كليدواژه :
مديريت تلفيقي علف هاي هرز , سيب زميني، , سيستم شخم , سود خالص
چكيده لاتين :
Integrated weed management with the purpose of enhancing input efficiency has recently gained a lot of attention among weed scientists. An experiment was conducted to evaluate the effects of integrated weed management on economic return of potato crop. The experimental design was a randomized complete block one with strip split-plot arrangement of three replications. Factors included, two tillage systems (conservation and conventional) and 8 weed management practices (herbicide, hand hoeing, cultivator, herbicide plus hand hoeing, herbicide plus cultivator, hand hoeing plus cultivator, reduced herbicide use plus hand hoeing, reduced herbicide use plus cultivator). Results indicated that total shoot biomass and leaf area index of potato (in all treatments that included cultivator operation) was less in conservational mode of tillage than in conventional tillage. Weed density and total biomass (in treatments with cultivator practiced in the 6th week), in comparison with other treatments were higher throughout until the end of season. The highest yield and gross return was earned from cultivator included treatments, but the highest net profit was recorded in integrated treatments, because in cultivator included treatments, 20% of potato tubers were damaged by nutsedge rhizomes. In general, in integrated treatments, where cultivator played a part, the effect on, economic return was more desirably pronounced.
