Water deficit of leaves in healthy and weakened trees of birch plantings (<i>Betula pendula</i> Roth) under conditions of the Sterlitamak Industrial Centre
Evaluated the relative life status of birch plantings in the conditions of industrial pollution Sterlitamak industrial centre and in the area of conditional control, the study of root systems of woody plants. Presented materials in water deficit leaves of healthy and weakened trees of birch (Betula pendula Roth) in conditions of industrial pollution Sterlitamak industrial center in the period 2010 to 2016. Revealed that under conditions of industrial pollution Sterlitamak industrial center in the afternoon with increasing temperature and decreasing relative humidity moisture depletion increased in healthy and weakened trees of birch. The maximum water deficit during the day from 13-15 h. thus, the dry hot weather 2010, 2012, 2016, during the vegetation period was determined by the formation of significant water deficit from birch trees. Thus weakened trees in the conditions of industrial pollution in the night hours of the previous water consumption is not covered by the flow through the root system, so the next day in the morning started with some water deficit. As a result of researches it is established that in conditions of industrial pollution Sterlitamak industrial center with the deterioration of the vital state of the trees and with lower shares of the absorbing roots of the birch has been a significant increase in water deficit.