Effects of Shading on Rate and Duration of Grain Filling and Yield of Faba Bean Cultivars

Document Type : Research Paper

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Abstract

Two field experiments were conducted at the Research Farm of Tabriz University in 2002 and 2003, to evaluate effects of shading on rate and duration of grain filling and yield of faba bean cultivars. Seeds of three faba bean cultivars including Barakat, Saraziri and HBP-B were sown by hand on 28 April 2002 and 7 May 2003. Both experiments were split- plot, based on randomizedcomplete block design with three replications. Shading levels and cultivars were allocated to the main and sub-plots, respectively. Shading treatments consisted of no shade (control), 18%, 48% and 70% shade. Grain filling duration was similar for faba bean cultivars. However grain filling rate and maximum grain weight of Barakat and Saraziri were higher than HBP-B. Although, mean grain weight of barakat and saraziri were significantly higher than HBP-B, but HBP-B was clearly superior in production of the number of grain per plant  and grain yield per unit area. Grain filling duration under shade was 3-4 days longer than under control, which resulted in producing comparatively larger grains under shade. Consequently, mean grain yield of faba bean per unit area for shaded plants was higher than that for unshaded plants. Therefore, faba bean can be successfully used in intercropping and agro forestry, where shadind is a limiting factor.
 

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References

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JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION
Volume 21, Issue 3 - Serial Number 3
November 2011
Pages 47-57

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