Un article vient de para\u00eetre dans la revue \u00ab\u00a0Plant science\u00a0\u00bb sur la compl\u00e9mentarit\u00e9 du Ch\u00eane sessile et du Pin sylvestre poussant en peuplement m\u00e9lang\u00e9 concernant les profondeurs de pr\u00e9l\u00e8vement d’eau de ces deux esp\u00e8ces pendant une forte s\u00e9cheresse. Les donn\u00e9es de ce travail ont \u00e9t\u00e9 acquises en 2016 sur les placettes OPTMix. Pour d\u00e9terminer les profondeurs de pr\u00e9l\u00e8vement les signatures isotopiques (oxyg\u00e8ne) du bois et du sol pendant la p\u00e9riode du stress hydrique ont \u00e9t\u00e9 compar\u00e9es. Les r\u00e9sultats montrent que pendant une forte s\u00e9cheresse le Ch\u00eane sessile et le Pin sylvestre poussant en peuplement m\u00e9lang\u00e9 ont des profondeurs de pr\u00e9l\u00e8vement d’eau diff\u00e9rentes.<\/p>\n\n\n\n
Bello, J., N. J. Hasselquist, P. Vallet, A. Kahmen, T. Perot and N. Korboulewsky (2019). \u00ab\u00a0Complementary water uptake depth of Quercus petraea and Pinus sylvestris in mixed stands during an extreme drought.\u00a0\u00bb Plant and Soil. doi: 10.1007\/s11104-019-03951-z<\/a><\/p>\n\n\n\n Abstract<\/p>\n\n\n\n Aims<\/strong>: The 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.<\/p>\n\n\n\n Methods<\/strong>: During 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.<\/p>\n\n\n\n Results<\/strong>: When grown in pure stands, both species primarily utilized soil water near the surface. In contrast, partial niche complementarity for limited water resources<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" Un article vient de para\u00eetre dans la revue \u00ab\u00a0Plant science\u00a0\u00bb sur la compl\u00e9mentarit\u00e9 du Ch\u00eane sessile et du Pin sylvestre poussant en peuplement m\u00e9lang\u00e9 concernant les profondeurs de pr\u00e9l\u00e8vement d’eau de ces deux esp\u00e8ces pendant une forte s\u00e9cheresse. Les donn\u00e9es de ce travail ont \u00e9t\u00e9 acquises en 2016 sur les placettes OPTMix. Pour d\u00e9terminer les … <\/p>\n