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Evaluation of the Performance of Upland Rice Cultivars as Affected by Fertilizer Levels in a clay Loam Ultisol
Abstract
A field experiment was conducted under rain-fed condition during the 2006 and 2007 planting seasons in Nara, Enugu (060 52’N and 070 15’E) in the Derived Savanna of Southeast agro-ecological zone of Nigeria, to evaluate the growth and yield performance of different upland rice cultivars under various fertilizer levels. The cultivars were NERICA – I, WAB – 189, NERICA – II, ITA – 150, and the fertilizer levels were 100kg ha-1 NPK 15 – 15 – 15 + 100kg ha-1 urea, 200kg ha-1 NPK 15 – 15 – 15 + 100kg ha-1 urea and 300kg ha-1, NPK 15 – 15 – 15 + 100kg ha-1 urea. A 4 x 3 factorial was laid out in a Randomized Complete Block Design with three replications. Results obtained show that the effects of cultivars and fertilizer rates on days to 50% heading, days to maturity, number of tillers and productive tillers, panicle count, and grain yield were highly significant. The interaction effects of cultivar and fertilizer were also significant for days to maturity, number of tillers and productive tillers, and panicle count. It was observed comparatively that WAB – 189 significantly (p = 0.05) performed better in the study area in terms of panicle and grain yield when NPK 15 – 15 – 15 at 300kg ha-1 + 100kg ha-1 urea fertilizer was applied, followed by NERICA – I
Key words: Upland rice, fertilizer levels, Productivity
