در شمال خوزستان )OLEA EURO PAEA( مطالعه باروري و تعيين گرده دهنده مناسب براي زيتون محلي در دزفول

Study of Fertility and Determination of Suitable Pollinator For `Dezfulʹ Olive (Olea europaea L., Oleaceae Hoffsgg. & Link) Cultivar in North of Khouzestan

To determine the suitable pollinator for olive, cv. `Dezfulʹ among Manzanilla, Sevilana, Kalaman, local Gorgan 2 and local Gorgan 3 cultivars, this study was accomplished in Safiabad Agricultural Research Center for 2 years. The experimental design was Randomized Complete Blocks with four replications. Cross pollination were carried out on four `Dezfulʹ cv. trees having the same situation and, the fruit set was measured at stone hardening period. The results showed that the kind of pollen affected `Dezfulʹ cultivar fruit set and cross pollination could increase fruit set significantly (p<0.01). Comparison of fruit set means in different treatments showed that 21.49 and 31.23 percent of `Dezfulʹ pistils pollinated by pollens of `local Gorgan 2ʹ and `local Grgan 3ʹ cultivars in first and second examined years were fertilized respectivily, while only 7.78 and 9.02 percent of self pollinated `Dezfulʹ pistils were fertilized, therefore, apparently self incompatibility exists in `Dezfulʹ olive. Analysis of combined two years showed that the annual effect on fruit set in `Dezfulʹ was not significant. The effect of pollination on oil content of fruit was not significant in different treatments, varying between 51.3 and 54 percent in dry matter. Study of flowers in `Dezfulʹ cultivar showed that the ratio of perfect and imperfect flowers from year to year was not the same and about 20 -34 percent of flowers were perfect. Fruit set of all flowers with open pollination was 3.04 - 3.4 percent.