LENTIL PRODUCTIVITY DEPENDING ON SEED INOCULATION AND MINERAL NUTRITION IN THE CONDITIONS OF THE NORTH-EASTERN FOREST STEPPE OF UKRAINE

Abstract

The article presents the study results of the effect of bacterial preparations Rhizohumin (based on nitrogen-fixing bacteria Rhizobium leguminosarum strain 31) and Polymyxobacterin (based on phosphorus-mobilizing bacteria Bacillus polymyxa KB) on different backgrounds of mineral nutrition (P60K60, N60P60K60) when growing lentil in the north-eastern forest-steppe of Ukraine. The research was conducted on the basis of the training and research production center of Sumy National Agrarian University according to generally accepted methods during 2016-2018.Lentil is one of the most valuable legumes. In terms of nutrition and nutritional qualities, this culture has no equal. The development of new and improvement of existing models of lentil cultivation technology, in particular the pre-sowing inoculation of seeds with bacterial preparations to increase productivity is an important topical issue that requires appropriate scientific justification. Inoculation of lentil seeds with bacterial preparations causes additional involvement in the nitrogen cycle of the atmosphere.This event is one of the most important in modern technologies for growing legumes as an element of greening and energy conservation. Due to the fixation of nitrogen by nodule bacteria of the genus Rhizobium, lentils play an important role in increasing soil fertility. Therefore, seed inoculation is an effective and necessary measure that affects plant development throughout ontogenesis.The study of the peculiarities of growth and development of lentils during ontogenesis makes it possible to reveal the important features of the formation process of high productivity, to determine the scientific basis for the creation of highly productive agrocenoses of legumes.The level of yield of legumes is determined by such elements of productivity as: the number of beans per plant, the weight of grains per plant and the weight of 1000 grains. In this regard, there is a need to take into account these indicators, which, by substantiating the cultivation techniques will help to increase yields.It is established that the combination of seed inoculation with the application of mineral fertilizers intensified the processes of growth and development of plants, caused an increase in the number of beans and grain weight per plant, as well as the mass of 1000 grains, as a result - yield increased by 0.42-0.58 t / ha . The maximum level of yield was provided by a combination of pre-sowing inoculation of seeds with Rhizohumin with fertilizer application in a dose N60P60K60.