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Abstract
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In order to investigating the effect of humic acid, Iron chelate، nano-iron chelate on photosynthetic pigmentation of tomato seedlings In the experiment, a randomized complete block design with three replications in order to test the variety and fertilizer was used. Treatments include 8-compound fertilizer The two levels of humic acid (0,0/15 grams per liter) iron(0,0/3 grams per liter) and، nano-iron chelated(0,0/2 grams per liter) with two varieties of tomato. The results obtained showed that the application of a combination humic acid fertilizer and iron nano chelated significant effect on the amount of chlorophyll a and b and the greenness index.
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