Yield response of grass and grass-clover leys in crop rotations to Phosphorus fertilization

Autor: Steinfurth, Kristin; Holton Rubæk, Gitte; Hirte, Juliane; Buczko, Uwe
In:

Grassland at the heart of circular and sustainable food systems
Proceedings of the 29th General Meeting of the European Grassland Federation, Caen, France, 26-30 June 2022
Autor: Delaby, L.; Baumont, R.; Brocard, V.; Lemauviel-Lavenant, S.; Plantureux, S.; Vertès, F., Peyraud, J.L.
Bandangabe: Grassland Science in Europe, Volume 27
ISBN: 978-2-7380-1445-0
Seite: 731 - 733
Jahr: 2022

Einordung:
Institut: Professur Grünland- und Futterbauwissenschaften

Abstract:
Grass or grass-clover leys are important parts of many crop rotations, providing forage for livestock and exerting positive effects on soil structure and fertility. One of the most important nutrients for optimum ley and especially clover growth is phosphorus (P). Based on eight Swiss and Danish long-term field experiments, we examined the response of grass and grass-clover yields to up to 26 years of varying P fertilisation rates, the development of soil test P (STP) values and potential effects of clay content, organic carbon content and pH of the soil, average temperature and precipitation. While different fertilisation rates often resulted in significantly different STP values, yields mostly showed significant differences between unfertilised and fertilised treatments, but not between treatments with different fertiliser amounts. Increasing soil clay contents increased relative yields in relation to Olsen-P values.

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