Content and expense of nitrogen and phosphorus in barley genotypes
Keywords:
barley; genotypes; nitrogen; phosphorusAbstract
The concentration and expense of nitrogen and phosphorus in Bulgarian malting barley genotypes were examined. Varieties Obzor (state standard), Emon, Kaskadior and Krami and ten perspective breeding lines, selected by the Department of Genetics and Breeding at the Agricultural University –Plovdiv, were studied. It was established that the concentration of nitrogen in grain varies in the range from 2.01% in cultivar Emon to 2.81% in cultivar Kaskadior. Lines 5, 13 and 24 were distinguished with a low concentration of nitrogen in grain, which characterize them as perspective in terms of grain quality. The percentage of nitrogen in barley straw is 0.49-0.91% or more than two times lower than the concentration in grain. Breeding lines 17, 33 and 44 absorbed the largest amount of nitrogen and lines 13, 17 and 44 – the highest amount of phosphorus. Variety Krami and line 18 expended over 4 kg of nitrogen to form 100 kg grain, and variety Kaskadior and line 13 had the highest expense of phosphorus for grain formation of 100 kg.
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