Abstract
Nature-based solutions can significantly contribute to restoration projects in areas
affected by desertification processes, where they are necessary for reversing land
degradation. Currently, one innovative solution is The Cocoon™, which has been
designed as a new ecotechnology for improving seedling establishment. The Cocoon
consists of a doughnut-shaped container made of recycled cardboard that provides
water and shelter at least during the first year of a seedling, which is the most critical
for plant establishment. To determine the effectiveness of this ecotechnology under
different conditions, the Cocoon was tested on a variety of soils, climates, vegetation,
and land uses. Six planting trials were performed in Spain and Greece, which covered
a range from humid to arid climates. With the objective of studying its functionality,
the survival of the seedlings, their vigor, and growth were monitored for 2 years.
Compared with conventional planting systems, the Cocoon has effectively increased
seedling survival, especially under dry growing conditions (low rainfall, soils with low
water holding capacity). The Cocoon also allowed for higher growth of some species
(olive trees, holm oaks, and Aleppo pines). Moreover, a positive correlation between
the rainfall on the site and the biodegradation degree of the Cocoon device was
observed. Overall, the Cocoon becomes more efficient in arid climates or adverse
growing conditions.
Keywords: climate change adaptation, Cocoon, drylands, irrigation, planting
