Effects of girdling and Pro-Ca applications on some plant characteristics in Cherry Laurel

This study was carried out to determine the effects of girdling and Pro-Ca (prohexadione-calcium) application on canopy height, canopy width, shoot length, trunk diameter, leaf top temperature, leaf bottom temperature and amount of chlorophyll in leaf in cherry laurel (Prunus laurocerasus L.), in 2015 and 2016 years. In the study, cherry laurel genotypes in Application and Research Area of University of Ordu were used as a material. 500 ppm Pro-Ca was sprayed by means completely wet the canopy of trees in both 15 May and 20 July. Girdling application was made using plastic clamp the trunk of trees on 7 May. Measures in the implemented trees were made at 15 days interval during vegetation. The result of study, canopy height was determined between 244 cm (Pro-Ca and girdling applications) and 245 cm (Control). Canopy width was determined between 163 cm (Control) and 177 cm (Pro-Ca application). While the highest trunk diameter was measured as 60.40 mm in Pro-Ca application, the lowest was measured as 51.19 mm in control application. The highest shoot length was determined in girdling application (51.49 cm), the lowest was determined in Pro-Ca application (47.90 cm). Leaf top temperature measured between 22.91 oC (Pro-Ca application) and 24.51 oC (Control). Leaf bottom temperature measured between 22.53 oC (Pro-Ca application) and 24.02 oC (Control). While the highest amount of chlorophyll in leaf was measured as 98.88 in Pro-Ca application, the lowest was measured as 92.15 mm in girdling application. As a conclusion, Pro-Ca application was determined to be better effective on the vegetative growth in cherry laurel