Weed mapping of pomegranate and pistachio gardens by using Geographic Information System (GIS) in Meybod and Ardekan counties

In order to identify the population index and weed mapping in Ardekan and Meybod pomegranate and pistachio gardens in Yazd province, by using of Geographic information system (GIS), 120 gardens were sampled. (30 pistachio garden and 30 pomegranate in Meybod and 30 pistachio and 30 pomegranate garden in Ardekan) in 2011. In each garden longitude, latitude and altitude were recorded by means of GPS. Recorded data made weed maps in the GIS. Weed flour contains 55 species from 22 families that 29 and 40 species were in pomegranate gardens of Ardekan and Meybod respectively, and 36 and 39 species were in pistachio gardens of Meybod and Ardekan respectively. The most important families of weed in pistachio and pomegranate gardens were Poacea, Asteraceae and Fabaceae. Shannon-Viener Index was used In order to comparison of gardens species diversity and uniformity. Results showed high weeds uniformity in two counties because of same weather, climate and gardeners management methods. From Abundance Index (AI) point of view, Broadleaf weeds includes, field bindweed (Convolvulus arvensis L.), common lambsquarters (Chenopodium album L.), Russian knapweed (Acroptilon repens (L.) DC.), camelthorn (Alhagi persarum Bioss. &Buhse.), and grass weeds include, giant green foxtail (Setaria viridis (L.) P.Beauv.), rigid rye grass (Lolium rigidum Gaud.), little seed canary grass (Phalaris minor Retz.), Bermuda grass (Cynodon dactylon (L.) pers.) were the most important and dominant species.