Effect of nitrogen on the growth, yield and grain protein content of barley (Hordeum vulgare).
1990
Birch C.J. | Long K. E.
for barley cvv. Grimmett, Galleon and Corvette grown in southern Queensland under irrigated conditions, N delayed maturity in all cultivars, especially in Galleon. Total tiller number and fertile tiller number were increased by N and there was a significant cultivar x N rate interaction. Similar trends were evident in total dry matter at maturity and grain yield, with Galleon producing the highest yields. Fertile tiller percentage was reduced by increasing N rate. Grain protein content increased with the increasing N rate, with differences in the nature of the response between cultivars. Plant breeding programs should consider variation in grain yield and protein content in response to N supply and select for efficiency of utilisation of N. Recommended N rates for irrigated barley could be 150-200 kg N per ha. Lower rates will promote strong yield responses, but protein content would remain low.
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