كليدواژه :
گلدهي زيتون , اسيدجيبرليك , باغباني , Gibberlic acid. , Alternate bearing, , Olive flowering. , phenology , فنولوژي
چكيده لاتين :
Indigenous olive trees we dominant type in Roudbar olivet of Guilan province. The Roudbarʹs variety is cultivated in new olivet of Iran. One of The important characteristic of this variety is an alternate bearing, which this phenomena in orcharding economic aspect could be undesirable., whereas flowering habit has more efftxts on alternate bearing & so considerable to study the effectiveness factors of lowering habits and alternate bearing of native olive trees. Therefore spraying by gibberlic Acid ir> form of random complete block design (RCBD) with 7 treats and 4 repetitions on selected branches of low productivity olive trees with 1.5 up to 2 meters long. Within periods of 2, 6, 10, 12, 18, 22 weeks after FB(Foo1 bloom) in 2000 (ofi year) in 2001(on year), ouring flowering, the number of flowers in inflorescence, complete flowers percent, diameter length and stone weight of sprayed branches counted. The results shown that spraying olive trees by gibbertic acid during different periods of the off year have different cfTeci on flowering characteristics and fruits as well(on year). Spraying in 18 and 22 weeks after FB time in off year didnot observed significant difference in number of flowers on infiorescence compare with control trees. Spraying about 2. 6. 10, 12 wycks after flowering caused significant increasing in the number of flowers in inflorescence. Spraying by gibberlic acid during low rainy year could less effect un complete flowering and spraying about (2,6, 10, weeks after flowering caused low significant on fruit set percent in compare with conlnil treea- Spraying about 2, 6, 10, 14 weeks after F.B time cause increasing and decreasing of fruits weight and pulp respectively. Spraying about 2, 6, 10 weeks after FB caused significant increasing in length and diameter in seeds in compare with control trees. Spraying has got significant effect on stone.
