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Humboldt-Universität zu Berlin (2015)

Application and verification of the visual soil assessment method for pastoral grazing (according to SHEPHERD, 2009) in Kyrgyzstan under the given specific site conditions

Kirch, Peter

Titre : Application and verification of the visual soil assessment method for pastoral grazing (according to SHEPHERD, 2009) in Kyrgyzstan under the given specific site conditions

Auteur : Kirch, Peter

Université de soutenance : Humboldt-Universität zu Berlin

Grade : Master 2015

Résumé
This master thesis was written in the framework of the UPAGES project, which aims to facilitate the productive utilisation of pastures and their efficient protection in Kyrgyzstan. Within the project, the objective of the thesis was the provision of a suitable, reliable and defensible visual site assessment method under the given site conditions, which allows for an evaluation of the pasture condition. Furthermore this method was supposed to lead to a sensitisation of the land users concerning the topics "soil and pasture degradation" and to an awareness building concerning the need of a sustainable utilisation of the pasture areas. As potentially fitting method, the VSA method (developed in New Zealand) was chosen. A process of application and verification in the research area was conducted to answer the main research question : "Is the VSA method for pastoral grazing (acc. to SHEPHERD, 2009) fully applicable under the given specific site conditions in Kyrgyzstan ?" The assessment process consisted of the VSA method application and of the application of two additional visual field methods. The latter were conducted to test the applicability of possible alternative visual indicator sets. Standard field and laboratory-based methods for the assessment of soil and vegetation data were also applied. The VSA method was found to be moderately applicable under the specific site conditions. Furthermore the low correlation between the indicator ratings and the measured data sets led to the conclusion that the VSA method in its given form can not be classified as suitable. In contrast, the indicator sets of the alternative visual field assessment methods were better applicable. The method acc. to Etzold et al. (2010) showed the best applicability and suitability in the research area. Through slight adaptations to the specific conditions a full applicability of this method in the research area could be achieved.

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Page publiée le 4 décembre 2017