Influence of the nitrogen fertilization on the multiplication effect of the gross energy and crude protein along the chain seed material yield of grain of sorghum (Sorghum bicolor L. Moench)

Svetla Kostadinova, Ivan Velinov, Zhivko Todorov, Dimo Penkov

Abstract: The aim of the study was to determine the effect of nitrogen fertilization on the yields of gross energy and crude protein from sorghum. For this purpose, “multiplication factors” have been introduced, representing the ratio between the gross energy and crude protein obtained per unit area and those input through the seeds. Six doses of nitrogen fertilization were tested (kg of nitrogen/ha - N0; N60; N120; N180; N240; N300). The average data for 3 years were: For gross energy - 801.3; 832.5; 948.6; 1057.7; 1072.1 and 970 times respectively. For crude protein - 806.6; 943.7; 1087.5; 1213.4; 1229.6 and 1178 times respectively. N180 and N240 stand out as the most optimal fertilizer requirements for both indicators.

Keywords: crude protein; gross energy; nitrogen fertilization; sorghum grain

Date published: 2021-12-08