Dış Ortam Koşullarında Bazı Poliüretan Esaslı Üst Yüzey Sistemlerinin Odun Yüzeyini Koruma Performansı

Abstract

IntroductionTree growth serves as an important means of capturing and storing atmospheric carbon in vegetation, soil, and biomass products. The United Nations Framework Convention on Climate Change has recognized the importance of plantation forestry as a greenhouse gas mitigation option, as well as the need to monitor, preserve, and enhance terrestrial carbon stocks (Updegraff et al., 2004). Due to fast growth and better silvicultural practices and management, plantation forestry has an edge over natural forests. Projections of the International Centre for Research in Agroforestry suggest that significant funds could potentially be available to finance sustainable rural development and adaptation to climate change, as the carbon market may exceed US $1 trillion by 2025 (ICRAF, 2009). Poplar (Populus deltoides W.Bartram ex Marshall), a short-rotation plantation crop, has received wide acceptance during the last 3 decades in India. Due to its fast growing habit, its compatibility with agriculture crops, and high industrial requirements, the species is widely grown in Indo-Gangetic region of the country. An area of 312,000 ha is planted with P. deltoides in the country, out of which 60% is block plantation and 40% is bund plantation (ICFRE, 2012). The tree is harvested at a short rotation of 7-10 years, which provides a yield of 150-200 m 3 ha -1 (mean annual increment of 20-25 m 3 ha -1 per year) in block plantations and 12-20 m 3 ha -1 (mean annual increment of 2-3 m 3 ha -1 per year) in boundary plantations (Kishwan and Kumar, 2013). The wood of the tree is mainly used for plywood manufacturing in India. The branches, tops, and roots of the trees are also used by plywood industries as fuel, which helps reduce fossil fuel use. Due to its fast growth and wider adoptability, the tree has huge potential to sequester carbon and mitigate CO 2 from the atmosphere (