1.2 Coordonnées des personnes-ressources et des institutions impliquées dans l'évaluation et la documentation de la Technologie

Nom du projet qui a facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Preventing and Remediating degradation of soils in Europe through Land Care (EU-RECARE )

Nom du ou des institutions qui ont facilité la documentation/ l'évaluation de la Technologie (si pertinent)

Soil Conservation Service of Iceland (Soil Conservation Service of Iceland) - Islande

1.3 Conditions relatives à l'utilisation par WOCAT des données documentées

Le compilateur et la(les) personne(s) ressource(s) acceptent les conditions relatives à l'utilisation par WOCAT des données documentées:

Oui

2.1 Courte description de la Technologie

Définition de la Technologie:

Applying organic residuals on denuded ares

2.2 Description détaillée de la Technologie

Description:

The concerning rangelands are severely degraded and parts of them have even lost their topsoil layer entirely. Nevertheless, in many cases some remnant vegetation patches are still in place and can serve as seed banks during the restoration process. In order to stabilize the surface (i.e. to reduce the effects of freeze-thaw processes), provide nutrients to the system, increase water availability and facilitate the distribution of native species within the degraded areas, tractors are used to spread manure or hay over the denuded areas. All implementations are based on the methods and tools used in ecological restoration, aiming at re-activating environmental and ecological processes and increasing the resilience of the ecosystems undergoing restoration. Denuded patches, preferably close to the remaining vegetation "islands" are covered with organic matter in order to stabilize the surface, facilitate seed production and seed dispersal and provide safe sites for seed germination.

Purpose of the Technology: The purpose with the technology is to halt further land degradation and facilitate natural succession within the area undergoing restoration. In the long-term, it should substantially reduce wind and water erosion. It should also lead to increased biodiversity, enhanced water availability and accelerated carbon sequestration (in soil and vegetation). The overall restoration task is to increase the resilience of the ecosystems against natural hazards; such as volcanic activities.

Establishment / maintenance activities and inputs: In the year after the areas are treated, they are commonly treated with a low portion of inorganic fertilizer to add easily dissolvable nutrients to the seeds and seedling that have already germinated within the area. The fertilizing treatment is repeated approx biannually for 4-8 years on the average.

Natural / human environment: In the long-term, the technology is expected to substantially increase biomass production, re-build soil qualities, accelerate carbon sequestration and secure water availability within the rangeland and the adjacent ecosystems. The areas still grazed are expected to be more suitable for livestock grazing and the protected areas are expected to be of more recreational and aesthetic value. Increased vegetation cover will reduce and even halt the sand drift that still creates challenges for inhabitants in adjacent villages, on farmsteads and within the summerhouse clusters, scattered around the area. As the degraded rangeland is in the vicinity of an active volcano (Mt Hekla) the technology is also expected to increase ecosystem resilience against natural hazards like ash and pumice drift and reduce potential offsite damages caused by these materials.

2.3 Photos de la Technologie

2.5 Pays/ région/ lieux où la Technologie a été appliquée et qui sont couverts par cette évaluation

2.6 Date de mise en œuvre de la Technologie

Si l'année précise est inconnue, indiquez la date approximative: :

• il y a plus de 50 ans (technologie traditionnelle)

2.7 Introduction de la Technologie

Spécifiez comment la Technologie a été introduite: :

• dans le cadre d'un système traditionnel (> 50 ans)

3.1 Principal(aux) objectif(s) de la Technologie

• réduire, prévenir, restaurer les terres dégradées

3.2 Type(s) actuel(s) d'utilisation des terres, là où la Technologie est appliquée

Commentaires:

Major land use problems (compiler’s opinion): Vast parts of the area are heavily degraded due to unsustainable land use through the centuries in combination to harsh climate and frequent volcanic eruptions. The major land use problem are related to the fact that the concerned ecosystems collapsed long time ago and despite all restoration efforts implemented within the area for over 100 years, the systems are still highly dysfunctional. Their carrying capacity is limited and even light livestock grazing can keep further vegetation succession down. Passive restoration might take place where the livestock grazing has been excluded but in most cases some technologies are needed to "kickstart" the ecosystem and break their negative resilience against changes.

Major land use problems (land users’ perception): They are fully aware that the ecosystems are in a poor condition and restoration is needed in order to push improvements forward. They acknowledge that grazing of collapsed ecosystems can maintain the dysfunctional of the systems and hinder ecological improvements. Nevertheless, in many cases they believe the harsh climate and volcanic activities are the main contributors to land degradation - that livestock grazing and the grazing carrying capacity of the rangeland are not fundamental issues in this context.

Future (final) land use (after implementation of SLM Technology): Grazing land: Ge: Extensive grazing land

Si l'utilisation des terres a changé en raison de la mise en œuvre de la Technologie, indiquez l'utilisation des terres avant la mise en œuvre de la Technologie:

Other: Oo: Other: wastelands, deserts, glaciers, swamps, recreation areas, etc

3.4 Groupe de GDT auquel appartient la Technologie

• Amélioration de la couverture végétale/ du sol

3.5 Diffusion de la Technologie

Commentaires:

Total area covered by the SLM Technology is 900 m2.

3.6 Mesures de GDT constituant la Technologie

Commentaires:

Main measures: agronomic measures

3.7 Principaux types de dégradation des terres traités par la Technologie

Commentaires:

Main type of degradation addressed: Wt: loss of topsoil / surface erosion, Et: loss of topsoil, Eo: offsite degradation effects, Bc: reduction of vegetation cover

Secondary types of degradation addressed: Wo: offsite degradation effects, Bq: quantity / biomass decline, Bs: quality and species composition /diversity decline, Hs: change in quantity of surface water, Hg: change in groundwater / aquifer level

3.8 Prévention, réduction de la dégradation ou réhabilitation des terres dégradées

Commentaires:

Main goals: prevention of land degradation, mitigation / reduction of land degradation, rehabilitation / reclamation of denuded land

4.1 Dessin technique de la Technologie

4.2 Spécification/ explications techniques du dessin technique

An example of how old hay can effectively be distributed on denuded areas with the right equipment

Technical knowledge required for field staff / advisors: low

Technical knowledge required for land users: low

4.3 Informations générales sur le calcul des intrants et des coûts

autre/ monnaie nationale (précisez):

ISK

Indiquer le taux de change du dollars en monnaie locale (si pertinent): 1 USD= :

112,0

4.4 Activités de mise en place/ d'établissement

	Activité	Type de mesures	Calendrier
1.	Spreading organic residuals	Agronomique

4.5 Coûts et intrants nécessaires à la mise en place

	Spécifiez les intrants	Unité	Quantité	Coûts par unité	Coût total par intrant	% des coût supporté par les exploitants des terres
Equipements	Machine use	ha	1,0	180,0	180,0	100,0
Engrais et biocides	Compost/manure	ha	1,0	42,0	42,0
Coût total de mise en place de la Technologie					222,0

Commentaires:

Duration of establishment phase: 1 month(s)
Life span of the organic residuals: 1 year
Number of parties sharing: 232

4.8 Facteurs les plus importants affectant les coûts

Décrivez les facteurs les plus importants affectant les coûts :

The most determinate factors affecting the cost are: 1) the machinery needed and 2) the distance of the eroded areas from the farmsteads

5.1 Climat