Scientific Papers Series B Horticulture

area of latitude 26.5 degree East and longitude44.3 degree North. The altitude is about 90 mabove the sea level.The plant material used in this study includedself-rooted cultivars “Abbé Fétel”, “Max RedBartlett”, “Conference”, “Beurré Bosc”,“Alexander Lucas”, “Clapp’s Favorite”.Spacing between rows was 4 m and in the row2 m, the trees being leaded as “Trident” leadingform. A randomized block design for eachcultivar in tree replications with three trees perplot was set-up.There were used two support systems, onenamely T 4- wire with galvanized wire (figure1) and the other with two wire and threebamboo tutors/tree (figure 2). Figure 1. T-4 wire support systemFigure 2. Two wire and three bamboo tutorsThe existing drip irrigation system on eachrows provides 2l/hour water. It consist ofcontinuous dripping line and individualdrippers every 0.5.m.The soil is typical brown-reddish with 40%clay content in the surface layer.The average annual temperature is 10.6C andannual sum of precipitation is 574.3 mm.Measurements were carried out at thebeginning of each season, early in the spring,with roulette and caliper and results wereexpressed in cm.The trunk thickness was measured at 50 cmabove ground and was used to calculate thetrunk cross sectional area. Also were measured:tree height, the total length and/or number ofvegetative shoots. Total shoots were measuredor counted and classified as vegetative shootsor flowering shoots. Some data were processedwith variance analysis and t-test was applied.RESULTS AND DISCUSSIONSTo assure stability of system in ground wasThe growing vigour of the trees cultivated inused classical anchorage system and on the rowhigh density system shows us that between theevery 10 meters, concrete espaliers werepear varieties have appeared differencesplaced.regarding the trunk thickness growth, the heightThe alleyways were cultivated with perennialsof trees and transversal cross section.and were mowed mechanical in the growingThe trunk is an important element whichseason. On tree row the soil was maintainedcharacterizes the tree vigour and it is analyzedclean of weed by hand and mechanicaland correlated with a series of other biometricalcultivation.process and indices (Comanescu et al., 2012).The analysis of tree height values among thevarieties showed that tree height was lowest in262