Biofertilizer effect and plant density on alfalfa yield

In this work, under closed ground conditions, experiments were carried out on the dependence of the yield (weight of green mass) of alfalfa on plant density and on the amount of applied biofertilizer prepared according to a special technology based on waste of organic origin. The experiments were carried out under closed ground conditions in five variants, where the plant density had the following values: I variant S1 (average distance between two adjacent plants in one row) 10 cm; S2 (average distance between rows) 10 cm; II option S1 = 8.3 cm; S2 = 8.3 cm; III option S1 = 6.25 cm; S2 = 6.25 cm; IV option S1 = 5 cm; S2 = 5 cm; V option S1 = 4 cm; S2 = 4 cm. The location of plants and the characteristic distance in the control variant was taken identically as in the main variant. For alfalfa plants in the control variant, the value of the scalar standing density was determined, which corresponds to the maximum weight of the harvested green mass. Leaving the standing density, the same as the corresponding control options, as a result of the use of biofertilizer with the calculation of 1 kg per 1 m2 of area, the weight of green mass increased at the same time and the maximum standing density shifted to the right to the side of increasing placement density. This is due to the fact that an increase in the proportion of nutrients has reduced the degree of competition between neighbors. The increase in yield, that is, the increase in the weight of green mass with the use of biofertilizers, was approximately 36%.