Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Cone yield evaluation of a grafted Pinus pinea L. trial.

Abstract

Grafted stone pine plantations for cone production could be an interesting alternative on low quality agriculture lands, as they display various advantages compared to the traditional forest harvesting: the possibility to use more productive genotypes, early bearing, easily harvesting, etc. Some grafted experiences with P. pinea have already been done, mainly focused on elucidating the relevance of environmental factors and in the selection of the best productive genotypes; however the productive information is still scanty. With a view to go into the species' agronomical potential knowledge in depth, in 2008 a grafted trial was planted at IRTA's Torre Marimon station (Caldes de Montbui, Spain). In 2010 an irrigation essay was started in order to study the effect of different water regimes on the strobili induction and productive responses. The first results show an early production onset on production, from barely 50 flowers/ha in 2008 to more than 3,500 in 2011. The first significant cone yield was registered in 2011, with 840 kg.ha-1. Concerning water supply, preliminary results show in the irrigated trees a lower fruit mortality on the second development year than in the control (7% against 20%, in 2010) and a higher floral induction (14 flowers/tree against 10, in 2011) . Further results in the coming years will allow to evaluate the productive potential of this kind of plantations.