| Project/Area Number |
02660285
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
畜産学(含草地学)
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| Research Institution | Kitasato University |
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Principal Investigator |
KOBAYASHI Hiroshi School of Veterinary Medicine and Animal Sciences, Professor, 獣医畜産学部, 教授 (80050615)
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| Co-Investigator(Kenkyū-buntansha) |
SUGIURA Toshihiro School of Veterinary Medicine and Animal Sciences, Lecturer, 獣医畜産学部, 講師 (30146518)
SUZUKI Shozo School of Veterinary Medicine and Animal Sciences, Associate Professor, 獣医畜産学部, 助教授 (30137898)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1991: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1990: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | grassland soil / soil structure / forage roots / root mat / superficial roots / マルチ裁培 / 永年草地 / 牧草根群 |
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| Research Abstract |
On a permanent grassland, it was observed that living and dead roots and subterranean stems were accumulated in the ground surface. They were divided into three layers. The topmost layer was composed of plant material with no soil particles and was called R-layer. The second intermediate layer was made of soil particles bound by living and dead roots and was called the RS-layer. Both the R and the RS-layers could be lifted together easily away from the underlying layer in field.
The lowest layer was called the Slayer and was composed of soil with a small quantity of plant material. The two uppermost layers taken together are referred to as the root mat. The thickness of the root mat increased with age. In comparing the R-layer with the RS-layer, the change in the thickness of the R-layer was more affected by time.
This results suggests that the root mat formation is dependent on the accumulation of grass roots which can not penetrate into the ground.
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