Improving the performance of transplanted rice by seed priming

M. Farooq*, S. M.A. Basra, N. Ahmad

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

Transplanting is the major method of rice cultivation in the world, in which seedlings are raised in nursery and then transplanted into well puddle and prepared fields. The traditional nursery sowing method is tedious and produces week seedlings that reduce the final yield due to high mortality. The potential of seed priming to improve the nursery seedlings and thus the transplanted rice was evaluated in the present study. The experiment was conducted in the rice growing area (31.45° N, 73.26°E, and 193 m) of Pakistan, during 2004-2005. Seed priming tools employed during the investigation included traditional soaking, hydropriming for 48 h, osmohardening with KCl or CaCl 2s -1.25 MPa) for 24 h (one cycle), 10 ppm ascorbate for 48 h or seed hardening for 24 h. Priming improved the initial seedling vigor and resulted in improved growth, yield and quality of transplanted fine rice while traditional soaking behaved similar to that of untreated control. Osmohardening with CaCl2 resulted in the best performance, followed by hardening, ascorbate priming and osmohardening with KCl. Osmohardening with CaCl2 produced 3.75 t ha-1 (control: 2.87 t ha-1) kernel yield, 11.40 t ha-1 (control: 10.03 t ha-1) straw yield and 24.57% (control: 22.27%) harvest index. The improved yield was attributed due to increase in the number of fertile tillers. Significant positive correlation was found between mean emergence time of nursery seedlings and kernel yield, nursery seedling dry weight and kernel yield, fertile tillers and kernel yield, and leaf area duration and kernel yield.

Original languageEnglish
Pages (from-to)129-137
Number of pages9
JournalPlant Growth Regulation
Volume51
Issue number2
DOIs
Publication statusPublished - Feb 2007
Externally publishedYes

Keywords

  • Fine rice
  • Hardening
  • Nursery raising
  • Osmohardening
  • Quality
  • Transplanting
  • Yield

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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