Relationship between Rapid Canopy Closure and Grain Yield in Wheat

سال انتشار: 1387
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,733

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شناسه ملی سند علمی:

RCANR03_081

تاریخ نمایه سازی: 7 تیر 1388

چکیده مقاله:

In order to determine the relationship between rapid canopy closure and grain yield in wheat and to identify the traits that affect rapid canopy closure, a research was conducted using 5 wheat cultivars (Atrak, Tajan, Zagros, Golestan and Viniak). A Field experiment with randomized complete blocks was carried out at the Gorgan University of Agricultural Science and Natural Resources, in 2003 – 2004. Rapid canopy closure had significant effect on grain yield; cultivars with faster canopy closure produced comparatively more grain yield per unit area. Leaf area index and seedling dry weight at the beginning of the exponential growth phase; relative leaf area development rate and relative growth rate during the exponential phase and the average of individual leaf area and leaf area ratio were detected as the effective traits in rapid canopy closure. It was concluded that the RCC is an appropriate way especially in the environment where growing season is limited and there is little scope for lengthening the growing season in order to increase dry matter production and yield.

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نویسندگان

T. Mir-Mahmoodi

Department of Agronomy and Plant Breeding , Faculaty of Agriculture, Islamic Azad University, Mahabad Barnch , Iran

H Soleimanzadeh

Department of Agronomy and Plant Breeding, Faculty of Agriculture, Islamic Azad University , Pars Abad Moghan Barnch ,Iran

Soran sharafi

Department of Agronomy and Plant Breeding , Faculaty of Agriculture, Islamic Azad University, Mahabad Barnch , Iran

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  • RCC= Days to 30% canopy closure. ...
  • RCC= Days to 60% canopy closure. ...
  • RCC= Days to full canopy closure. ...
  • RDR = relativ leaf area development rate during the exponential ...
  • SDM = Seedling dry matter at beginning of exponential growth ...
  • RGR = relative growth rate during the exponential phase (gr/gr/GDD). ...
  • ILA= Average of individual leaf area (cm). ...
  • LER= Leaf emergence rate during the exponential phase (day). ...
  • LAR= leaf area ratio during the exponential phase (cm:/gr). ...
  • GY= Grain yield (kg/ha). ...
  • نمایش کامل مراجع