Application of Basic and Modified Methods for Assessing the Land-Degradation Neutrality in the Context of Studying the Relationship between Degradation and Agricultural ProductionстатьяПеревод
Аннотация:This article is devoted to the theory and practice of applying the concept of land-degradation neutrality (LDN) to the conditions of the Belgorod oblast of the Russian Federation. Its basic version is considered, which is based on the analysis of three subindicators, where the assessment of land-degradation trends in the surveyed area involves the analysis of changes in the main indicator, which is the percentage of degraded land of the total area of the territory, and three subindicators of SDG 15.3.1, these being the changes in land productivity, the changes in land cover, and the dynamics of soil organic carbon reserves. As an adjustment to the basic approach of LDN, it is proposed to supplement it with the regional data on soil characteristics. The content of humus and nutrients, as well as pH, are soil properties that can be recommended as necessary for consideration in the evaluation model. These characteristics are largely related to soil fertility, on the one hand, and are most at risk of degradation changes during human exploitation of soils, on the otherhand. Modification of the LDN methodology makes it possible not only to clarify the central (umbrella) indicator, but also to identify the relationship between the latter and the indicators of agricultural production, in particular, gross crop yields. Data analysis using the modified LDN method has shown that 64.8% of the region is degraded (which is almost two times higher than the values obtained by the basic LDN method), which leads to a significant loss of crop yield. The article proposes an algorithm for assessing the relationship between land degradation and gross crop yields based on correlation and regression analysis (spatial models).
