Effect of seeding rates on grain yield of a female form in winter rye hybridization plots

Abstract

Purpose. To establish the regularities of the plant stand formation in the female form of modern hybrids depending on seeding rates in winter rye hybridization plots; to prove that an increase in the seeding rate does not lead to an increase in the seed yield and entails an increase in costs for the production of hybrid winter rye seeds; to calculate the economic losses resulted from increased seeding rates due to the purchase of seeds.
 Material and Methods. The study was carried out in the experimental field of the Plant Production Institute named after V.Ya. Yuriev of NAAS in 2016-2018. In the study, the female form of modern commercial winter rye hybrids (Yurivets, Yupiter) was used; it was sown by solid or wide-row planting, with a seeding rate of 750,000 – 4,000,000 germinable seeds per hectare.
 Results and Discussion. The plant density affects the yield and primarily depends on seeding rates.
 We determined the level of realization of the plant density by plants of the female form of the winter rye hybrids depending on seeding rates.