Sėjos laiko ir sėklos normos įtaka žieminių kviečių derlingumui bei grūdų kokybei

Abstract

The main key objective of the research is to compare the influence of sowing time and seed rate on winter wheat (Triticum aestivum L.) yield and grain quality. The experiment was performed in 2019–2020 at the test station of the Agricultural Academy of Vytautas Magnus University. The relief is a low undulating plain. The influence of sowing time on the productivity of winter wheat sown at different seed rate was investigated in a two–factor experiment. The granulometric composition was dominated by medium loam. The arable layer of the soil before the experiment was set up with neutral reactions (pH–7,0), medium humus content (2,05 %), high phosphorus content (241 mg kg-1 ) and medium potassium content (186 mg kg-1 ). Winter wheat is grown according to the technology applied at VMU Test Station. Pre-sowing - spring wheat. The total area of the field is 40 m2 , the accounting area is 20 m2 . The winter wheat variety ‘Skagen’ was studied in the experiment. The experiment was performed in four replicates. Repetitions are arranged randomized. Before sowing winter wheat fertilized N16P16K16 200 kg ha-1 . In the spring, when the vegetation resumes (March 19), it is fertilized with ammonium nitrate (N68). Later, ammonium nitrate was fertilized on April 8. – N61 and 29 April. – N41. Agricultural Academy of Vytautas Magnus University test station soil – carbonate deeper gleyic leachate (IDg4-k) (Calc (ar) i-Endohypogleyic Luvisol). The highest yields of winter wheat (11.1–10.5 t ha-1 ) were found after sowing 4.11, and on 26, sowing 5–3 million ha-1 seed rate. The lowest yields (9.7–8.2 t ha-1 ) were distinguished by the latest sowing (October 7) and (September 19) sow 4–2 million ha-1 rate sown wheat (9.6–9.8 t ha-1 ).[...]