EFFECT OF BIOSTIMULANT APPLICATION ON WINTER OILSEED RAPE YIELD UNDER DIFFERENT NPK AND S FERTILIZATION

Rafał Nowak; Małgorzata Szczepanek; Karolina Błaszczyk

doi:10.37660/aspagr.2021.20.4.4

Rafał Nowak Department of Agronomy, Bydgoszcz University of Science and Technology Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
Małgorzata Szczepanek Department of Agronomy, Bydgoszcz University of Science and Technology Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland http://orcid.org/0000-0003-1354-5627
Karolina Błaszczyk Department of Agronomy, Bydgoszcz University of Science and Technology Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland

DOI: http://dx.doi.org/10.37660/aspagr.2021.20.4.4

Abstract

Background. The "Green Deal" strategy introduced in the European Union countries assumes the reduction of mineral fertilization by 20%. This goal can be achieved by increasing the use of mineral fertilizers by field crops. Fertilization with sulfur and the use of biostimulants may prove to be an effective and environmentally safe method of increasing the efficiency of NPK fertilization in oilseed rape.
Material and methods. In 2011–2013, a study was carried out to assess the effect of sulfur fertilization and the use of a biostimulant based on an alga extract (Ecklonia maxima Osbeck) on biometric characteristics of plants, fertilization efficiency and the yield of winter oilseed rape under low and high NPK rates.
Results. The quantity of mineral NPK fertilization rates had the greatest impact on the seed yield. Regardless of the NPK rates, the application of the biostimulant and sulfur significantly increased the seed yield. These factors positively affected the number of pods on the main shoot and side shoots as well as the number of seeds per pod.
Conclusion. The biostimulant application increased the agronomic effectiveness of fertilization.