Nitrogen fertilizer effects on winter wheat yield and quality | Slāpekļa mēslojuma ietekme uz ziemas kviešu ražu un kvalitāti
2015
Litke, L., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Agrobiotechnology | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Agrobiotechnology
One of the most important crops in Latvia is winter wheat (Triticum aestivum L.). Winter wheat yield and grain quality depends on the used nitrogen fertilizer which is one of the most dynamic plant nutrients in the soil. The study aims to justify the maximum allowable nitrogen fertilizer rates of winter wheat economically. Field trials were carried out at the LLU Research and Study farm „Pēterlauki” in 2014/2015. Eight different nitrogen topdressing rates were used (N0, N60, N90, N120, N150 (90+60), N180 (90+60+30), N210 (90+70+50), N240 (120+60+60)) in two soil tillage treatments (traditional where the mould-board ploughing was performed and reduced tillage). Field trial results showed that carrying out the mould-board (20–22 cm depth) ploughing the winter wheat yields were slightly higher if compared with reduced tillage (10-13 cm depth) variant, but the difference was not significant at the 95% probability level. After increasing nitrogen fertilizer rate grain yield increased and grain quality indicators improved.
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