Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 409

Full Length Research Paper

Effect of phosphorus and organic matter on phosphorus status of winter wheat at different part and growth stages

Maryam Zahedifar1*, Najafali Karimian1, Abdolmajid Ronaghi1, Jafar Yasrebi1, Yahya Emam2 and Ali Akbar Moosavi1
  1Department of Soil Science, College of Agriculture, Shiraz University, Shiraz, Iran. 2Department of Crop Productions and Plant Breeding, College of Agriculture, Shiraz University, Shiraz, Iran.
Email: [email protected] com

  •  Accepted: 01 November 2011
  •  Published: 15 December 2011

Abstract

 

Knowledge about nutrient demands of plants at different growth stages is important in scheduling the fertilizer application. This study was conducted to determine the influence of three phosphorus (P) levels [0, 25, and 50 mg kg-1 soil as (Ca (H2PO4)2] and two organic matter (OM) levels (0 and 2% w/w as feedlot cattle manure) on winter wheat (Triticum aestivum L.) characteristics and P status in different parts at various growth stages under greenhouse-conditions. Number of tillers, grains, and spickles; spickle-length, grain-yield, and 1000-grain weight increased with P and OM applications. Maximum shoot-dry-matter-yield (SDMY) was obtained with 50 mg P kg-1 soil application at stage 8 (dough development). Shoot-P-concentration was the highest at early stages, but decreased later on. Shoot P uptake increased with P and OM applications and also with growth stages. Phosphorus and OM applications increased P uptake of stem, spickle, and flag-leaf. Furthermore, effects of P and OM treatments on flag-leaf DMY were similar to those of stem. Stem and flag-leaf P uptake decreased at dough development to ripening stages, but spickle-P-uptake increased. Critical P concentration of shoot and flag-leaf decreased with plant growth; whereas, that of spickle increased. Results confirmed that wheat-plants required much more P at early stages. The tentative conclusion is that flag-leaf P analysis, instead of stem, may be used to evaluate the nutritional status of winter wheat.

 

Key words: Flag leaf analysis, phosphorus nutrition status, crop characteristics, wheat growth stages.