Water consumption of potatoes on sod-podzol soils of watersheds of the Moscow area
On the basis of the experimental data an empiric formula has been obtained for estimation of potatoes water consumption. There are given biological coefficients К <sub>б</sub> and coefficients K <sub>w</sub>,taking into accounts the moisture content of the root-inhabited soil layer. During the vegetation period of the 2013-2014 years there were carried out investigations on the base-reclamation station «Dubna» located in the Sergiev-Posadsky region of the Moscow area. On the basis of the received data there was made a water balance and received an equation of regression between water consumption and amount of average daily deficits of air humidity. This equation included biological coefficients obtained by both experimental way and calculations, the correlation coefficient of this data connection is equal to 0,825. The specified empiric formula is recommended to be used for calculation of potatoes water consumption for the conditions of irrigated sod-podzol soils of the Moscow area watersheds. The rated values of water consumption were obtained. The diagram was built of the connection of the actual potatoes water consumption for the vegetation period of 2013-2014 with the calculating one. The correlation coefficient of this connection is equal to 0.9667 that says about the close connection of the considered features. It is recommended for registration of the intensiveness decreasing of potatoes water consumption at the beginning and end of the period of vegetation to use the obtained biological coefficients in calculations. There is determined the influence of soil moisture decreasing on water consumption,there are received the coefficients taking into account the humidity of the soil root-inhabited layer.