INFLUENCE OF CAPILLARY-SORPTIVE AND OSMOTIC MOISTURE PRESSURE IN CHERNOZEM ON THE GROWTH AND GUTTATION OF BARLEY

In an experiment with a single independent variable, a separate influe nce of capillary-sorptive (P-cs) and osmotic moisture pressure (P-o) o n growth and guttation of barley was studied with the aim of examining the availability of soil moisture for plants in a wide range of salin ization (0.2-50 g/l NaCl and 0.2-66 g/l Na2SO4) and moistening (P-cs 0 ...-24 atm). The study was carried out on samples of chernozem moisten ed with salt solutions (NaCl and Na2SO4) to the values of field water capacity. It is shown that the dependence between the relative growth and guttation of barley and the osmotic pressure is close to the linea r one: the equations derived are in agreement with modern concepts of water movement in the soil-plant system.