V.L.Polyakov Limited nutrient uptake by a single root |
Applied hydromechanics, Vol. 4 (76) ¹ 2, (2002) |
| An analytical solution is obtained to the problem of nutrient transport towards an isolated root in case of nutrient uptake according to the Michaelis-Menten kinetic. In particular, nutrient dynamics is considered at low concetration in soil solution. Comparison (made for linear kinetics) of the approximate solution presented with the Cushman exact solution points to their nearly complete coincidence. The reguliarities of nutrient transfer within the root influence zone and its accumulation inside the root are studied under various conditions corresponding to different levels of macro-and microelements concentration. An estimation of the significance of the change in root absorption capacity due to physiological reasons (age) is carried out for productive process. An approuch is founded to determine the uptake function for low mobile nutrient within the framework of biological continuous medium conception. |
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| TEXT LANGUAGE: Russian |