بررسي برخي آثار آتريپلكس لنتي فورميس بر ويژگي هاي پوشش گياهي در محيطهاي تحت كشت

Assessing Some Atriplex lentiformis Effects on Vegetation Characteristics in Planted Lands

Range improvement through planting non-native and adapted species requires more studies on their several different aspects. Ecological positive or negative effects on new species must carefully be examined before allowing their plantation in vast areas. The aim of this research was to determine the ecological effects of Atriplex lentiformis species on vegetation cover and soil in two sites in Fars province. The research method was based on comparison between selected control plots and planted sites. Annual production (dry matter), canopy cover and density of Atriplex shrubs were measured. Plants were compared in terms of dry matter production per hectare as well as canopy cover percentage by F-test at 95% level within the two sites. Canopy cover percentage for I, II and III species class was compared between shrubs and control sites using F-Test. Abundance of species was compared by KS test. Results show that there was no significant difference between the two sites in terms of dry matter production and canopy cover percentage. Canopy cover percentage in planted areas was greater than the control area. In planted area, the number of class I and native species was more than control species. Statistical data of vegetation in Dadin Kazeroon regio except that in Dadin Kazeroon, there was no significant difference between canopy cover percentage of the control and planted areas. From the results obtained on both geographical regions, it can be concluded that Atriplex did not have a negative effect on vegetation, but increased the percentage of class I species in the planted areas.