Allelopathic Effects Of Eucalyptus Camaldulensis

Using allelochemicals as natural herbicides is a new approach in order to reduce undesirable effects of chemical herbicides on environment and prevention of weed resistance against herbicides. In order to this has been done a survey and allelopathic effects of leaf and root extract of Eucalyptus camaldulensis were investigated on Festuca ovina greenhouse in National Research Institute of Forests and Rangelands of Iran in 2009. This survey was done based on completely randomized design with three replications and means comparisons by Duncan's method at p < 0.05. The used treatments in greenhouse stage were: control, dried leaf powder (5, 10, 15gr), fresh leaf powder (5, 10, 20gr), ethanolic extract of leaf (3, 6, 12 grl-1), aqueous extract of dry leaf (5, 10, 15%), aqueous extract of fresh leaf (10, 20%) and root exudates. In some pots ethanolic extract of leaf (3, 6, 12 grl-1) sprayed on test plants leave. The measured parameters were plant length, germination percentage, germination speed, germination index, vigour index, fresh and dry weights of biomass, shoot and root, soluble sugar, enzyme activity of catalase and peroxidase, relative water content (RWC), leaf water content per unit leaf area (LWCA), specific leaf area (SLA), leaf area (LA), number and length of the leaf, number of tiller, number, length and width of stomata. The results of greenhouse phase showed that in all measured qualifications, the highest inhibitory effect was belonged to ethanolic extract, aqueous extract of dry and fresh leaf also had inhibitory effect and the measured parameters decreased. The used fresh and dried leaf powders act like a mulch layer and prevent water from exit. The effects of root exudates were investigated in pots that include annual plants of Eucalyptus that in this case root exudates also completely inhibit germination of seeds of Festuca ovina.

The columns in this dataset are:

• id:
• T: Treatments [B(Blank), FLP(Fresh Leaf Powder (5, 10, 20gr)), DLP(Dried Leaf Powder (5, 10, 15gr)), EEDL(Ethanolic Extract of Dry Leaf (3, 6, 12 grl-1)), SEEDL(Sprayed Ethanolic Extract of Dry Leaf (3, 6, 12 grl-1)), AEDL(Aqueous Extract of Dry Leaf (5, 10, 15%)) ,AEFL(Aqueous Extract of Fresh Leaf (10, 20%))]
• GP: Germination Percentage
• GI: Germination Index
• VI: Vigor Index
• PH: Plant Height
• GS: Germination Speed
• LA: Leaf Area
• SLA: Specific Leaf Area
• RWC: Relative Water Content
• LWCA: Leaf Water Content per unit Leaf Area
• BFW: Biomass Fresh Weights
• SFW: Shoot Fresh Weights
• RFW: Root Fresh Weights
• BDW: Biomass Dried Weights
• SDW: Shoot Dried Weights
• RDW: Root Dried Weights
• LL: Leaf Length
• SS: Soluble Sugar
• SNLL: Stomata Number on the Lower Surface of the Leaf
• SNUL: Stomata Number on the Upper Surface of the Leaf
• SLLL: Stomata Length on the Lower Surface of the Leaf
• SLUL: Stomata Length on the Upper Surface of the Leaf
• SWLL: Stomata Width on the Lower Surface of the Leaf
• SWUL: Stomata Width on the Upper Surface of the Leaf