Influence of Sheep Wool on Slope Greening

ABSTRACT

Positive influence of wool mixed with soil on slope stability and its greening were examined. Mixtures of poor quality wool as well as polyester and polypropylene fibers with soil were obtained. The mixture was used to cover meandrically arranged ropes installed on the slope. After several weeks, intense greening of the slope was observed. Grass cover grown from seeds sown on the slope was very diverse, depending on types of fibers used for soil reinforcements. In places covered with soil mixed with wool, intense and dark green grass tillers were observed. In order to determine influence of wool on intense grass growth, progress of wool biodegradation was studied. Additionally, the content of different forms of nitrogen in soil during slope exploitation was analyzed. Wool biodegradation was investigated during observations with electron scanning microscope. It was revealed that biological damage of wool was accelerated by mechanical damage of fibers, that took place during bale opening and mixing wool with soil. As a result of biodegradation of wool keratin organic nitrogen was released. Due to ammonification process, it was converted into ammonium and later, via nitrification, into nitrate form. Both forms were available for growing grass and promoted its quick development.

摘要

研究了羊毛混泥土对边坡稳定性及绿化的积极影响。获得了劣质羊毛以及聚酯和聚丙烯纤维与土壤的混合物。该混合物用于覆盖安装在斜坡上的弯曲布置的绳索。几个星期后，观察到强烈的坡度绿化。从播种在斜坡上的种子生长的草覆盖是非常多样的，这取决于土壤增强材料所用的纤维类型。在覆盖有羊毛的土壤覆盖的地方，观察到强烈和深绿色的草分蘖。为了确定羊毛对强草生长的影响，研究了羊毛生物降解的研究进展。此外，还分析了坡面开发过程中土壤中不同形态氮的含量。在电子扫描显微镜下观察羊毛的生物降解。结果表明，开捆、毛土混合过程中纤维的机械损伤加速了羊毛的生物损伤。作为羊毛角蛋白生物降解的结果，有机氮被释放。由于氨化过程，它被转化成铵，随后通过硝化转化成硝酸盐形式。这两种形式都可用于种草，促进其快速发展。

KEYWORDS:

• Wool
• soil reinforcement
• biodegradation
• nitrogen content
• fertilizer

关键词:

• 羊毛
• 土壤加固
• 生物降解
• 氮含量
• 肥料