Morphophysiological Response of Gynura aurantiaca to Application of Humic Acid and Vermicompost
Subject Areas : Journal of Ornamental PlantsLili Fatehnezhad 1 , Abolfazl Jowkar 2
1 - Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran
2 - Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, Iran
Keywords: Antioxidant enzyme activity, Biofertilizer, Chlorophyll content, Sustainable agriculture,
Abstract :
This study investigated the effect of humic acid and vermicompost as natural soil fertilizers on morphophysiological characteristics in Gynura aurantiaca. To determine the effect of these substances at different doses on the growth and antioxidant enzyme activity of Gynura, vermicompst (0, 2, 4 and 6%) and humic acid (0, 0.25, 0.5 and 1 g/kg) were applied at soil applications. Morphological characteristics of G.aurantiaca including stem length, leaf area, stem diameter, leaf diameter, the weight of fresh and dry roots and shoots and its physiological and biochemical characteristics including the content of chlorophyll a, b and total, soluble solids, and antioxidant enzymes activity were studied. The experiment was conducted as a factorial experiment based on completely randomized design with three replications in the research greenhouse of Shiraz University in 2019. Treated plants with 0.5 g/kg humic acid in combination with 6% vermicompost increased the root dry weight. 1 g/kg humic acid in co-application with 6% vermicompost enhanced leaf area, stem diameter, leaf diameter, plant height, root fresh weight, shoot fresh weight and shoot dry weight as well as the antioxidant enzymes activity of POD and CAT. The improved chlorophyll a, b and total contents were observed in plants treated with 0.5 g/kg humic acid in combination 4 % vermicompost. These results indicate that co application of humic acid and vermicompost is a useful fertilizer to improve growth in Gynura plants.
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