Document Type : Research Article
Authors
Faculty of Agriculture, Ferdowsi University of Mashhad
Abstract
Abstract
Wheat is one of the important crops planted worldwide and development of its root is important at the first growing stages. In order to evaluate effects of different levels of humic acid on root and shoot development of Teriticum aestivum, an experiment was conducted in 2008 at Research Greenhouse of Faculty of Agriculture, Ferdowsi University of Mashhad. A randomized completely block design with three replications was used with factorial combination of humic acid concentration (0, 100, 200, and 300 mg/l) and wheat cultivar (Sayons and Sabalan) in sand culture. Results showed that humic acid significantly increased root area to leaf area ratio and chlorophyll content. Sabalan showed better performance in many traits compared to Sayonz in 300 mg/l humic acid. The maximum leaf area and weight was recorded in Sabalan cultivar at 300 mg/l humic acid concentration while in Sayonz 200 mg/l humic acid concentration was more effective. Therefore humic acid performed as a root system strengthening organic fertilizer. That is important particularly in dry farming that is needed root development at the first growing stages.
Key words: Humic acid, Cultivar, Sayonz, Sabalan, Concentration
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