Differences in the performance and phosphorus-use efficiency of some tropical rice (Oryza sativa L.) varieties
Pakistan Journal of Nutrition
Department of Agronomy, University of Ibadan, Ibadan, Nigeria; Institute of Soil Science and Land Evaluation (310), University of Hohenheim, 70593 Stuttgart, Germany
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. © Asian Network for Scientific Information, 2006.
phosphorus; article; biomass production; chemical composition; concentration (parameters); controlled study; nonhuman; nutritional value; phase partitioning; plant growth; plant height; plant identification; plant root; planting time; quantum yield; rice; shoot; soil acidity; soil analysis; tropics; varietas; Oryza sativa