Model of the Sequential Effect of Agrocenosis Factors (Amendment Rate -> Soil pH -> Soil Al) on Crop Yield

摘要

The model of a sequential effect of agrocenosis factors was considered, which included the following factors: soil pH amendment rate, exchangeable Al-pH, and crop yield exchangeable Al. It was shown that the relationships for each component could be described by logistic functions, for which extension and steepness of curves are characteristic parameters dependent on the physicochemical properties of soil and the physiological functions of plants. The extension/steepness ratio was relatively constant for each component of the reclamation model. The impact of amendment rate or soil pH on crop yield was indirect and realized through the content of exchangeable Al in the soil, its effect on plants, and the resistance of plants to the impact of exchangeable Al.