (scientific journal)
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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
Journal of Biological Science 1 - 6 2014.3
Language：English Publishing type：Research paper (scientific journal)
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Effect of digested effluent of manure on soil nutrient content and production of dwarf Napier grass in southern Kyushu, Japan Reviewed
Hadijah Hasyim, Yasuyuki Ishii, Ahmad Wadi, Sachiko Idota
Journal of Agronomy 1 - 11 2014.1
Language：English Publishing type：Research paper (scientific journal)
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YANG Jiahua, IDOTA Sachiko, TOBISA Manabu, LI Guomei, SONG Rende, LI Xiaoqin, LI Haizhu, TASUMI Masahiro, HASEGAWA Nobumi
Nihon Souchi Gakkai Kyushu Shibukaiho 57 ( 2 ) 105 - 113 2014
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Warm Regional Society of Animal Science, Japan
In the alpine grazing rangeland of the Tibetan Plateau, where three major rivers originate in China, ten sites (Plot 1 to10, 20 m × 20 m each) were selected in the habitats of plateau pikas (Ochotona curzoniae) in August 2012 for investigatingthe relationship among population density of pleateau pikas, vegetation and soil physical and chemical properties. Thepopulation density was estimated by counting the active (opened) burrows with a filling-burrow method after counting thenumber of burrow openings in each plot. A vegetational survey was conducted with quadrat methods in those plots. Soilsamples were collected from 0 to 5 cm depth and physical and chemical properties were determined. The burrow openingdensity (BD) ranged from 0 to 133/400 m2 and the available burrow opening density (ABD) ranged from 5 to 63/400 m2except 0 in Plot 1, 2 and 3. BD was negatively correlated with plant height (r = -0.652, P < 0.05) and tended to be donewith coverage (r = -0.600, P < 0.1) in vegetation and positively with bulk density (r = 0.607, P < 0.1) and negatively withSO42- content (r = -0.572, P < 0.1) in soil. ABD tended to be correlated with plant height (r = -0.562, P < 0.1) and bulkdensity (r = 0.593, P < 0.1). Generalized liner model analyses showed that BD and ABD were affected positively by soilhardness and TN and negatively by plant height (P < 0.001). BD only was negatively affected by TC in soil (P < 0.001).With cation and anion contents in soil, BD and ABD were negatively affected by Ca2+, NH4+ and SO42- (P < 0.001), and alsoonly BD was affected by Mg2+ (P < 0.001). It was suggested that the increase of population density of plateau pikas mightbe related with the lowered plant height, increases of soil hardness and the TN content and decrease of the TC contentwhere domestic herbivores have grazed intensively.
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YANG Jiahua, IDOTA Sachiko, LI Guomei, SONG Rende, GUO Zhihong, LI Xiaoqin, LI Haizhu, TOBISA Manabu, TASUMI Masahiro, FUKUDA Akira, NISHIWAKI Aya, KASHIMURA Atsushi, SAKAMOTO Shinsuke H., MORITA Tetsuo, HASEGAWA Nobumi
Nihon Souchi Gakkai Kyushu Shibukaiho 57 ( 1 ) 37 - 47 2014
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Warm Regional Society of Animal Science, Japan
In the alpine grazing rangeland of the Tibetan Plateau, where three major rivers originate in China, four sites (Plot I to IV, 50 m × 50 m each) in 2011, and ten sites (Plot 1 to 10, 20 m × 20 m each) in 2012 in the habitats of plateau pikas (Ochotona curzoniae) were selected in order to investigate the relationship between the highly varied individual density of pleateau pikas and vegetation. The individual density was roughly estimated by counting the active burrow openings with a filling-burrow opening method. A vegetation survey was conducted with one or both quadrat and line transect methods in those plots. The active burrow opening density was significantly correlated with the burrow opening density (r = 0.996, P < 0.01). The active opening density differed significantly among the plots (P < 0.001), and that in Plot I was smallest (4/2,500 m2/day). The density in Plot IV (305/2,500 m2/day) was greatest in 2011, and ranged from zeroes in Plots 1, 2 and 3 to 63/400 m2/day in Plot 10 in 2012. Indices for floristic diversity in Plot I were highest and in Plot II were lowest in 2011, and in Plot 3 were highest and in Plot 4 were lowest in 2012. Generalized liner model analyses showed that the burrow opening density was affected positively by vegetation cover and number of plant species, and negatively by aboveground biomass and plant height, and that the active burrow opening density was affected positively by vegetation cover and number of plant species, and negatively by plant height. These results suggested that plateau pikas would select sites with comparatively higher vegetation cover as their habitats from sites with lower plant height and lower vegetation cover where domestic animals have grazed.
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原材料の異なる牛糞堆肥の無機化特性と暖地型牧草カラードギニアグラスへの施肥効果 Reviewed
梶谷祐介，井戸田幸子，石井康之，福山喜一
日本暖地畜産学会報 56 ( 2 ) 143 - 150 2013.10
Language：Japanese Publishing type：Research paper (scientific journal)
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Adaptability and extension activity of dwarf napiergrass in southern Kyushu and elsewhere since its introduction to Japan 15 years ago. Reviewed
Yasuyuki Ishii, Dong-Jin Kang, Asuka Yamano, Sachiko Idota, and Kiichi Fukuyama
Proceedings of the 22nd International Grassland Congress 293 - 296 2013.9
Language：English Publishing type：Research paper (international conference proceedings)
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Change of behavior of Bos grunniens in the alpine rangeland in the eastern Tibetan Plateau. Reviewed
Nobumi Hasegawa, Rende Song, Guomei Li, Xumin Cao, Masahiro Tasumi, Sachiko Idota and Akira Fukuda
Proceedings of the 22nd International Grassland Congress 1177 - 1178 2013.9
Language：English Publishing type：Research paper (international conference proceedings)