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Plant and Soil

, Volume 111, Issue 1, pp 105–109 | Cite as

Rice cultivar evaluation for phosphorus use efficiency

  • N. K. Fageria
  • R. J. Wright
  • V. C. Baligar
Article

Abstract

Phosphorus deficiency is one of the most growth-limiting factors in acid soils in various parts of the world. The objective of this study was to screen 25 rice cultivars (Oryza sativa L.) at low, medium, and high levels of soil P. Number of tillers, root length, plant height, root dry weight and shoot dry weight were related to tissue P concentrations, P uptake and P-use efficiency. Shoot weight was found to be the plant parameter most sensitive to P deficiency. Significant cultivar differences in P use efficiency were found. Phosphorus use efficiency was higher in roots than shoots and decreased with increasing levels of soil P. Positive correlations were found among growth parameters such as plant height, tillers, root and shoot weight, and P content of roots and shoots. These results indicate selection of rice cultivars for satisfactory performance under low P availability can be carried out using shoot and root dry weight as criteria.

Key words

Oryza sativa L. P uptake P use efficiency root and shoot weight 

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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • N. K. Fageria
    • 1
    • 2
  • R. J. Wright
    • 1
    • 2
  • V. C. Baligar
    • 1
    • 2
  1. 1.Contribution from National Rice and Bean Research Center of EMBRAPAGoiania-GoBrazil
  2. 2.USDA-ARS-Appalachian Soil and Water Conservation Research LaboratoryBeckleyUSA

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