The effect of nitrogen fertilizer and planting density on the yield and composition of Rhodes grass grown under irrigation in Saudi Arabia

A.N.aim, A.; Farnworth, J.

Publication, Joint Agricultural Research and Development Project, University College of North Wales, Bangor and Ministry of Agriculture and Water, Saudi Arabia 12: 15


Accession: 000226943

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In an irrigated plot trial, Rhodes grass, planted at 20-, 30- or 40-cm spacings, was given annual applications of 200, 350 or 500 kg N/ha in 12 equal split applications. Plots were cut at 1-month intervals. Total annual yields were 25.8, 37.8 and 44.3 t DM/ha for plants given 200, 350 and 500 kg N/ha, respectively, at 30-cm spacing and 32.7, 44.3 and 38.1 t DM/ha for plants grown at 20-, 30- and 40-cm spacings, respectively, and given 500 kg N/ha. Yields were highest in May, June and July (maximum 5.3 kg DM/ha with 500 kg N/ha), but in Feb. there was no harvest because of insufficient growth. In Dec. there were 283, 412 and 269 tillers/m2 for 20-, 30- and 40-cm spacings, respectively. Mean CF content was 29-33% of the DM.