Study on the Effect of Orchard Grass (Dactylis glomerata L.) Allelopathy on Germination and Seedling Growth of Alfalfa (Medicago sativa L.)

پژوهش های حفاظت گیاهان ایران

Article 13, Volume 28, Issue 4 - Serial Number 26, December 2015, Pages 532-538   

Document Type: Research Article

DOI: 10.22067/jpp.v28i4.22542

Authors

Mohammad Sedghi^{* 1}; S. Gholi Toluie²; Mohammad Rezaei¹

¹University of Mohaghegh Ardabili

²University of Tabriz

Abstract

In order to identification of allelopathic compounds and investigation of the effect of aerial part extract of orchard grass on germination and seedling growth of alfalfa an experiment conducted as completely randomized design with four replications at University of Mohaghegh Ardabili, Iran. Treatments were concentrations of orchard grass extracts including 0, 25, 50, 75, and 100%. Radicle and plumule length, fresh weight of seedling, percentage and rate of germination were measured. Results showed that with increasing extract concentration there was a reduction trend in all studied traits (except of seedling fresh weight and plumule length which increased at lower concentrations and then declined). The highest content of allelopathic substances related to phenolic compounds (7.98 and 13.91 mg in root and shoot, respectively). Plumule length and seedling fresh weight increased at the concentrations between 23 to 26% and after then reduced sharply and prevented completely at 100% concentration. All the traits reached to zero at 100% concentration. Orchard grass allelopathic substances inhibited the germination and growth of alfalfa seeds at higher concentrations.

Keywords

Allelopathy; extract; Germination; Weed

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