A Study on Application of PVA for Hydroseeding and Soil Aggregation Enhancement in Soil and Water Conservation

• Main Authors: Yuan-Chih Lee, 李元智
• Other Authors: 鄭皆達
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/88790361467073614584

博士 === 國立中興大學 === 水土保持學系所 === 97 === Erosion and landslides often occur in Taiwan during June-October typhoon season as a result of steep topography, young and weak geological formations as well as heavy rainfalls. Many exposed slopelands caused by landslides need to be revegetated as soon as possible. Polymer materials are widely used commercially. However, they are seldom applied to the conservation of soil and water or plants cultivation. Therefore whether the polymers Polyvinyl Alcohol（PVA） can be used as adhesives and soil conditioners to enhance the adhesive for protection against erosion of soil are important topics in the study of soil and water conservation. However the inhibition of seeds germination by the PVA was seldom discussed. In this study, the effects of PVA on the germination of Bahia grass, Bermuda grass, Carpet grass, perennial ryegrass, Chinese Lespedeza, Flame Gold-rain tree and, Purple bean （Siratro） seeds are examined. The results of this study showed that PVA is effective for use in slopeland hydroseeding to promote the aggregation stability of yellow soil, red soil, and muddy stone, and reduce soil erosion. The results also indicate that the 2％ PVA wouldn’t inhibit the percentage germination of the plant seeds. It is believed that the PVA will be a suitable adhesive and soil conditioner in hydro seeding for soil and conservation.