A study on the mixed seeding technology of woody plants by spraying thick cultivative base
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概要
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The objective of the study was to investigate the development of the plant communities by mixed seeding of woody plant species with the thick cultivative base on cut bedrock slopes. Two experimental works were conducted. One of the experimental works had two treatment conditions; cultivative base of organic matter and that of organic matter mixed with mineral soil. Another works had two treatment conditions by seeding woody plant species with exotic grass plant species and without them. The results of investigation for 10 years were as follows; 1) The structure of woody plant community greatly varied by the main materials of cultivative base. 2) Pioneer species declined more rapidly in the cultivative base condition of only organic matter than in that of organic matter mixed with mineral soil. 3) Application of exotic grass plants had an large effect on the establishment of a woody plants community. 4) In the case of a woody plants community with thick cultivative base, seeding woody plant species without exotic grass plant species was effective. In this study, the height growth of seeded woody plant species on the cut bedrock slope were different from the height growth in the natural conditions. It was elucidated that the changes of the density varied with woody plant species. From the results of this investigation, in order to develop the woody plants seeding technology by spraying thick cultivative base, two attitudes are thought to be necessary as follows; 1) A suitable main material of cultivative base that maintains the sufficient germination and growth of main species should be selected. 2) It is important to develop a technique to determine the expected density of seedlings and saplings, based on the characteristics of height growth and survivorships by woody plant species on the cut slopes.
- 日本緑化工学会の論文