| Project/Area Number |
13460120
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Zootechnical science/Grassland science
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| Research Institution | University of Miyazaki |
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Principal Investigator |
SUGIMOTO Yasuhiro Miyazaki Univ., Faculty of Agriculture, Professor, 農学部, 教授 (20041030)
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| Co-Investigator(Kenkyū-buntansha) |
HIRATA Masahiko Miyazaki Univ., Faculty of Agric., Professor, 農学部, 助教授 (20156673)
HASEGAWA Nobumi Miyazaki Univ., Faculty of Agric., Associate professor, 農学部, 助教授 (50281217)
TAKAGI Masahiro Miyazaki Univ., Faculty of Agric., Associate professor, 農学部, 助教授 (70315357)
NISHIWAKI Aya Miyazaki Univ., Faculty of Agric., Associate professor, 農学部, 助教授 (60228244)
ITO Satoshi Miyazaki Univ., Faculty of Agric., Associate professor, 農学部, 助教授 (00231150)
園田 立信 宮崎大学, 農学部, 教授 (00040866)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥13,200,000 (Direct Cost: ¥13,200,000)
Fiscal Year 2003: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2002: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | Forest grazing cattle / Global Positioning System / Miscanthus sinensis / Undergrowth control / Silvipastoral system / Site analysis / Nitrate / Centipedegrass / 林内放牧 / 黒毛和種 / スギ林 / 硝酸濃度 / スギ / ヒノキ / DNA / 植物種の多様性 / センチピートグラス |
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| Research Abstract |
In 2002, land use and behavior of cattle grazing in a forest were monitored using a GPS. The animals grazed during moving between a resting area on a hill and a drinking point in lowland. They spent 10, 40 and 50% of day moving, grazing and with other activities, respectively. Miscanthus sinensis was the most preferred plant. In 2003, moving the drinking point was shown to be effective in modifying the home range of cattle. Grazing decreased biomass of undergrowth by 50-70%, showing considerable labor-saving advantage in undergrowth control. Although carrying capacity remained high for 3 years, it was recommended that plants avoided by animals should be removed at the end of grazing season to. ensure a high level of carrying capacity. There was a trend of increasing evergreen trees and decreasing deciduous trees and herbaceous plants with the progression of grazing years. which was mainly attributed to dynamics in plant selectivity by the animals. Site analysis of Morotsuka Village, Miyazaki Prefecture, showed a majority of timber-producing forest areas are suitable for the silvipastoral system. Although nitrate-nitrogen concentration of stream water in the grazing forest was higher than that in the non-grazing forest, the concentration was much lower than the standard for tap water (human drinking). Establishment and development of centipedegrass, a promising herbage species, were best on an eastern slope, with seeding by early summer, and were not affected by nitrogen fertilizer.
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