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首页> 外文期刊>Plant and Soil >Complementary water uptake depth of Quercus petraea and Pinus sylvestris in mixed stands during an extreme drought
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Complementary water uptake depth of Quercus petraea and Pinus sylvestris in mixed stands during an extreme drought

机译：在极端干旱期间，混合型佩斯科宠物的互补水深和松鸡Sylvestris

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AimsThe growing demand from forest managers is to identify silvicultural practices to overcome projected water scarcity during the next decades. One solution is to mix tree species in the same stand, thereby increasing resource partitioning and minimizing competition for limited soil water. This study investigates the mixture approach for Quercus petraea (Matt.) Liebl. and Pinus sylvestris L. during an extreme summer drought event.MethodsDuring the summer drought event in 2016, we analyzed the isotopic signatures of large- and small-tree xylem and soil water throughout the soil profile to assess the depth of water uptake for both tree species. We also measured predawn leaf water potentials (PLWP) to assess water availability for individual tree species.ResultsWhen grown in pure stands, both species primarily utilized soil water near the surface. In contrast, partial niche complementarity for limited water resources between the two species in mixed stands resulted in less water constraint (i.e., less negative PLWP) for oak trees compared to pure stands, especially for small trees.ConclusionsResults from this study show that contrasting water use strategies can change water availability for trees and could help some species, though not all, to cope with the water scarcity predicted in a changing climate.
机译：森林经理的需求日益增长的是识别未来几十年来克服预计水资源稀缺的造林实践。一种解决方案是在同一支架中混合树种，从而增加资源分区和最小化土壤水的竞争。本研究调查了槲皮素（MATT。）LIEBL的混合方法。在一个极端夏季干旱期间，在极端夏季干旱期间。在2016年的夏季干旱活动中，我们在整个土壤剖面中分析了大型和小树木质和土壤水的同位素签名，以评估两棵树的水深物种。我们还测量了预先的叶片水潜力（PLWP），以评估单个树种的水可用性。在纯展台中生长的培养韦伦，这两个物种主要在地表附近使用土壤水。相比之下，与纯粹的展台相比，混合架中两种物种之间的有限水资源的部分利基互补性导致橡树树的水限制（即，较少的负PLWP），特别是对于小树木。来自这项研究的ConclusionsResults，表明对比水使用策略可以改变树木的水可用性，并且可以帮助一些物种，虽然并非全部，以应对气候变化所预测的水资源稀缺性。

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