Document Type : Original Article
Authors
1 Department of Biology, College of Education For women Tikrit University, Iraq
2 Department of horticulture and landscape, College of Agriculture, Tikrit University, Iraq
Abstract
A field experiment was conducted on cress plants grown in plots with 1*2 m dimensions, during the year2021. It was factorial experiment with two factors. The first was with and without spraying humic acid (H1 spraying 4 ml L¯¹, H0 without spraying). The second factor was spraying sea Algae extract (E1 spraying with 2 ml .L¯¹ of Kelpak, E2 spraying with 2 ml .L¯¹ of UltraKelp40 , E3 spraying with a mixture of 2+2 ml .L¯¹ of Kelpak and ultraKelp40) as well as without spraying the extract. The experiment was designed with RCBD. The treatments were replicated 4 times and Duncun’s multiple range test at p=5% was used. Humic acid, sea algae extracts and their interactions causes significant effects on the plants. These treatments increased all vegetative growth characteristics compared to control treatment. The spraying also caused significant increases in macro nutrient (N, P, K) and micro nutrient concentrations (Fe, Cu, Zn). The treatmen .L-¹ humic acid and mixture of 2+2 ml .L¯¹ of Kelpak and ultrakelp40 extracts (H1E3) gave highest concentration of N (2.25%) phosphorus (0.375%) potassium (2.95%) Fe (109.8 mg. kg¯¹) Cu (18.60 mg. kg¯¹) and Zn (18.80 mg. kg¯¹). The lowest of these parameters were 1.75%, 0.290%, 1.85%,
, 75.10 mg. kg¯¹, 12.60 mg. kg¯¹, 13.50 mg. kg¯¹) in the treatment of control ( not sprayed plants). Spraying humic acid, sea algae extracts and their interactions also caused significant increases in all physiological characteristics. Volatile oil was increased in sprayed plants specially H1E3 compared to plants in control treatments.) This treatment recorded the highest values of specific gravity of volatile oil (0.856 mg. 100 g¯¹ fresh matter). Highest refractive Index of volatile oil (1.516), highest oil quantity (0.199 mg. g¯¹) were also increased. The lowest of these parameters were in control treatment.
Keywords
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