- 期刊
附土壤團粒化劑對紅壤抗蝕性及種子發芽影響之研究
A Study of Polisoil Spray on the Laterite Erodibility and the Influence of Plant Germination
摘要
噴植工法之引進與應用於台灣迄今已三十餘年，噴植資材及噴植施工技術仍持續在改良與研發，而土壤團粒化劑係目前廣泛被應用之噴植材料。本研究選取由琉球引進，近年來常應用於921地震崩塌地噴植用之土壤團粒化劑為試驗材料，調配1.63%、2.13%、2.63%、3.13%與對照組0%等五種濃度配比進行試驗；在單純使用土壤團粒化劑而不添加其它資材的情況下，發現土壤團粒化劑噴附量濃度愈高，土壤pH值和幾何平均粒徑亦相對增大，且在低基質張力(0∼2bar)時，保水性亦提高，但對飽和水力傳導度無顯著影響；然而當土壤團粒化劑濃度愈高，則紅土抗沖蝕性愈佳，但以百慕達草、相思樹為供試植物時，則種子發芽率及發芽勢皆相對降低。
並列摘要
Hydroseeding has been applied for more than thirty years in Taiwan, its apparatus and materials have been continuously ameliorated and invented. However, currently the Polisoil (aggregating agent) that has been generally used is one of the main Hydroseeding materials. In this study, Polisoil was chosen as the tested specimen that has introduced from Ryukyu and has used in large-scale bare slope after 921 earthquake. Five different concentrations of Polisoil (0%, 1.63%, 2.13%, 2.63%, 3.13%) were sprayed on laterite. We find that the pH, mean diameter of aggregates and water holding capacity of laterite will increase with the raising concentration of Polisoil, however, the saturated hydraulic conductivity did not change significantly if we only used Polysoil without collocating other materials. With raising concentration of Polisoil, the erosion resistance will be better, but when Bermuda grass and Taiwan Acacia were chosen as the experimental plants, the germination percentage and the germination potential of plants will decrease.