| Budget Amount *help |
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1998: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Research Abstract |
Recently situation of agriculture has changed very much. The role of agriculture was production of the food and the raw material in old times. However, the other rolls of agriculture which keep environment beautiful and ecologically sound, became more important. Moreover, it is recognized that the woods and the grassland have effects to keep the biological diversity. In this research, the environmental effects of the vegetation which exist nearby agricultural land were evaluated.
1. Extremely various grass vegetation existed in each area according to the time length after farming were abandoned, frequency of mowing, and the intensity of trampling etc. But, the difference between regions was comparatively small.
2. The model grass vegetation were grown up in containers. The effect of the difference of the mowing frequency on growth of Imperata, Artemisia, and Ixeris were investigated. As a result, Imperata and Artemisia have tolerance to mowing, but Ixeris was a little tolerant.
3. The change in distribution of bamboo forests in the Osaka Sennan district, which had been represented on 1/25000 topographical maps prepared in 1947, 1970, and 1993, were studied. The number of bamboo forest sites was counted and the area of each site was measured. The total area of bamboo forests in the district under examination was about 187 ha in 1947. This had increased to 207 ha by 1993.
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