Abstract
apot experiment was conducted in a lath house during the season of 2012 / 2013 on Black seed plant in university of Tikrit as Acompletrandomized design exeperiment to study the physiological effect of liquid organic fertilize (Lighumus 18) and plant growth regulators IAA and GA3on some physiological effect of Black seed. Lig humus 18 used in three levels(H0:Contol:H1:spray with liqhumus 18 by 1.5ml/2L Water:H2 addition liqhumus to the soil directly by1.5ml/2L Water .Treatment with plant growth regulartors were(G0:Control:G1 spray with IAA 150 mg/L:G2 spray with GA3 :G3 spray with mixture of IAA+GA3.The results Showed superior the treatment of addition of organic fertilizer with mixture of( IAA and GA3) on giving higher total chlorophyll content by (10.20)mg/gm dry weight, plant hight reach (72.43)cm, dry weight of leaves, shoots and root reach (6.90,19.40 and11.40)gm/plant. Yhe same treatment superior on giving higher seed/plant reach (4.40)gm and higher volatile and fixed oil percentage reached (0.40% and24.87%).
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