Effect of mineral fertilizers on the formation of the structure indicators of grain sorghum yield capacity

Abstract

In the process of gradual warming, producers carry out the search of the crops, which develop high productivity of excellent quality grain in the difficult soil-climatic conditions. Grain sorghum is one of these crops. Similar to any other agricultural crop, its productivity depends on the effect of numerous factors including the elements of the cultivation technology. One of these elements is the application of mineral fertilizers. The purpose of the research was to study the effect of the plant mineral nutrition on the formation of the structure indicators of grain sorghum yield capacity in the conditions of the Right bank Forest steppe zone of Ukraine. The experiment was carried out in the zone of unstable humidity in 2016–2020. The trial scheme consisted in studying grain sorghum cultivars and various fertilizer rates; the trial was initiated with the method of regular replications, a fourfold replication was applied. Having analyzed the research results, it was found out that as the fertilizer rates increased, the element indicators of the yield structure also increased; in turn grain yield capacity of the studied cultivars was higher. However, the optimal fertilizer rate for the expected yield is the estimated one which will reduce the production cost of the output.