EFFECT OF HUMIC ACID AND SEAWEEDS EXTRACTS ON GROWTH, YIELD AND NUTRIENT CONTENT OF GARLIC (Allium sativum L.)
Abstract
This study was done in the winter growing season of 2016 in the college of Agriculture\ University of Dohuk\Kurdistan region .Iraq, to determine the effects of humic acid with four concentrations (0, 0.5, 1, 1.5 g.L-1) and seaweeds extract (Alga 600) with two concentrations (0 and 8 ml.L-1) on Garlic (Allium sativum L.) cv. Chinese. Results indicated that spraying of humic acid(1.5 g.L-1) significantly increase vegetative growth characteristic which regarded on leaves number.plant-1 (6) stem diameter (5.6 mm) and chlorophyll content (69.78 SPAD) were significantly increased as compared with untreated plant (65.5 cm, 4.55leave.Plant-1, 3.83 cm and (57.28 SPAD). The same concentration also showed significant effect on yield and bulb quality and recorded the highest value of (cloves weight (4.9 g) cloves number.bulb-1 (97.67) ,bulbs weight (28.47 g) and bulbs length (4,28 cm),cloves length (2.72 cm) and cloves diameter (2.67 cm) compared with untreated plants, also humic acid showed significantly increase in nutrient percentage (N,P and A) in bulbs of garlic. In the other hand, seaweed extracts also showed significant effect of all studied characteristic , since spraying of seaweed extracts at (8 m.L-1) recorded the highest value of (vegetative growth characteristic, yield and quality characteristic as compared with untreated plants. For the interaction, results showed that the interaction of (1.5 g.L-1) of humic acid with (8 ml.L-1) of seaweed extracts recorded the highest values of the vegetative growth, yield and nutrient content.
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References
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