The article presents the study on the influence of the row spacing and the seeding rate on the yield of green mass of corn in the conditions of Priamurye. The research was carried out in 2020–2021 on the experimental field of the Far Eastern State Agrarian University. The soil was meadow-chernozem. The effect of five gradations of row spacing of 30, 45, 60, 70 (the control) and 90 cm and four grain seeding rates of 70, 80 (the control), 90 and 100 thousand germinating grains per 1 hectare were studied. Four variants of the seeding rate gradations corresponded to each variant of the row spacing width. The registered area of the plot was 22.5 m2. The repetition of the variants was threefold. The highest corn plants were in variants with a row spacing of 70 cm and seed seeding rates of 70 and 80 thousand pcs./ha. In the experiment, a regular increase in the height of plants from ordinary row spacing of 30 cm to wide-row spacing of 70 cm was traced; the subsequent increase in the width of the row spacing reduced the height of plants. The largest mass of plants was formed in corn in the variant of the row spacing of 70 cm and the seeding rate of 70 thousand pcs./ha. The highest yield of green mass was observed in the variant of row spacing of 45 cm and the seeding rate of 90 thousand pcs./ha. With an increase in the seeding rate from 70 thousand pcs./ha to 100 thousand. pcs./ha naturally increases the yield of green mass in crops with row spacing from 30, 60 and 90 cm. In crops with row spacing of 45 and 70 cm, the yield of green mass increases with an increase in the seeding rate from 70 to 90 thousand pcs./ha, a further increase in the seeding rate to 100 thousand pcs./ha naturally reduces it.

Akhalbedashvili David V.

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