Abstract
Understanding water relations is necessary to assess forest vigor, since numerous plant processes are influenced by the water status of the soil and the plant, e.g., growth, nutrient uptake, the production and release of growth substances and leaf gas exchange (Bradford and Hsiao 1982; Schulze 1986). However, the availability of water for sustaining these processes is not only dependent on control mechanisms at the individual plant level, but is also determined by the canopy structure and boundary conditions at the stand level (Jarvis and MacNaughton 1985; Jarvis 1987). The balance between rainfall and evapotranspiration at the stand level determines to a large extent the transport of substances into and out of the ecosystem. Water percolating through the soil profile carries nutrients which may be leached below the root zone into the groundwater (Ulrich 1987). The physical properties of the soil will in turn affect the availability of water and nutrients for plant uptake.
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Schulze, ED., Hantschel, R., Werk, K.S., Horn, R. (1989). Water Relations of Two Norway Spruce Stands at Different Stages of Decline. In: Schulze, ED., Lange, O.L., Oren, R. (eds) Forest Decline and Air Pollution. Ecological Studies, vol 77. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61332-6_15
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DOI: https://doi.org/10.1007/978-3-642-61332-6_15
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