AGROCHEMISTRY OF MICROFERTILIZERS IN RICE GROWING
Inclusion of microelements into the system of rice fertilizing is a mandatory component of science-intensive technologies. The need for this technique is determined by insufficient contents of mobile microelements in paddy soils of the Krasnodar region (mg/kg): boron, 0.78-1.88; cobalt, 0.76-1.26; manganese, 42.6-64.2; copper, 4.11-6.71; molybdenum, 0.17-0.34; zinc, 0.64-1.88. Pre-sowing enrichment of rice seeds with microelements increases the grain yield by 2.4-6.7 dt/ha (3.3-9.0 %). The largest increase was due to the application of 0.5 % boron, cobalt, copper, and molybdenum working solutions and 1.0 % zinc and manganese solutions. At low concentrations of microelements in the soil, it is necessary to apply microfertilizers before sowing or during the emergence stage at rates of 2 kg/ha for boron, cobalt, and molybdenum 3 kg/ha for cuprum, and 4 kg/ha for zinc and manganese, which provides an increase in yield by 2.9-6.3 dt/ha. Foliar application of microelements to plants is advantageous to be carried out with 0.1% aqueous solutions during the rice tillering stage. This method will increase the crop yield by 3.6-5.4 dt/ha.