Abstract
A field experiment was conducted in College ducation for Women / Tikrit University during 2017 – 2018 season to study the effect of two addition method sprying the plant and sprying the soil of organic fertilizer humic acid with four concentration ( 1ml/l,2ml/l,3ml/l,4ml/l in addition of control(without treartment) on the growth , yield and active ingredients of Allium sativum , The experiment was factorial according to split plot design, addition method take the main plots while the concentration take the secondary plots with three replication ,results showed sprying the soil with humic acid led to significant increase on vegetative growth and yield characteristics and high value gained by spring the soil with concentration 4ml/l on compar with plant spray treatment.Analysis by using HPLC teqnique appeared existence many active ingredients on the leaves and cloves of plant as: S-allyl cysteine, Y-glutomyl cysteine, Allicin, Vinyl-{4H}1.2dithlin (agoene), di-allyldisulfide and Diallyltrisulfide and higher percentage from allicin compound were at soil spray method with 3ml/l humic acid reacched 54.59%.
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