Comparison of tree water use characteristics in reforestation and agroforestry stands across the tropics

摘要: In the tropics, reforestations and agroforestry become increasingly important may help mitigate climate change. However, high water use by trees deplete resources for associated crops or other purposes. Choice of tree species might reduce rates to acceptable levels, but available information on species-specific characteristics is scarce. We addressed following questions: 1) do differ in xylem sap flux response fluctuating environmental conditions, 2) are there differences quantities used, specifically 3) universal rules relating size apply? This chapter combines data gathered Indonesia, Panama Philippines. These studies applied same methods were conducted recently established stands (5–12 years old when studied) characterised small diameter relatively simple stand structure. analyse from more than 100 belonging 17 using a model. Model application suggested parameters such as maximal velocity responses radiation vapour pressure deficit. With respect quantity used per tree, we observed strong correlation between use, which confirms earlier publications. e.g. Philippines where explained 65% variation, some clearly followed distinct trajectories. For given diameter, up twofold among observed. Our findings thus support idea that selection can be control future within Teja Tscharntke, Christoph Leuschner, Edzo Veldkamp, Heiko Faust, Edi Guhardja, Arifuddin Bidin (editors): Tropical rainforests agroforests under global change: Ecological socio-economic valuations. Springer Berlin 2010, pp systems. will especially relevant areas limited already scenarios predict decreasing precipitation.