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Poplars and willows form an important component of forestry and agricultural systems, providing a wide range of wood and non-wood products. This book synthesizes research on poplars and willows, providing a practical worldwide overview and guide to their basic characteristics, cultivation and use, issues, problems and trends. Prominence is given to environmental benefits and the importance of poplar and willow cultivation in meeting the needs of people and communities, sustainable livelihoods, land use and development.
Different species of the genus Populus, also known as poplars, are of great economic importance as major sources of timber, pulp and fiber. Salix species, or willows, have become very important sources of biomass for bioenergy. Both are characterized by their fast-growing trees, being asexually propagated, and having several species growing in riparian areas prone to flooding. This book studies the cultivation, applications and environmental benefits of poplars and willows. The first chapter begins with a review of the ecological importance and sustainable development of poplar forests in NE China and possible influences on soil properties. Chapter two reviews the properties and practical purposes of willows. Chapter three outlines an experimental project for growing, harvesting, and utilizing willow trees in Japan. Chapter four studies the responses of poplars and willows during flooding. The last chapter examines the application of organic wastes from industry and municipalities at short-rotation willow and poplar plantations.
In recent years there has been increased interest in growing willow and poplar trees, as fast-growing species that have several purposes, including use as biofuels for energy production. However, silviculture of these trees has been constrained by diseases such as Melampsora rusts. This book provides a comprehensive review of over two decades of extensive study of the rust diseases affecting willow and poplar. It provides insights into the population biology of Melampsora rusts in Europe, China, India and Chile, the genetics of their resistance, and their interaction with their hosts. The book offers information essential to the development of effective and sustainable disease control measures including the use of willow genotype mixtures and biological control agents.