Study on the Germination and Root Growth Property of Applicable Vegetation Stakes in Taiwan

• Main Authors: Hsi-Jung Wu, 吳錫融
• Other Authors: Shin-Hwei Lin
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/60701472337671857365

碩士 === 國立中興大學 === 水土保持學系所 === 96 === In recent years under Ecological Engineering Methods advanced, staking and wattling becomes a method constantly applies to slope management. It uses to manage general dig and fill or shallow layer collapse slope, and its purpose that stabilizes soil, improves gradient, reduces soil washout, also be conducive to provide vegetation growable conditions. There are many kind of stakes when use the staking and wattling method. While choosing the vegetation stakes, due to different kinds of vegetation stakes, their growth rates in the initial stage are not exactly same and the time to germinate and root early or late is variational. Therefore, the most part of demand to choose vegetation stakes is to achieve vegetation recovery and stabilize slope in a short time. It is rare that the study of these aspect. In such circumstances, this study attends to provide specific suggestions for staking and wattling with a growth observation experiment in shaded and unshaded conditions during thirteen weeks by using eight kinds of common vegetation stakes in Taiwan including Ficus microcarpa L. f., Salix warburgii O. Seem., Hibiscus tiliaceus L., Cordia dichotoma Forst. f., Pongamia pinnata (L.) Pierre ex Merr., Ficus superb Miq. var. japonica Miq., Bischofia javanica Blume, and Lagerstroemia subcostata Koehne. And in the growth experiment, using accumulative biomass to analyze the variation in different conditions and growth rates, and evaluate the stability of slope by using mechanics tests. Results obtained are summarized as follows: The time for vegetation stakes to germinate and root in unshaded situation is mostly earlier than in shaded situation about one to three weeks, only Cordia dichotoma Forst. f., Ficus superb Miq. var. japonica Miq., and Lagerstroemia subcostata Koehne have no influence in shaded situation in germination. Hibiscus tiliaceus L. and Bischofia javanica Blume are the vegetation stakes that the time to germinate and root in shaded situation is earlier than in unshaded situation. Combined with germination and rootage trend, Bischofia javanica Blume is suitable to grow in shaded situation, and others seven kinds of vegetation stakes are on the contrary. Compared the starting germination and rootage week with bud and root biomass, the growth situation of Salix warburgii O. Seem. is the best among eight kinds of stakes in unshaded treatment ,and the growth situation of Hibiscus tiliaceus L. is the best among eight kinds of stakes in shaded treatment. According to the result in pull-out test, the maximum pull-out resistance forces and the total root diameter area of Salix warburgii O. Seem., Hibiscus tiliaceus L., and Cordia dichotoma Forst. f. are related. Among eight kinds of vegetation stakes, the maximum pull-out resistance force of Hibiscus tiliaceus L. reaches to 148.8kg Conclusively, the vegetation stakes grow slowly and the growth trend is comparative lower in shaded situation. Consequently, when using the staking and wattling method actuality, it should be reduce shaded effect to increase the sun shine quantity, and it will contribute to the growth of vegetation stakes.