Effect of nitrogen levels on growth and yield of wheat at different elevations under rain-fed conditions in jebel marra highlands
2006
Ahmed, A.H., Agricultural Research Corporation, Nyala (Sudan). Nyala Research Station | Ahmed, M.F., Agricultural Research Corporation, Nyala (Sudan). Nyala Research Station | Burhan, H.O., Agricultural Research Corporation, Nyala (Sudan). Nyala Research Station | Ahmed, F.E., Agricultural Research Corporation, Nyala (Sudan). Nyala Research Station
A field experiment was conducted at two sites for two seasons, 2000-01 and 2002-03 at farmers fields to investigate the effect of four nitrogen levels; 0, 20, 40 and 60 kg N/ha, at two elevations; Trongotonga at 2800 m above sea level (a.s.l.) and Gorlambang at 2300 m a.s.l. on growth and yield of three wheat cultivars; Debera, El Nelein and a local variety Donki, in Jebel Marra highlands. Results showed that nitrogen application significantly increased flag leaf area, plant height in both elevations. As for yield and yield components, a positive increase in grain yield was obtained as a result of nitrogen application. The pattern of response of spikelets per spike, seeds per spike, number of spikes per m2 was similar to that of grain yield. Nitrogen fertilizer, generally, decreased the 1000-seed weight and harvest index. Nitrogen percentage of plants at 50% anthesis and grain nitrogen percentage increased gradually with increasing nitrogen levels. Generally, the crop at high elevation site, gave greater biomass yield, grain yield and yield components. El Nelein variety was the earliest to flower and mature and produced higher grain and biomass yields with increased N levels. The local variety Donki was the latest to flower and mature, and gave the lowest yield and yield components
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