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Information Journal Paper

Title

Morphological and Physiological Response of gladiolus (Gladiolus grandiflora) to the Application of humic acid and amino acid

Pages

  125-137

Abstract

 Background and Objectives: Proper fertilization has an important effect on the production of ornamental plants. The present study was carried out in order to investigate the effect of humic acid and amino acid on improving the growth and reproductive characteristics of gladiolus. Materials and Methods: The experiment was conducted as factorial in completely randomized design with two factors of humic acid (0, 0. 25 and 0. 5 g. L-1 ) and amino acid (0, 0. 05 and 0. 1 g. L-1 ). The number of cormlets, root length, stem diameter, stem height, number of leaves and florets, flowering time, flower life, Chlorophyll, carotenoid, Anthocyanin and the content of nitrogen, phosphorus, potassium and calcium elements in leaf were investigated. Results: The highest stem height and the shortest flowering time were observed in humic acid 0. 25 g. L-1+ amino acid 0. 05 g. L-1. The highest number of cormlets, the highest leaf calcium concentration and Chlorophyll content in humic 0. 25 g. L-1 + amino acid 0. 1 g L-1 were obtained. The maximum root length (15 cm) and the carotenoid content related to humic content were 0. 5 g. L-1+ amino acid 0. 1 g. L-1. The highest number of florets was found in humic 0. 5 g L-1 + amino acid 0. 05 g L-1. The highest amount of Anthocyanin and the highest percentage of leaf phosphorus were recorded in humic acid 0. 5 g. L-1+ amino acid 0. 05 g. L-1. The highest percentage of nitrogen and potassium was obtained in humic 0. 25 g L-1+ amino acid 0. 1 g. L-1. Conclusion: The use of humic acid and amino acid improved the vegetative and reproductive characteristics of gladiolus

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