The impact of nitrogen and sulphur on spring wheat productivity and their contents in grain
2012
Siaudinis, G., Lithuanian Research Centre for Agriculture and Forestry, Klaipeda (Lithuania). Vezaiciai Branch | Lazauskas, S., Lithuanian Research Centre for Agriculture and Forestry, Dotnuva (Lithuania). Agricultural Inst.
In order to determine how nitrogen and sulphur fertilizers influence spring wheat cv. 'Munk' productivity, three-year field studies were carried out at the Lithuanian Institute of Agriculture in Dotnuva, Central Lithuania. The experiments were composed of three N rates (0, 60 and 120 kg/ha) and three S rates (0, 15 and 30 kg/ha). Year (or growing conditions) significantly influenced the number of ears per square m, 1,000 grain weight, grain yield and number of grain per ear. The highest grain yield (5,540 kg/ha on average) was obtained in moderately cool growing season with optimal moisture regime. N rate increased the number of ears per square m, grain yield, number of grains per ear. However, it decreased 1,000 grain weight. S rate positively and significantly influenced only the number of grains per ear. The use of N60 rate ensured the highest N and S fertilization efficiency. N and S concentrations in grain highly varied between the years. N120 rate substantially increased N concentration in grain; S30 rate had a similar effect. S application decreased the N:S ratio, thus substantially improving grain quality.
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