اثرات طرق مختلف پخش سيلاب بر خصوصيات رويشي گياهان مرتعي شورپسند

Investigation on the Influences of flood-water irrigation on vegetative characteristics of range plants

The study was located in playa marginal area (35 Km South-West of Sabzevar city, Khorasan-lran). Influences of two methods of irrigation (Basin Irrigation Method as control plot with 36 m3/ha of fresh water and flood - water irrigation method with over 800m3/ha of saline flood-water) on plants vegetative characteristics (cover, yields, density, stablishment), were investigated. Results showed that, in basin irrigation method the plant cover percent was %3.9, stablishment percent was %3, density was 18 (shrub/ha), yields was 70 (kg/hg) and biomass was 78 (Kg/ha). But in flood water irrigation method, this plant factors increased about: %15, %70, 564 (shrub/ha), 533 (kg/ha) and 1064 (kgr/ha) in respectively. Thus for saline - sodic soil reclamation and rehabilitation in arid and semi arid climate, basin irrigation method because of less amount of water is not efficient but flood - warter irrigation method because of much amount of water is suitable for soil leaching and breter reclamation.