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Sudan Journal of Agricultural Research

Effects of mother bulb size and nitrogen nutrition on the production of onion seeds in Rahad, central Sudan

Asim Fadl Abu-Sarra

Abstract


A field trial was conducted at Rahad Research Station over four consecutive seasons (1999 – 2003) to study the effects of mother bulb size and level of nitrogen nutrition on seed yield of the red onion cv. "Saggai Improved". Three mother bulb sizes, viz: small (35 to <45), medium (45 to <55 mm) and large (55 to <65 mm), and four N levels, viz: None, 43, 86 and 129 kg N/ha, were tested in a factorial treatments structure fitted in RCB design. Results indicated that, the medium-sized bulbs and nitrogen at the level of 86 kg N/ha constituted the most suitable recipe for optimum seed production at Rahad; particularly when mother bulbs were planted in double rows per 80 cm ridges at 15 cm in-row spacing and nitrogen was applied in two equal doses. The seed yield obtained at Rahad was comparable to that reported for northern Sudan and better than the yield obtained at Kassala and New Halfa in eastern Sudan.

 

Sudan Journal of Agricultural Research Vol. 9 (2007) PP. 33-39