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Does reducing seed-P concentrations affect seedling vigor and grain yield of rice?
Plant and Soil
  • Juan Pariasca-Tanaka, Japan International Research Center for Agricultural Science
  • Elke Vandamme, Africa Rice Center
  • Asako Mori, Japan International Research Center for Agricultural Science
  • Zacharie Segda, Institut de l’Environnement et de Recherches Agricoles
  • Kazuki Saito, Africa Rice Center
  • Terry J Rose, Southern Cross University
  • Matthias Wissuwa, Japan International Research Center for Agricultural Science
Document Type
Article
Publication Date
1-1-2015
Peer Reviewed
Peer-Reviewed
Abstract
Aims Phosphorus (P) removed in grains causes losses of P from fields each year. Reducing grain P may therefore improve the P efficiency of cropping systems. This study quantified impacts of reduced seed-P concentrations on rice seedling vigor and final yields and investigated whether this was influenced by soil P supply or genotype. Methods Seed batches with P concentrations ranging from 0.9 to 3.5 mg g−1 were produced by growing rice in field plots ranging from severely P-deficient to fully fertilized and used in glasshouse and field experiments to investigate effects on seedling vigor and final grain/straw yield. Results ‘Genotype by seed-P concentration’ interactions were significant for seedling vigor but grain yield was generally not affected. This suggested some genotypes were sensitive to reduced seed-P concentration during the seedling stage while others with seed-P concentrations as low as 0.9 mg g−1 maintained rapid early vigor and high grain yield. Conclusions Results indicate it may be possible to reduce seed-P concentrations without having negative effects on seedling vigor or yield. The development of cultivars with reduced seed-P concentration, particularly if combined with rapid seedling root growth, could be a valid option to improve the sustainability of phosphate fertilizer use.
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Citation Information

Pariasca-Tanaka, J, Vandamme, E, Mori, A, Segda, Z, Saito, K, Rose, TJ & Wissuwa, M 2015, 'Does reducing seed-P concentrations affect seedling vigor and grain yield of rice?', Plant and Soil.

Published version available from:

http://dx.doi.org/10.1007/s11104-015-2460-2