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Abstract
The collapse of slope due to the internal and external factors, which complied with the geographical features that suited local circumstances, therefore, the slope protection becomes very important. The collapse of the partial road in the central Taiwan caused by 921 earthquakes in 1999, and vegetation on the landsides was destroyed seriously. Additional soil erosion and debris flow may happen when heavy raining or earthquakes if the slope is not protected. As a result, the affection of the transportation and tourism cause of the road interrupter. The collapse of slope became more steep cause by earthquake, downpour or road building, so some of traditional vegetation engineering methods can not be used on the slop. The purpose of this study was to evaluate the efficiency of several vegetation engineering methods, including 1.anchoring slop, 2.seeding with adhesive, and 3.directly spouting vegetation. Through testing with the different engineering methods at the same place, the obtained results showed the best average plant recovery was in directly spouting vegetation; for a steep slop, the best vegetation engineering methods was in square frame plots had highest resistance to soil erosion; for the uncovered land of rebuilding urgently, the best vegetation engineering methods was in directly spouting vegetation engineering methods had accelerate planet recovery; however the seeding with adhesive is economical. On the other hand, in order to realize the effect of the rebuilding collapse land and recovering slope and plant alternating, in addition to artificial rebuilding vegetation engineering mentioned above, the introduction of herbaceous and woody plant seeds to match up local soil can accelerate the plant succession and the restoration of landslides. By the usage of hydro seeding to protect the slope can speed the process of project and beautify the environment. Expecting a good protective effect on slope in the initial time of projecting depends much on the cohesive agent. This study uses Festura arundinacea, Chloris gavana Kunth, Bermuda grass, and Bahia grass, as the primary experimental plants to probe the cohesive agent affecting on protective effect of slope land surface and initial growth of plants of plants, expect to offer the reference in the hydro seeding project hereafter.
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