It is established that on the average for years of researches at the time of full sprouts on experiment average indicators of density of crops at the level of 152,1 pieces/m2 that provided good optical density of crops of lentil plants are received. But at the time of harvesting plants, the average density of lentil crops was at the level of 128.5 pcs./m2, which generally provided good parameters of the structure of crops and prerequisites for the formation of a sufficient level of productivity.
It was investigated that in the flowering phase of lentil plants formed the maximum leaf area, which on average according to the experiment was at the level of 37.1 thousand m2/ha, but in the control variant only 32.0 thousand m2/ha. By inoculating the seeds with Ryzohumin and applying phosphate-mobilizing drugs and foliar feeding, we obtained the maximum parameters of the leaf surface of lentil plants in the experiment. Thus, in the variant of inoculation with Ryzohumin, application of Azohran B and treatment with Alga 600, lentil plants formed a leaf area of 40.3 thousand m2/ha. However, due to the use of the phosphate-mobilizing drug Polimiksobakteryn and Alga 600 on the background of seed inoculation with Ryzohumin, the leaf area was formed at the level of 39.9 thousand m2/ha, which in fact does not differ significantly from the previous version.
It was found that with the use of inoculation of seeds with Ryzohumin and the introduction of phosphate-mobilizing drugs and foliar feeding Alga 600 removal of nutrients was maximum in the experiment. With the combination of Ryzohumin, Polimiksobakteryn and Alga 600, 119.8 kg/ha of nitrogen, 40.6 kg/ha of phosphorus and 56.8 kg/ha of potassium were required for crop formation, while the application of Ryzohumin, Azohran B and Alga 600 required 110,5 kg/ha of nitrogen, 37.4 kg/ha of phosphorus and 52.4 kg/ha of potassium.
Inoculation of seeds with Ryzohumin contributed to an increase in the number of active tubers in the budding phase by 5.3 times, in the flowering phase by 4.5 times and in the phase of pouring beans 3.8 times compared with the control and growth of active symbiotic potential to 90.8-91 , 6% of the total symbiotic potential. But the best indicators of active symbiotic potential were on the options of inoculation of seeds with Ryzohumin, and the use of phosphate-mobilizing drugs Polimiksobakteryn and Azogran B in combination with foliar feeding Alga 600.
It was determined that in the flowering phase the maximum content of leghemoglobin in lentil tubers was with the use of Ryzohumin, application of phosphate-mobilizing drugs Polimiksobakteryn and Azohran B in combination with foliar feeding Alga 600 - 5.58 and 5.50 mg / g of raw mass of bulbs.
It was investigated that seed inoculation had a positive effect on plant height formation. The best results, on average over the years of research, on these indicators were found against the background of treated seeds Ryzohumin in combination with Biophosphorin - 49.9 cm and Azohran B - 49.4 cm with the use of foliar feeding. The largest number of stems was recorded on the same variants.
The formation of higher plants without increasing the number of nodes has a negative effect on their stability and causes already during flowering-formation of beans lodging crops. It was investigated that the combination of nitrogen-fixing and phosphate-mobilizing microorganisms and foliar application of Alga 600 had a positive effect on the formation of the trait by increasing the number of nodes compared to the control version from 23.0 pcs. up to 25.7-27.6 pcs.
It is established that the yield of lentils significantly depends on the application of the studied factors. Thus, on average over the years of research, the highest yields were in the variants of inoculation with the drug Ryzohumin and the use of phosphate-mobilizing – Polimiksobakteryn + growth regulator Alga 600 - 2.03 t / ha and inoculation with nitrogen-fixing microorganisms + Azohran B + Alga 600 - 1.87 t/ha ha. The lowest yield was determined in the variants without the use of our studied agricultural measures.
It was investigated that when inoculating seeds with Ryzohumin and applying Polimiksobakteryn or Azogran B in combination with foliar feeding Alga 600, the content of crude protein and total nitrogen was the highest in the experiment - 29.2 %.
The starch content in the seeds in the control variants was 53.8%, and in the variants of Ryzohumin - 0.6% higher. Also, a slight increase in starch content by 0.1-0.2% was observed against this background with foliar feeding Alga 600. But against the background without inoculation, the efficiency of foliar feeding Alga 600 was slightly better and the increase in starch content compared to non-fertilized variants was 0.4 -0.6 %.
