The effect of nitrogen fertilization and sowing rate on the yield and chemical composition of the grain of spring barley grown for fodder

Noworolnik, K.; Ruszkowska, B.

Pamietnik Pulawski 72: 63-76


ISSN/ISBN: 0552-9778
Accession: 001005748

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In field trials in 1975-7 at 69 locations in the regions of spring barley cultivation in Poland, spring barley cv. Aramir, Berac, Gryf, Trumpf, Polon, Diva and B-9/577 were sown at 0.24, 0.21, or 0.38 X 106 seeds/ha and given 30, 60 or 90 kg N/ha. Detailed data are presented for the effects of the various factors on grain yields and on the chemical composition of the grain. The cv. varied in their response to increasing rates of N. The highest rate of N was recommended for Aramir and B-9/577, but the lowest rate was best for Diva, Bera, Polon and Gryf. Applications of 60 and 90 kg N/ha both increased grain and protein yields compared with 30 kg N/ha. The highest rate of N gave significant yield increases on good wheat soils, in yr with sufficient rainfall during the growing season and with the opt. sowing date. 60 and 90 kg N/ha increased grain CP content and decreased the contents of N-free compounds but did not affect the contents of fat, CF or ash in the grain, compared with the lowest rate. Opt. yields were obtained with a sowing rate of 0.31 X 106 seeds/ha but sowing rate did not affect the chemical composition of the grain.