EFFECT OF SOWING DEPTH ON GRAIN YIELD AND ITS COMPONENTS OF SIX BREAD WHEAT CULTIVARS

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20/10/2014 11:43 AM

EFFECT OF SOWING DEPTH ON GRAIN YIELD AND ITS COMPONENTS OF SIX BREAD WHEAT CULTIVARS


 
K. A. Jaddoa H. A. Baqir/ Departmet of Field Crop Scienences - College of Agriculture - University of Baghdad


ABSTRACT

Afield experiment was carried out at the experimental farm, Department of Field Crop Sciences , College of Agriculture - University of Baghdad during the growing seasons (2008- 2009) and (2009- 2010). Six wheat cultivars were grown by using the randomized complete blok design in the arrangement of split - plots with four replicates . Main plots contained the seeding depths 3,6,9 and 12 cm . While the cultivar (IPA -99 , Flamour , Abu – Ghraib -3 , AL.Fateh ,IPA -95 and Sham -6) occupied the sub – plots. The objective was to investigate the effect of seeding depth on the grain yeild and its components of theses cultivars. Plants of all cultivars grown at 6 cm depth gave the highest averages of spike number . m-2 and 1000 grain weight (555.70, 536.83 spike. M 2 and 43.87 , 35.70 g) in both seasons, respectively . These were translated in the higher biological yield 20.27 and 18.57 t.ha -1 and ultimately with higher grain yield 7.17 and 6.05 t.ha-1 in both season, respectively. Consequently the harvest index was increased to 34.59 and 32.79 % in both seasons , respectively . The cultivar IPA -99 gave the highest averages of grain yield components i.e ,grain number .spike -1 and 1000 grain weight (63.62, 57.92) and (42.90, 34.95) in both seasons, respectively. Hence, the grain yield of this cultivar was the highest (7.38 and 6.02) t.ha1- compared with the lowest grain yield of Abu- Ghraib-3 (3.93 and 3.14 t. ha-1) in both seasons, respectively. For interaction , the results showed significant differences only in the second season where IPA -99 grown at 6cm depth gave the highest average grain yield (8.19 t.ha-1) , while Abu-Ghraib-3 grown 12 cm gave the lowest average of grain yield (1.97t.ha)



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