Pedofunctional effects with negative impact on the health of arable chernozem soils induced by agrogenesis and climate change
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632.11:631.445.4 (1)
Boli ale plantelor. Dăunători și organisme vătămătoare pentru plante. Protejarea plantelor (985)
Știința solului. Pedologie. Cercetări pedologice (721)
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JIGĂU, Gheorghe, STADNIC, Angela. Pedofunctional effects with negative impact on the health of arable chernozem soils induced by agrogenesis and climate change. In: Natural sciences in the dialogue of generations, 14-15 septembrie 2023, Chişinău. Chişinău: Centrul Editorial-Poligrafic al USM, 2023, p. 163. ISBN 978-9975-3430-9-1.
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Natural sciences in the dialogue of generations 2023
Conferința "Natural sciences in the dialogue of generations"
Chişinău, Moldova, 14-15 septembrie 2023

Pedofunctional effects with negative impact on the health of arable chernozem soils induced by agrogenesis and climate change

CZU: 632.11:631.445.4

Pag. 163-163

Jigău Gheorghe, Stadnic Angela
 
Moldova State University
 
 
Disponibil în IBN: 19 octombrie 2023


Rezumat

The combined action of agrogenesis and climate change led to the establishment of an evolutionary phase within the genetic-evolutionary chain factors←pedogenetic regimes← pedogenetic processes←soil (soil health) in which the soils do not correspond to the current climatic conditions. The specified phenomenon does not fit into the basic principles of the theory of pedogenesis and is caused by the particularities of the soil in its capacity as a complex bioroutine system constituted on the pedological scale of time manifested in its stability in relations with environmental factors. The changes induced in its structural-functional organization by the agrogenetic degradative processes led to the reduction of the adaptability of arable chernozems to the newly created climatic conditions, especially to more severe climate phenomena, especially to drought. According to the landscape-genetic concept of the genesis and evolution of chernozioms, drought and periodic water deficit are features "memorized in the genetic code of chernozioms". Degradative processes induced by agrogenesis have led to the disruption of pedofunctional balances between the components of the bioroutine system established during the last 4-6 thousand years and the reduction of the capacity to adapt to the conditions of the current climate framework. In this sense, we mention that the disturbance of the ecological balances between the components of the bioroutine system is inherent in agrogenesis and implies the unidirectional degradation of the soil in its biotope quality and soil fertility. Climate changes act interspersed with agrogenesis and lead to the intensification of degradation processes. The main cause of the reduction in the ability of arable chernozioms to adapt to climate conditions with a higher degree of continentality is the degradation of three basic functions of chernozioms: a) production; b) environmental-formative and c) reproductive. The specified functions are basic attributes of soil health. Through this prism of ideas, soil health is an integrative index of all soil functions, the destination of which is to ensure an optimal external and internal environment for the functionality of the soil ecosystem and the continuous reproduction of the pedogenetic process responsible for the reproduction of soil health factors. The disturbance of the quantitative and qualitative balances between them leads to the disturbance of the functionality of the bioroutine system, its stability and health. The degradation of the production function is determined by the change in the direction and intensity of the humus formation and accumulation process responsible for the elementary functions: hydrophysical, nutritional, physiological, biologically stimulating, metabolic. The degradation of the environmental-forming function is caused by the reduction of the biogenic modeling capacity of the abiotic substrate and is manifested in the disruption of the functionality of the pedofunctional system [bioenergetic system↔aggregate system] responsible for the functionality of the biotic component. The degradation of these functions reduces the self-reproduction capacity of the bioroutine system and its health.

Cuvinte-cheie
arable chernozems, pedogenetic regimes, pedofunctional regimes, pedogenetic processes, soil health