Resin is a natural product that has multiple applications and is highly demanded in the chemical industry. As a non-timber forest product, exploitation of the abundant pine resin in Tunisian forests (50% of the forest area) can contribute to a bioeconomy and can generate additional income for forest populations.
The aim of this work was to evaluate the outcome of PPT content between ultrasound-assisted extraction and the conventional maceration extraction techniques.
This factsheet aims to present the mechanical harvesting option and the productivity monitorization done in umbrella pine stands harvested in both ways (manual and mechanically) in the last 17 years, located in Chamusca, Portugal. 5,000 m2 sample plot were installed in stand planted in the 1960s.
The objective was to evaluate the loss of moisture in pine cone during the storage after harvest, comparing the storage inside a warehouse or just under a shed. This information is intended to support the producer in deciding when to sell, at the beginning, during or at the end of the commercialization campaign, taking into account not only the market price / kg but also the weight loss of the pine cone due to the loss of moisture.
This factsheet aims to highlight the interannual variation of the pine cone dimensions and present some factors that explain it, in order to contribute for the future establishment of silvicultural measures than can lead to a decrease in that variation, by promoting the conditions for bigger pine cones or selecting more suitable Forest Reproduction Materials (FRM) .
There are several requirements and experiences for a successfull graft, that are reviewed in the following from a practical point of view.
In coastal regions like the Portuguese Alentejo or Catalonian Empordà, grafting is usually performed directly in the field on young plantations, by specialised teams of skilled forest workers. In-nursery grafting on container-raised rootstocks is an alternative, not discussed here, for harsher climate conditions where in situ grafting has a low success rate due to unpredictable spring weather (rain, wind, or late frost in some years, early heat waves in others).
Several handbooks and guides are available online for further consultation.
Threats and concerns in the management of stone pine in Portugal: insights from a survey among stakeholders
The forest area of stone pine, Pinus pinea, has increased significantly in Portugal in the last 30 years, following the same trend of other Mediterranean countries. At the same time, forest stakeholders report losses in cone production and yield and question on the best management practices to face a already changing climate.
During a Science to Practice event entitled "Stone pine and pine nuts: more knowledge for a better management" held in Lisbon in October 2019, we conducted a survey were we were able to assess the stakeholders' concerns with the pine nut value chain and identify research priorities.