Effect of spraying some mironutrints in some traits and green yield of hydroponic barley

الملخص EN

Two experiments were conducted in hydroponic device for the year of (2015 – 2016) in the farm of one of farmers at the Arab Gbour region - Dora - Baghdad, to study the effect of spraying micronutrients on green yield of hydroponic barley.

The C.R.D design was used with four replicates for the experiments, which included zinc spraying by three concentrates (125, 100, 75 mg.L-1), iron (100, 75, 50 mg.L-1) and calcium (600, 400, 200 mg.L-1), as well as the control treatment (without spraying) in first experiment.

The second experiment which included the blend of fertilizer by using highest concentration of Micronutrients obtained from the results of the first experiment were combinations of fertilizer is (Zn +Fe, Zn +Fe, Zn + Ca, Fe + Ca and Zn + Fe + Ca), as well as the control treatment (without spraying).

The results of the first experiment showed that treatments of (Zn3 , Fe3 and Ca3) gave the highest plant height of (26.80 cm , 27.60 cm and 24.90 cm) , highest Green yield reached (28.67 kg m-2 , 28.79 kg m-2 and 21.26 kg m-2), and highest dry yield reached (6.30 kg m-2 ,6.29kg m-2 and 5.12 kgm-2 ) respectively.

The results of second experiment showed that the combination of (Zn + Fe + Ca) gave the highest plant height reached 29.05 cm, green yield of (29.25 kg m-2) and dry yield of (5.32 kg m-2).

We conclude from this study that it is necessary to add the Micronutrients with high concentrations and to formation of a combination of these elements to give better results than spraying them individually to nourish the plant during its growth in the hydroponic chamber, therefore recommend adding elements of (Zn + Fe + Ca) with concentrations of (125 +100 + 600 mg L-1) to obtain a higher green yield of hydroponic barley