Uman NUH | today: 07/14/2020

The effect of doses and ratios of fertilizers in the field crop rotation on the yield and quality of spring barley grain

Author(s) Hospodarenko G.M., Doctor of Agricultural Sciences, Professor, Uman National University of Horticulture, Ukraine
Prokopchuk I.V., Candidate of Agricultural Sciences, Associate Professor of Soil Science and Agricultural Chemistry, Uman National University of Horticulture
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Category The Agronomy
year 2020 issue Випуск 96 Частина 1
pages 205-218 index UDK 633.11:631.8
DOI 10.31395/2415-8240-2020-96-1-205-218 (Link)
Abstract The results of a long-term (8 years) application effect of different doses and ratios of fertilizers on podzolized chernozem in a field crop rotation under the conditions of the Right-bank forest steppe of Ukraine on the yield and quality of spring barley grain, the precursor of which was corn, were highlighted. Systematic application of fertilizers in crop rotation contributed to the increase of grain yield by 0.56-2.05 t/ha depending on the variant of experiment. Its highest increase was obtained in the variant of experiment, where fertilizer doses were calculated, taking into account the nutrient costs on the formation of planned crop yield (N110P60K80 per 1 ha of crop rotation area and on spring barley – N70P60K70). It should be noted that, on average, for three years of research in N70P60, N70P30K35, N70P60K35 і N70P30K70 experiment variants only a downward yield trend was registered. That is, spring barley can effectively use the aftereffect of fertilizers applied before its precursor and does not require high doses of fertilizers. It was found that different doses, ratios and types of fertilizers can increase crop yield by 17–61 %. The highest grain yields for three years of research (5,22 t/ha) were obtained for application of mineral fertilizers with a dose of N110P60K80 per 1 ha of crop rotation area, including spring barley – N70P60K70. An exception of the nitrogen component from the full fertilizer (N70P60K70) reduces its yield by 25 %, phosphorous – by 15 %, and potassium by only 5 %. The nature and mass of 1000 grains is largely formed by application of N55P30K40 on 1 ha of crop rotation area, and under spring barley directly - N35P30K35. Increase in grain protein content from the essential nutrients is mostly influenced by nitrogen. However, it has also been found that increase in grain protein content causes starch content decreases. A high invert correlation dependence (R2= -0.76) between these indicators was established.
Key words dose of mineral fertilizers, chernozem podzolized, spring barley, yield, grain nature, 1000 grains weight, protein
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