Case studies tagged with cork

Assess inter-tree competition in permanent plots established in un-debarked, even-aged stands located in Portugal by i) comparing with the self-thinning line and ii) assessing when stand density affects cork production, iii) stand structure and iv) tree relative growth rate (RGR) pattern over tree size. Spacing coefficient (SC) values < 1.25 are assumed to affect cork production; therefore, detecting when stand density is approaching this value is important. Relative spacing (RS) is easier to evaluate, being important to find the RS value equivalent to a SC = 1.25.

This document presents the methodology used by the Extremadura Scientific and Technological Research Centre (CICYTEX) for assessing the quality of piled cork. Once the cork has been stripped from the trees, the planks are arranged in ‘piles’ prior to transportation to the factory. Assessing the cork in these piles is particularly useful in forests with difficult access, where direct assessment on the tree is not viable.

- Defining a simple and reliable methodology for the quantitative evaluation of stacked cork at cork parks that will serve as a mean of controlling the quantity weighed previously,

- Create a database at each cork park to determine the weight of a cubic meter of cork reproduction.

- Train forest technicians to generalize this method on all cork parks in Tunisia from the 2020 harvest.

An innovative solution to cork ‘off-flavour’ developed by the company DIAM is presented.

Estimate reproduction cork thickness as a criterion to examine the commercial value and to fit a non-linear model for predicting cork weight to guide the forest decision makers toward a reasonable harvest.

The objective is to guide forest decision-makers towards a reasonable cork harvest by:

• examining the thickness of cork as a criterion for estimating commercial value

• evaluating the intensity of the debarking operation on the tree

• establishing a non-linear model for predicting cork weight.

The aim is to monitor the population densities of the lepidopteran defoliator Lymantria dispar in Sardinian oak woodlands. This is done through  egg mass counts with the aim of predicting the areas at risk of defoliation and plan insecticide applications accordingly.

The work analyses the multifunctionality of cork oak forests and the benefits in terms of ecosystem services (CICES 2018, MAES 2017) in Sardinia. Supply, regulation and cultural services are assessed, also analysing identity, landscape, anthropological and historical aspects. The main factors that threaten the preservation of Cultural Ecosystem Sergices (CES) are taken into account. A set of actions and measures are proposed, consistent with identity and cultural values, for the recovery, conservation and enhancement of Natural and Cultural Capital of cork oak woods.

In the life cycle of cork, carbon dioxide (CO2) and methane (CH4) gases are released from biological material combustion or decomposition as well as from burning fossil fuels. The biogenic carbon emissions from forest-based products are usually not included because they are released into the atmosphere during the processing and end-of-life stages. The carbon footprint for the cork sector should be considered at different stages, from forest management activities, across the manufacturing processes and product distribution, to the product end-of-life.

The objective of the current work is the analysis of alternative sampling methods and intensities for estimating cork value before its extraction (price per unit of weight), considering the trade-off between sampling precision and costs. The dataset includes 30 sampling clusters for each of the 6 stands, where the measurement of the tree coordinates in each plot allowed for the simulation of several sampling methods and intensities, and the comparison of the percent errors and sampling costs.

This project studied in the Pyrénées-Orientales region for cork waste and the setting up of a short supply chain (building, garden centre, etc.) in order to create local jobs and enable owners of cork oak forests to earn some. The structuring of a value chain for cork waste will allow a return to production of the cork groves favourable to the prevention of fire risks and thus to the conservation of its heritage interest. The project has chosen to use techniques which do not require major investment in equipment or buildings. We focused on the results of a transformation into granulated...

The objective is to present GOSUBER, the supra-autonomous operational group of the European Innovation Partnership (EIP) in the area of Agricultural productivity and Sustainability, which aims to modernize debarking to make it more productive and improve occupational health and safety conditions. The group comprises 13 partners, including private companies, associations, research centres, universities and foundations.

The humidity of cork has always been a parameter considered in its commercialization, and is usually expressed as a percentage discount on the total cork quantity. Percentual moisture discounts are usually incorrectly applied, as they are applied directly to the quantity of cork. The same discount applied to cork with different moisture's content can translate into discounts in quantity of cork and not water.

This factsheet intents to inform the cork producers for the relevance of cork sampling for moisture content determination in order to establish the humidity discount in the...

In Tunisia, the cork oak is facing various difficulties namely: severe ecological conditions, very heterogeneous stands with variable density, and strong pressure on the forest. Reforestation has become an essential alternative to regenerate old cork oak forests and to support natural regeneration. Selecting adequate plant material with good genetic quality is important to ensure high adaptation to environmental hazards. In this context, the main objective is to explore and evaluate the genetic variability among different stands to select and conserve the best genetic material. 

To find a valorization of a co-product resulting from the treatment of the cork stoppers carried out by the company DIAM BOUCHAGE. The partnership between DIAM BOUCHAGE and OLEOS-HALLSTAR has made it possible to evaluate the cosmetic potential of this co-product in the form of a wax containing bioactive cork compounds. The industrial development led to the filing of a European application patent in 2014. The ingredient named DIAM Oléoactif® is a natural concentrate of anti-inflammatory compounds adapted to the care of sensitive and reactive skin.

This example show cases the possibility that some private companies, interested in processing cork, wood chips and wood, take-up forest management on behalf of private or public forest owners in a new private-private or private-public business model. This ensures the conservation of largely abandoned cork oak woodlands. The agreement foresees the possibility for the processing industry to ensure the mid and long-term supply of cork.

In recent decades, new cork oak plantation areas have been established in Portugal, not only in the traditional areas of distribution of the species but also in the northern parts. Historical records show that the species was formerly present here, and climatic thresholds suggest a possible occurrence. Cork oak site productivity, assessed through site index, was modelled in relation to soil and climate variables. The models were developed to estimate and map the site index value along the cork oak potential distribution area in Portugal.