Role of Gibberellins and Forage Mixture on Dry Matter Yield and Weeds Associated with Barseem Clover( Trifolium alexandrinum L) andBarley( Hordeum vulgare L)

N.F.Almubarak,; A.Y.Yousif,

	Role of Gibberellins and Forage Mixture on Dry Matter Yield and Weeds Associated with Barseem Clover( Trifolium alexandrinum L) andBarley( Hordeum vulgare L)
journal of al-qadisiyah for pure science(quarterly)
Article 1, Volume 12, Issue 2, 2012, Pages 64-72 PDF (0 K)
Authors
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Abstract
This agricultural experiment has been done in an experimental field belongs to college of agriculture University of Diyala during winter season 2009/2010 dated in 15/10/2010 to study the effects of Gibberellins and the forage combination (which is made of barseem Clover Var.maskawi and barley Var.Ibaa 99) in the yield of the dry matter and weeds which are companioned with barely and barseem clover. The split plot design with three replicates has been followed in this experiment. the main plots contain the two factors, the first mixture(by mixing ratio 75% barley +75% of barseem clover) and the second mixture( by mixing ratio 50%barley +100%barseem clover) while the secondary plots contained Gibberellins its concentration was (100 ppm) and without gibberellins, four mowing operations had been done during the growth period, the percentages ratio had been studied for the crops who are involving in the mixtures as same as the percentage ratio of the weeds plus the percentage ratio of the dry matter and the dry matter yield. The results had been analyzed by statistical system named SPSS. The significant differences had been tasted among the medians according to L.S.D test at 0.05 probability level. The results of the study showed competition happing to the groups which are containing a part of the forage mixture whenever we moving forward in the mowing operation . barseem clover did recorded in the second mixture 84.15% in the fourth mowing operation but the ratio of barley reduced to 11.67% because of the influence that comes from the second mixture. GA3 and the forage mixtures effects were remarkably obvious on the competition between the couple crops and the weeds, their ratio did not cross the influential densities, so the percentage ratio was between 2.94% to7.96%. as will as the results of the study showed an ejectives increase reached in the second mixture 4.76 ton/ha which is belong to the fourth mowing operation,GA3 influence was not active on the dry matter yield while the interaction of the second mixture and GA3 was obvious in the increasing of the dry matter yield which reached the following results 3.28/ 4.17/ 4.71/ 3,04 ton/ha for the fourth mowing operation. We conclude from this experiment that the second mixture which is made of (50% of barley plus 100% of barseem clover) and GA3 100ppm proved an increase in the dry matter yield for the barseem clover and barley mixtures.

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