Document Type : Original Article
Authors
1 M.Sc. Graduated in Agrotechnology of Plant Production and Genetic Department, Shirvan Faculty of Agriculture, University of Bojnord, Bojnord, Iran.
2 Professor, Faculty Member of Plant Production and Genetic Department, Shirvan Faculty of Agriculture, University of Bojnord, Bojnord, Iran
3 Ph.D. Student in Crop Physiology, Department of Agrotechnology, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran.
Abstract
This research was conducted in order to investigate the effect of aqueous extract of different organs of Artemisia aucheri on the growth and germination traits of Brassica napus and Goldbachia laevigata in two separate experiments including the laboratory and the greenhouse conditions, respectively. The experiments were exerted based on a completely randomized design with three replications and randomized complete block design with four replications, respectively. The test treatments included aqueous extracts of Artemisia in concentrations of 5, 10 and 15% of roots, 5, 10 and 15% of aerial organs and control (distilled water). The results showed that with increasing extract concentration, the germination and growth traits and total chlorophyll of both investigated plants significantly decreased. In such a way that the highest and lowest inhibition rates were associated with 15% root extract and 5% aerial organs extract, respectively. The level of 15% Artemisia root extract in Brassica decreased the germination percentage by 37.1% and in Goldbachia by 48.5% compared to the control. Increasing of extract concentration from zero to 15% of arial parts decreased stem length decreased by 30.3% in Brassica and 56.3% in Goldbachia compared to the control. Most of the examined traits in Goldbachia weed, were more sensitive to the allelopathic effects of Artemisia extract compared to Brassica. in general, root extract of Artemisia were more capable of dealing with germination and seedling growth than the aerial organs. Therefore, 15% aqueous extract of Artemisia root can be suggested to reduce the growth and weakening of the weed Goldbachia.
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