Yield of different onion varieties depending on the level of mineral nutrition and growth regulators in the conditions of the Southern Forest-steppe of the Republic of Bashkortostan

Abstract

The purpose of research was to determine the peculiarities of the action of Epin-extra, NPK+Epin-extra, Heteroauxin, NPK+Heteroauxin on the yield and chemical composition of onions in the conditions of the southern forest-steppe zone of the Republic of Bashkortostan. The novelty of the research comprises because for the first time in the conditions of the southern forest-steppe zone of the Republic of Bashkortostan the experiments with the participation of a new variety of Bashkirian selection - Iglinsky 2. Onion yield of the studied varieties Strigunovsky local, Red Baron and Iglinsky 2 in variants with different nutrition backgrounds was higher than in the control by 0.64-9.34 tonnes/ha. The amount of dry matter in varieties Strigunovsky local and Red Baron was higher than normal in all nutrition backgrounds. The maximum yield of onion was formed in Iglinsky 2 variety on the background of Heteroauxin application - 60.5 tonnes/ha or 116.57% in comparison with the control. The presence of weak negative correlation between yield and average daily temperature regime (r = -0.276) was established. A positive correlation between yield, precipitation sum (r = 0.481) and Heteroauxin (r = 0.470) was found. We can use the research results in cultivation of onion in the Republic of Bashkortostan and the Russian Federation, is of interest for foreign researchers-breeders.