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Title

EFFECT OF NITROGEN FERTILIZER ON LIGHT INTERCEPTION AND LIGHT EXTINCTION COEFFICIENT IN DIFFERENT WHEAT CULTIVARS

Writers

SAMADIYAN F. | SOLEYMANI A.

Pages

 Start Page 71 | End Page 72

Abstract

 Introduction Wheat (Triticum aestivum) is a cereal grain, originated from the levant region of the near east and Ethiopian highlands, currently cultivated worldwide. Light extinction coefficient K is a coefficient that represents the amount of light reduced by the plant. Light or radiation extinction coefficient is a concept that expresses the light penetration decrease into the canopy in the way the upper leaves of the canopy with less angles have lower amount of K in comparison with the horizontal leaves. Greenet al., (2003) stated that nitrogen fertilizer increased light absorption by plant leaves; and affects the yield. The distribution patterns of nitrogen allocation in leaves are more exposed therefore photosynthesis rate per unit leaf area and canopy were optimized.Differences in canopy structure by the light extinction coefficient (k) of the Act Lambert - Beer is described, along LAI differing due to different species and genotypes which are important factors in absorption and light use efficiency. This experiment was performed to evaluate the maximum light absorption and light extinction coefficient in different levels of nitrogen usage and wheat cultivars.....

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