بررسي اثرات سطوح آبياري بر خصوصيات كمي و كيفي ارقام آفتابگردان

A Survey of the Effect of Different Levels of Irrigation on the Qualitative and Quantitative Features In Varieties of Sunflower

The effects of different levels of irrigation on the quantitative and qualitative features of sunflower varieties during the years 1380 and 1382 were studied in "The Agricultural Research Station of Khoy". The test was laid down as a split plot design completely randomized blocks with four replications. Irrigation, as the major factor was carried out at three levels, after 60, 90, and 120 mm of evaporation from Class A Pan and the varieties of sunflower (Record, Golshid, and Armavireski) were accounted on as the secondary factor. Comparison between the average data on these qualities revealed that after 60 and 90 mm of evaporation, the two levels of irrigation produced the utmost seed and oil. However to use water economically, it is recommended to have irrigation after 90 mm. of evaporation together with seed-oil function to yield 3792.2 and 1613.4 kg per hectare respectively. Also it was revealed that the maximum number of seeds in each tray belonged to the treatment of irrigation after 90 mm of evaporation and the highest weight of one hundred seeds resulted from irrigation after 60 mm of evaporation. All these- thatʹs, the number of seeds in a tray and seed-oil function as well as harvest index were attributed to Record type. The mutual effects of irrigation as well as the kind of seeds on qualities such as the weight of 100 seeds, and seed number in a plate as well as the oil function were meaningful at a level of %5 probability. The overall results in two years of research showed that by using proper agricultural practices (for instance, timing irrigation intervals) and selection of refined race sunflower seeds can lead to a proper and suitable harvest.