Assessment of the reserves of organic matter in the world’s soil: methodology and results

Puzachenko, Y.G.; Kozlov, D.N.; Siunova, E.V.; Sankovskii, A.G.

Авторы: Puzachenko Yu G., Kozlov D.N., Siunova E.V., Sankovskii A.G.
Журнал: Eurasian Soil Science
Том: 39
Номер: 12
Год издания: 2006
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1284
Последняя страница: 1296
DOI: 10.1134/S1064229306120027
Аннотация: An interpolation method was used to calculate the reserves of soil organic matter on the basis of data in the FAO soil database, the database developed by V.S. Stolbovoi with certain additions made by the authors for the territory of Russia, the climatic variables (the mean air temperature, the partial pressure of water vapor, precipitation, the relationship between the mean air temperature and precipitation, the number of days with subzero temperatures, and the number of days with precipitation for every month), the normalized difference vegetation index (NDVI) values for every month and for the whole year, the height above sea level, the macroslope steepness, and the presence of permafrost. The method of step-by-step discriminant analysis was applied for the calculations, and the results obtained were displayed on a grid map of the world for cells of 1°. The interpolation errors were also calculated. The global pool of soil organic carbon was estimated at 1.35 × 1012 t (from 1.31 × 1012 to 1.38 × 1012 t with a probability level of 0.95). It was demonstrated that the reserves of soil organic carbon on the global level could be described as a function of the heat and moisture supplies, the relationship between them, and the biological productivity. The global changes in the climatic variables and the net primary production describe about 40% of the variability of the soil organic matter reserves as assessed on the basis of the factual data included in our analysis.
Добавил в систему: Козлов Даниил Николаевич

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