The influence of changes in agrometeorological conditions on the interphase periods of Hordeum vulgare l. sensulat and its productivity in the center of the European part of Russia

Institute of Seed Production and Agricultural Technologies - branch of the Federal State Budgetary Scientific Institution "Federal Scientific Agroengineering Center VIM" (ISA-branch of GBNU FNATS VIM), Ryazan region, p. Podvyazye, Russia

^* Corresponding author: levakova.olga@bk.ru

Abstract

The studies were conducted in 2006-2022. in the Ryazan branch of the Federal State Budgetary Institution FNATS VIM. The object of research was released varieties and promising lines of Hordeum vulgare L. Sensulato. The purpose of the research is to establish the influence of changing weather conditions on the development phases and productivity of Hordeum vulgare L. Sensulato in the center of the European part of Russia. It was established that in the region there was an increase in the average daily air temperature during the growing season from 16.3 to 20.9°C (4.6°C/17 years, CV = 4.7%). The length of the growing season is closely related to the conditions of the hydrothermal regime of the year (r=+0.507...+0.508). The data obtained revealed a negative effect of the sum of air temperatures on the yield in the sprouting-tillering phase r = - 0.364, but the correlation with the amount of precipitation in this period was r = + 0.331, HTCM r = + 0.300. A closer relationship between the yield and the amount of precipitation (r=+0.308) and the hydrothermal coefficient (r=+0.337) is manifested in the interphase period of tillering and heading. The duration of the interphase period of germination-tillering has an average direct relationship with the HTC (r = +0.361) and a high inverse relationship with the sum of temperatures (r = -0.804), a similar picture is observed in the interphase period of earing-filling (r = +0.320 and r = -0.813 , respectively). The decisive weather factors that determine the size of the harvest and the duration of interphase periods of Hordeum vulgare L. Sensulato in the conditions of the Ryazan region are precipitation and thermal conditions from the second decade of May to the second decade of July.