Effect of nitrogen fertilizer application and sowing date and rate on yield and quality of grain of spring wheat cultivars grown after different preceding crops. Part I

Mazurek, J.; Kus, J.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roslin 177: 123-136


ISSN/ISBN: 0373-7837
Accession: 002358063

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In field trials at Osiny in 1976-82, spring wheat cv. Alfa, Jara and Kolibri grown after spring barley, oats, a cereal mixture or potatoes were sown as early as possible in a given year or 13-18 d later, at 4.5 or 6.0 million seeds/ha and were given 0, 80, 120 or 160 kg N/ha in a single or 3 split applications. The optimum sowing rate was 4.5 million seeds/ha regardless of the other factors. Delayed sowing greatly reduced grain yield. Yields were highest with 80 kg N/ha. Late sowing and higher N rates reduced 1000-grain weight. High N rates increased lodging and disease incidence, but also increased protein yield, grain protein and dry gluten content and sedimentation index. Sowing rate did not affect grain quality. Delayed sowing increased grain protein and dry gluten content and increased loaf volume of cv. Kolibri grown after potatoes. Seeds produced by late-sown crops showed reduced germination and vigour.