Effect of topdressing with nitrogen and boron on the yield and quality of rapeseed

• Published in: Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis Vol. 58; no. 5; pp. 391 - 398
• Main Authors: Varga, L.,Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin, Lozek, O.,Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin, Ducsay, L.,Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin, Kovacik, P.,Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin, Losak, T.,Mendelova Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin, Hlusek, J.,Mendelova Univ., Brno (Czech Republic). Ustav Agrochemie, Pudoznalstvi, Mikrobiologie a Vyzivy Rostlin
• Format: Journal Article
• Language: English
• Published: Mendel University Press 2010
• Subjects: ABONADO DE COBERTURA; ABONOS NITROGENADOS; ACIDE HUMIQUE; ACIDO HUMICO; AMMONIUM NITRATE; APLICACION DE ABONOS; APPORT EN COUVERTURE; BORE; BORO; BORON; BRASSICA NAPUS; CONTENIDO DE LIPIDOS; CONTENIDO PROTEICO; CROP YIELD; CRUDE PROTEIN; CULTIVOS DE INVIERNO; CULTURE D'HIVER; DATOS METEOROLOGICOS; DONNEE METEOROLOGIQUE; ENGRAIS AZOTE; ENVIRONMENTAL TEMPERATURE; FERTILISATION; FERTILIZER APPLICATION; GRAINE; GRAINE DE COLZA; http://www.fao.org/aos/agrovoc#c_10176; http://www.fao.org/aos/agrovoc#c_1018; http://www.fao.org/aos/agrovoc#c_1066; http://www.fao.org/aos/agrovoc#c_10795; http://www.fao.org/aos/agrovoc#c_16379; http://www.fao.org/aos/agrovoc#c_24013; http://www.fao.org/aos/agrovoc#c_24917; http://www.fao.org/aos/agrovoc#c_25499; http://www.fao.org/aos/agrovoc#c_2598; http://www.fao.org/aos/agrovoc#c_29564; http://www.fao.org/aos/agrovoc#c_352; http://www.fao.org/aos/agrovoc#c_36510; http://www.fao.org/aos/agrovoc#c_3685; http://www.fao.org/aos/agrovoc#c_4360; http://www.fao.org/aos/agrovoc#c_5195; http://www.fao.org/aos/agrovoc#c_5328; http://www.fao.org/aos/agrovoc#c_6139; http://www.fao.org/aos/agrovoc#c_6161; http://www.fao.org/aos/agrovoc#c_6251; http://www.fao.org/aos/agrovoc#c_6946; http://www.fao.org/aos/agrovoc#c_7182; http://www.fao.org/aos/agrovoc#c_7813; http://www.fao.org/aos/agrovoc#c_8090; HUMIC ACIDS; LIPID CONTENT; NITRATE D'AMMONIUM; NITRATO DE AMONIO; nitrogen; NITROGEN FERTILIZERS; NUTRICION DE LAS PLANTAS; NUTRITION DES PLANTES; OIL CROPS; PESO DE LAS SEMILLAS; PLANT NUTRITION; PLANTAS OLEAGINOSAS; PLANTE OLEAGINEUSE; POIDS DES SEMENCES; POTASIO; POTASSIUM; PRECIPITACION ATMOSFERICA; PRECIPITATION; PROPIEDADES FISICO - QUIMICAS SUELO; PROPRIETE PHYSICOCHIMIQUE DU SOL; PROTEIN CONTENT; PROTEINA BRUTA; PROTEINE BRUTE; RAPESEED; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; SEED WEIGHT; seed yield; SEEDS; SEMILLA; SEMILLA DE COLZA; SOIL CHEMICOPHYSICAL PROPERTIES; TEMPERATURA AMBIENTAL; TEMPERATURE AMBIANTE; TENEUR EN LIPIDES; TENEUR EN PROTEINES; TOPDRESSING; TSW; UREA; UREE; WEATHER DATA; WINTER CROPS
• ISSN: 1211-8516; 2464-8310
• DOI: 10.11118/actaun201058050391

Field trials with winter rape (Brassica napus var. napus, variety Rasmus) were established in August in the years 2002-2004 in order to evaluate the effect of supplementary spring topdressing with nitrogen and boron in the BBCH 29-30 stage. Seed yields and seed qualitative characteristics (TSW, content of oil and crude protein) were followed. We applied DAM-390 (solution of ammonium nitrate and urea, 30% N) at a rate of 30 kg N/ha and Humix Bor (humic acids + N, K, B) at a rate of 0.240 kg B/ha. Different weather conditions in the different years had a significant effect on seed yields as follows: 2003: 1.80-2.29 t/ha; 2004: 2.60-3.35 t/ha; 2005: 2.45-3.29 t/ha. The significant decrease in seed yields in the first year of the experiment was caused namely by the deficit in precipitation in January, February and June 2003 and high temperatures in May and June in the same year. In terms of the individual years and the three-year average the application of Humix Bor itself did not significantly improve seed yield and quality. The application of the N fertiliser alone or in combination with Humix Bor increased seed yields and the crude protein content by 22.4-30.7 % and 4.0-4.9 rel. %, respectively. The significantly highest seed yields (2.98 t/ha) were achieved when the plants were treated with a combination of nitrogen and Humix Bor as compared to all the other treatments (2.28-2.79 t/ha). The oil content in seeds increased significantly to 44.1% only when treated with a combined application of DAM-390 and Humix Bor as against the unfertilised control (42.8%). Fertilisation did not change the TSW which ranged only between 4.47 and 4.67 g.