Modifications of winter wheat grain yield and quality under different meteorological conditions | Ziemas kviešu šķirņu graudu ražas un kvalitātes izmaiņas dažādos meteoroloģiskajos apstākļos
2019
Strazdina, V., Latvia Univ. of Life Sciences and Technologies, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia). Inst. of Agricultural Resources and Economics. Dept. of Field Crops Breeding and Agroecology | Fetere, V., Latvia Univ. of Life Sciences and Technologies, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia). Inst. of Agricultural Resources and Economics. Dept. of Field Crops Breeding and Agroecology
The aim of this study was to determine the changes of winter wheat varieties grain yield and quality under different meteorological conditions. The research was conducted in the time period from 2016 to 2018 at Stende Research Centre of the Institute of Agricultural Resources and Economics. In 2018 vegetation period drought and heat stresses affected negative growth and development of the winter wheat plants and substantially reduced the crop yield. The significant reduction of grain yield was observed for all winter wheat varieties in comparison with grain yield in 2016 and 2017 when moisture content in soil and average air temperature were suitable for formation of high yield potential. Obviously, the range method shows the difference of winter wheat varieties yield stability during three years. Grain quality (TGW and protein content) was also affected by meteorological conditions. The relationship between grain yield, protein content and TGW was determined. The research results showed the significant positive correlation between TGW and yield (r=0.461 is greater than r sub(0.05)=0.200) in 2016 and significant negative correlation between yield and protein content (r=−0.476 is greater than r sub(0.05)=0.200) in all three years.
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