The effect of flood spreading on the amount of cover, density and production of tree and rangeland species in Bam Abbarik flood spreading station

The effects of flood spreading according to soil type and climate on vegetation cover of tree and rangeland species show different changes. The aim of this study was to investigate the periodic changes of vegetation including fruitful and non-fruitful cultivated trees and rangeland species in the Bam Abbarik flood spreading station. In this study, in order to perform forest studies, first the operation of locating the plots, selecting and marking the bases and preparing the certificate was carried out and rectangular parts of 350 square meters with random - systematic distribution were used. Also, in rangeland studies, 1×1 plots were used to measure canopy coved percentage and density and were recorded in the relevant tables. For measuring dry forage production, cut-off and weighing method were used. The results showed that Eucalyptus bases in this aquifer with density of 531 bases in hectare have an average height of 3.62 m and trunk diameter mean at collar site of 18 cm and the crown diameter average 3.6 m. In the study of rangeland cover, the effect of vegetative type, vegetative form, and interaction between vegetative type and vegetative form on crown was significant. Also, the effect of vegetative form, interaction of vegetative type in channel, channel interaction in vegetative form and vegetative form and channel interaction in this experiment were significant on plant density.