Open AccessZoning of agroecological potential areas for agricultural land assessment of the Saratov region
Author(s) -
Vladimir A. Tarbaev,
Vyacheslav Mikhailovich Yanyuk,
Alexey Alekseevich Dorogobed,
Yulia Ivanovna Shadau,
Tatyana Vladimirovna Kuznichenkova
Publication year - 2020
Publication title -
agrarnyj naučnyj žurnal
Language(s) - English
Resource type - Journals
eISSN - 2587-9944
pISSN - 2313-8432
DOI - 10.28983/asj.y2020i4pp37-43
Subject(s) - zoning , environmental science , agroecology , agriculture , productivity , land use , yield (engineering) , agricultural land , hydrology (agriculture) , physical geography , water resource management , geography , ecology , materials science , geotechnical engineering , engineering , archaeology , biology , political science , metallurgy , law , economics , macroeconomics
The standard yield model recommended for land assessment and certification of land according to the degree of suitability for agricultural use is based on the assessment of agro-ecological potential (AP) as characteristics of the territory 's water and thermal resources. The quality check of the model according to the data of the class testing areas for the period 2007-2018 showed an overestimation of the standard grain yield for the conditions of the Saratov region by 1.2-1.5 times. The error is due to the use of the most available agro climatic parameters in the model, which establish their connection with productivity at the interregional level, but do not meet the conditions of adequate differentiation of conditions of moisture supply of crops at the regional level.
Correction of the AP model, when using the parameters of water and thermal resources provision by the coefficients of annual moistening and the sum of biologically active temperatures, is achieved by reducing the AP level by 1.2 times and fixing the standard value of the climate continental index - 187. A new version of estimated zoning is proposed based on the corrected model of AP, at which the number of agro climatic subzones is reduced from 9 to 6. The adequacy of the assessment of land productivity is ensured by the use of AP parameters that are individual for municipal areas rather than medium-sized ones.