The influence of climate conditions and fertilizer rates calculated by different methods on spring wheat crop

Abstract

In 2011–2015, at the Rumokai Experiment Station of the Lithuanian Research Centre for Agriculture and Forestry research was carried out with spring wheat on Bathihypogleyi-Calc(ar)ic Luvisol (LVk-gld-w) with predominant silt loam ant clay loam. The main aim was to determine the influence of climate conditions and fertilizer rates calculated by different methods on spring wheat. Five years of research have shown that using the Fertilization Program “Derlius” of the Agrochemical Laboratory at the Lithuanian Research Centre for Agriculture and Forestry, during spring wheat fertilization the nitrogen fertilizers were less consumed by 15.8%, phosphorus by 81.9% and potassium by 41.1% compared with fertilization for obtaining the planned 5 t ha–1 spring wheat grain yield. Also, the studies have shown that climatic conditions in the eastern part of the Baltic Sea greatly affect the yield of spring wheat. The yield of wheat grain and straw, and the number of productive stems correlated with the amount of precipitation and the sum of active temperatures in spring wheat BBCH 21–37 growth stages. A negative correlation was established in the growth stages BBCH 61–89 between higher rainfall and spring wheat yields. The average data from the five years of research showed that the sum of active temperatures during wheat growth increased nitrogen, phosphorus and potassium in the straw, and phosphorus and potassium concentrations in the grain.

The Effect of Genotype, Climatic Conditions and Nitrogen Fertilization on Yield and Grain Protein Content of Spring Wheat (Triticum aestivum L.)

“…The importance of efficient N fertilization for yield and quality of spring wheat has been highlighted by many researchers. Among the factors that have a significant impact are the dose of N fertilization (Jaćimović et al, 2008;Staugaitis et al, 2017) source of N fertilizer (Jarecki et al, 2017), timing of N application (Rawluk et al, 2000;Woolfolk et al, 2002;Karamanos et al, 2005), culture rotation (Kaerner, 1999;Halvorson et al, 2000), frequency of rainfall and temperature during the growing season (Zhang and Oweis, 1999). A recommended technique for synchronizing the N supply with the wheat N demand is split application of the N fertilizer (Nyiraneza et al, 2012).…”