Efect of Various Irigation Treatments on Qualitative and Quantitative Characteristics of Swet Corn

Water deficit and dwindling water resources are the most important factors that limit agricultural products in the world and Iran. To study the efect of deficit irigation by method of furow irigation on yield and yield components of swet corn, an investigation is conducted in a randomized complete block design in 4 treatments with four replications, in Research Farm of the Faculty of Agriculture of Birjand, including: 1- an alternative furow irigation (AFI) 2- a fixed furow irigation (FI) 3- double furow irigation in 14 days (DFI) 4- a critcal furow irigation of al tracks treatment control (CFI) time constant irigation to 7 days, depending on the irigation area was considered. The time for irigation is calculated from the infiltration equation of Kostiakov Lewis and other treatments of deficit irigation are planed on this basis. The results of variance analysis show that the efects of irigation treatments were significant at the level of 1% upon the biologic yield, the number of leaf, dry weight of leaf, dry weight of stem, shrub height, stem height, the amount of protein in stem, leaf and grain. However, it was not significant upon fat of leaf, stem and grain. Height of shrub and diameter of stem have respectively the highest and lowest impact on determining the yield among the components of biologic yield with corelation coeficient of (r=0.915), (r=0.906) and the number of leaf for (r=0.276). The alternative and fixed furow irigations have ben wel quantiatively selected as the apropriate irigation treatments with biologic eficiency of 1.5 and 1.6 kg/ha water consumption. The alternative and fixed furow irigation treatments have ben presented as the best solution for water saving in arid and semi-arid fields with 50% and 60% saving and 6.9% and 14.2% reduction in biologic yield.

Swet Corn, Alternative Furow Irigation (AFI), Water Consumption Eficiency, Biologic Yield.