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How much water is used by a black locust (Robinia pseudoacacia L.) short-rotation plantation on degraded soil?

Mantovani, Dario and Veste, Maik and Freese, Dirk (2011) How much water is used by a black locust (Robinia pseudoacacia L.) short-rotation plantation on degraded soil? In: Jahrestagung der DBG 2011: Böden verstehen - Böden nutzen - Böden fit machen, 03.-09.09.2011, Berlin.

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Black locust is a tree species autochthonous from North America, were its distribution range from humid to sub-humid climate. As an early successional and nitrogen-fixing species, black locust grows rapidly as a pioneer tree species under a wide range of site condition. Black locust short-rotation plantations for bioenergy production is raising interest, particularly for those areas were conventional crops systems are economically not profitable. In southern Brandenburg black locust have been successfully used for land reclamation and biomass production in recultivated open-cast lignite mining areas, where nutrient and water resources are limited. An open key question is the water use of the trees under drought conditions which are quite common in these areas. For the determination of transpiration at whole plant level we used a modified wick lysimeter system, which allows us to study plant growth under controlled water regime. Water amount is controlled by the actual evapotranspiration and water demand of the plants and supplied by an automatic drip irrigation system. Transpiration is calculated from the experimental water balance in daily intervals. Photosynthesis is the essential process for biomass productivity including CO2 uptake and water loss controlled by the stomata on the leaf level. Therefore, the ecophysiological response of the plants to drought stress is investigated by using a portable gas exchange system, which allows the measurements of transpiration under various temperature and air humidity regimes. Water use at whole plant level has been linked to their ecophysiological performance.

Item Type: Conference or Workshop Item (Contribution to "Reports of the DBG")
Uncontrolled Keywords: Bioenergy production, short-rotation plantation, water use, ecophysiological response, yield-transpiration relation
Divisions: Kommissionen > Kommission IV: Bodenfruchtbarkeit und Pflanzenernährung
Depositing User: Dario Mantovani
Date Deposited: 31 Oct 2011 17:09
Last Modified: 13 Dec 2015 16:26
URI: https://eprints.dbges.de/id/eprint/740

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