Plant Soil Environ., 2015, 61(3):137-143 | DOI: 10.17221/1005/2014-PSE

The efficiency of nitrogen and sulphur fertilization on yields and value of N:S ratio for Lolium × boucheanumOriginal Paper

B. Grygierzec¹, L. Luty², K. Musiał³

¹ Department of Grassland Management, Institute of Plant Production, University of Agriculture, Krakow, Poland

² Department of Mathematical Statistics, University of Agriculture, Krakow, Poland

³ Malopolska Association for Agricultural Extension in Krakow, Krakow, Poland

This paper deals with the efficiency of nitrogen (N) and sulphur (S) fertilization on yields and value of N:S ratio for hybrid ryegrass cultivated in monoculture and in a mix with white clover. The research was carried out from 2011-2013 near Krakow in southern Poland. Plants were evaluated in the context of diversified fertilization with nitrogen at rates of 50 and 100 kg N/ha as well as two sulphur-based fertilizers: Arista siarka and Pro-siarka, used at rates of 5, 10, 15 kg S/ha. Independent research findings have shown a clear synergism between nitrogen and sulphur, namely fertilization with sulphur in the form of Arysta siarka and Pro-siarka fertilizers that increased the yields of total aboveground biomass of the plants, from all cuts and decreased the values of the N:S ratio. The highest average dry matter yield was determined after the use of 50 kg N/ha and 15 kg S/ha in the form of Pro-siarka fertilizer, compared to fertilization with 50 kg N/ha, amounting to 0.52-2.08 t/ha for hybrid ryegrass and 0.15-2.40 t/ha for hybrid ryegrass with white clover, respectively. The highest average narrowing of the N:S ratio was calculated in plants fertilized with 100 kg N/ha and 15 kg S/ha in the form of Pro-siarka fertilizer.

Keywords: crop production; nutrient; Trifolium repens; sulphur deficiency; grassland management

Published: March 31, 2015  Show citation