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Pakistan Journal of Nutrition
Year: 2006  |  Volume: 5  |  Issue: 3  |  Page No.: 206 - 211

Differences in the Performance and Phosphorus-Use Efficiency of Some Tropical Rice (Oryza sativa L.) Varieties

E.A. Akinrinde and T. Gaizer    

Abstract: Deficiency of phosphorus (P) is widespread in tropical and temperate acid soils. Six rice (Oryza sativa L) varieties (TOX 4008 – 34, TOX 3499-84, FARO 51, LOCAL CHECK, FAROX 317, and WAT 107 – TGR) were evaluated for their P nutrition capability at 0, 50, 100, 150 and 200 mg kg-1 levels of P applied in an Alfisol. Plant height (from 3 weeks after planting, WAP), number of tillers (from 4 WAP), as well as dry matter (DM) yields, P concentration and uptake in partitioned plant parts and P - use efficiency parameters were estimated after 6 weeks of growth. Plant height at 4 WAP, content and uptake of P determined in shoot and root were significantly (P < 0.01) influenced by P application rates. The varieties also differed significantly in their growth; DM production and P - use efficiency, thus permitting their categorization into efficient or non-efficient and responsive or non-responsive types.

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