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Journal of Agronomy
Year: 2006  |  Volume: 5  |  Issue: 4  |  Page No.: 546 - 554

Role of the Assimilates of the Stem to the Durum Wheat Yield in the Conditions of Culture of the High Eastern Plains of Algeria

F. Bahlouli and H. Bouzerzour    

Abstract: The year effect is significant in semi-arid climate what explains the fluctuation of the conditions of one year growth to another. The yield grain is associated a great quantity of assimilates stored and transferred from the stems for the filling of the grains, the MBB genotype which has an important height of the stem transfers more assimilates. The present study was led on the experimental site of station ITGC of Setif. The objective is to determine the differences of duration and speed of filling and the contribution of the assimilates of the stems to the yield of 5 durum wheat genotypes (Triticum durum Desf.). The genotypes Ads497 and Deraa present sheets standard of great dimension. The beginning of the active phase of the filling of the grain corresponds to the beginning of the foliar senescence. MBB presents rhythm of dry out foliar slower, the speed of dry out stationary recorded by Ads497 is of -0.5957 cm2 day-1. The speed of filling of the grains is negatively related to the duration of filling. The participation of the assimilates coming from the stem is less and less that the medium allows the expression of a better yield in grain.

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