Effect Of Time And Place Of Girdling On Quality And Yield Of Grape And Raisin Of Vitis Vinifera Cv. Sefid Bidaneh In Takestan Region
2007
Mahmoodzadeh, H., Seed and Plant Improvement Section, Agriculture and Natural Resources Research Center of Qazvin Province
In order to study on the effect of times and places of girdling on quality and yield of grape and raisin, an experiment was conducted on non-grafted vines of Vitis vinifera cv. sefid bidaneh (6-year old) in Takestan region. Grapevines were treated by shoot, cane, trunk and arm girdling alone or a combination of them at flowering, berry growth (FB+3 week) and veraison (berry softening or color break) phonological stages. 13 treatment combinations of vine girdling were tested in vineyard on clay-loam soil at Takestan Grapevine Research Station. The effect of trunk, cane, arms or combination of these treatments were varied on increasing of yield/vine, cluster weight, cluster length, average weight of 100 berry and also after girdling TSS, TA, TSS/TA and pH content were different, significantly. All of treatments had effect on TSS, TA and TSS/TA and also on yields/plant. The combination of trunk or cane girdling at berry growth and veraison stages increased yield and quality of fruits than other treatments, significantly (p0.01). Results showed trunk and cane and arm girdling at berry growth stage caused inceasing berry weight and size, cluster weight and total yield.
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