Journal of Food, Agriculture and Environment

Allelopathic effects of Chenopodium album, Amaranthus retroflexus and Cynodon dactylon on germination and growth of safflower

Author(s):

F. Rezaie, M. Yarnia ^*

Recieved Date: 2008-09-08, Accepted Date: 2009-03-21

Abstract:

According to the importance and diversity of Chenopodium album, Cynodon dactylon and Amaranthus retroflexus in safflower fields and significant role of safflower (Carthamus tinctorius L.) as an oil seed, an experiment was conducted using CRD based factorial design with three replications to study the allelopathic effects of root and shoot extracts of these weeds on germination and early growth stages of safflower in 2006. Analysis of variance at germination stage showed that main and interaction effects on germination %, seedling length, dry weight, coefficient of germination rate and germination time were significant. Root and shoot extracts of Amaranthus retroflexus, shoot extract of Chenopodium album and root extract of Cynodon dactylon inhibited germination entirely. The extract of the rest of weed decreased at least 52.5% seedling dry weight and near 80% germination percentage. In greenhouse experiment the effect of weed type on height, root and shoot dry weight, leaf area and biomass was significant. Different parts of weeds showed highly significant effect on all attributes. Interaction effects of weed type x weed part had significant impact on root dry weight, leaf area and biomass. Chenopodium album had the most impact on decreasing root and shoot dry weight, root length and biomass. Amaranthus retroflexus also caused high reduction of safflower height and leaf area. Weed extracts significantly decreased plant height at least 19.07% and root dry weight as highest 92.5% in compare with control. This research clearly showed that the weeds disturbed the safflower germination and growth by producing allelopathic compounds and caused reduction in crop establishment.

Keywords:

Allelopathy, germination, growth, Chenopodium album, Amaranthus retroflexus, Cynodon dactylon, Carthamus tinctorius L.

---

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 516-521

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :