V. ROICHEV and A. VASSILEV
Agricultural University, BG-4000 Plovdiv, Bulgaria
ROICHEV, V. and A. VASSILEV, 2003. The effect of girdling on leaf gas exchange and potential bud crop indexes of table grapevine cultivars. Bulg. J. Agric. Sci., 9: 229–235
The effect of girdling on leaf gas exchange and potential bud crop indexes along the length of the fruit cane of table grapes cv. Bolgar (seeded) and Russalka, Sultanina and Corinthian White (seedless cultivars) was studied. It was found that girdling had an inhibiting effect on net photosynthesis velocity only in cv. Russalka, while its effect on transpiration intensity was comparatively low and insignificant. Girdling did not result in significant differences in either winter eye and primordial shoot size nor their dynamics. Applied at different times, it did not change significantly the potential bud crop coefficients and/or the percentage of fruitful or fruitless winter eyes. Girdling increased the number of winter eyes with 1 inflorescence and size of over 750 mm.