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University of Adelaide (2013)

Soil-plant interactions and establishment of woody perennials on hostile soils

Azam, Md Gausul

Titre : Soil-plant interactions and establishment of woody perennials on hostile soils

Auteur : Azam, Md Gausul

Université de soutenance : University of Adelaide

Grade : Doctor of Philosophy (PhD) 2013

Présentation
Woody perennials exist in diverse conditions across arid and semi-arid regions and they bring enormous ecological, environmental and economic benefits – yet their establishment remains unreliable and expensive. A great deal of research has gone into cultural methods to improve establishment yet the edaphic factors have been largely ignored, and this is seen as a serious limitation. Without a good understanding of the interactions between plants and (often hostile) soil conditions, improved cultural methods can generate only limited progress. This study reviewed the literature associated with establishing woody perennial species on hostile soils in arid and semi-arid regions (Chapter 2, published in Plant and Soil as a review paper) and concluded that two of the most important soil properties limiting woody plant growth were high soil strength and low soil aeration. It also concluded that because some species grow well in hard soils while others grow well in waterlogged soils, there must be considerable genetic variation among woody perennials in the way they adapt to edaphic conditions. On this basis, the research reported in this thesis was conducted in four separate studies (each published or submitted for publication) to understand the variation in inherent root growth pressures that different woody species can exert on the soil

Mots clés : soil plant interactions woody perennials hostile soils

Résumé

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Page publiée le 1er novembre 2016, mise à jour le 12 juillet 2017