Property | Value |
Name | Changes in allelopathic potential of winter wheat (Triticum aestivum L.) Residues under Various Soil Moisture and Phosphorus Levels |
Description | Research article:- Agronomy Hamidi Reza1* and Mahmoodi Sholeh2 *1 Assistant Professor in Agronomy Department, College of Agriculture, Shiraz University, Shiraz, Iran. 2 Former Graduate Student in Agronomy Department, College of Agriculture, Shiraz University, Shiraz, Iran.
Abstract:- Field, greenhouse, and laboratory experiments were conducted to evaluate the effects of soil moisture and phosphorus levels on allelopathic potential of wheat residues, and to study the effect of wheat extract concentrations on the germination and growth of radish (Raphanus sativus L.) and wild barley (Hordeum spontaneum Koch). The field experimental design was split-plot with 4 replications. The main factor was three moisture levels including 100, 200, and 300 mm crop evapotranspiration and the sub factor was five phosphorus fertilizer levels of 0, 50, 100, 150, and 200 kg/ha. The results showed that under soil moisture and phosphorous stresses, the inhibitory effects of wheat residues on radish and wild barley seed germination and growth parameters had an obvious increase. The weed seed germination peaked (62%) at extract that prepared from plants that received 100 kg P/ha (F3) and the highest amount of water (W1). A significant decrease in both plant seed germination percentage was recorded with increasing extract concentration. At all soil moisture levels the severe reduction of the weed shoot dry weight was obtained from no fertilized plots indicated the wheat plant produced the highest amounts of allelochemicals. The extract that was made from wheat plant which received the lowest amounts of moisture markedly inhibited radish and wild barley plant heights in a concentration-dependent manner. In all soil moisture levels, wheat plants that received 200 kg P/ha produced leachates that exerted the lowest inhibitory effects on wild barley plant height. It is an important strategy that the allelopathy of wheat straw can used for weed suppression in agroecosystems.
Key words:- Allelochemicals, Allelopathy, Soil moisture, Phosphorus, Wheat residue, Weed control. |
Filename | Hamidi R and Mahmoodi SH(15-21).pdf |
Filesize | 268.57 kB |
Filetype | pdf (Mime Type: application/pdf) |
Creator | admin |
Created On: | 11/04/2012 00:00 |
Viewers | Everybody |
Maintained by | Editor |
Hits | 3000 Hits |
Last updated on | 11/27/2012 02:09 |
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