Scientific Papers Series B Horticulture

until the second one and the greatest valueswere recorded during the III rd age (table 3,figure 3).Table 3. The average of accumulated temperaturedegrees (°C) /day to the phenophases growth and themother plant development of Rosie de Aries, the averageon 3 years – SCDL IernutFigure 4. The°C average daily accumulated/phenophasesand ages to Rosie de Aries variety, the average on 3years – SCDL Iernut(ages), each of these characteristics were thesame variability in all eras: the weight of thebulb has great variability in all eras, shapeindex recorded medium variability in all agesand the height of the plant has small variabilityin all ages (table 4).Table 4. Variability indexes of the onion parent plant, theaverage (2007-2009), SCDL IernutI st II nd III rdPhenophaseage age ageMeanSowing-Emergence 5,64 7,46 17,1 10,06Emergence-Bulb formation 11,21 14,67 18,28 14,72Bulb formation-Matureconsumer14,19 16,93 21,03 17,38Mature consumer-Harvesting21,5 19,73 20,21 20,48Vegetation period 11,68 15,46 19,83 15,66Variability indexes VariaCharacteristicx med s 2 s s % k bilityI st ageThe weight of the54-64,2 104,0410,2 25 Highbulb (g)74,4Form indexes 0,88 0,014 0,12 18,5 0,76-1,00 MediumHeight of parentplant (cm)The weight of thebulb (g)56,8 7,84 2,8 8,4II nd age54-59,652,46345,96 18,6 30,08 33,8-71SmallHighForm indexes 0,78 0,02 0,14 10,0 0,6-0,9 MediumHeight of parent56,12 11,62 3,4112,65 52,7- Smallplant (cm)59,5The weight of thebulb (g)III rd age46 237,16 15,4 30,6 30,6-61,4HighForm indexes 0,62 0,01 0,12 17,4 0,50-0,74 MediumHeight of parentplant (cm)48,2 12,96 3,6 9,2 44,6-51,8SmallThe quantitative characteristics of onion bulbswere influenced by the temperature conditionsduring the growing season. There have beenvalue differences between ages, in particularconcerning the weight of bulb, bulb size(longitudinal diameter – ØL, transversaldiameter – ØTr), and form index-IF.In the I st age (table 4), the bulbs of the parentplant have been characterized through: theaverage weight of the bulb of 64.2 g, the indexform (IF) - 0.88 and the plant height-56.8 cm.In the II nd age (table 4), the bulbs of the parentplant have been characterized through: theaverage weight of 52,46 g, index form (IF) –0.78 and the height of the plant – 56,12 cm.In the III rd age (table 4), the bulbs of the parentplant have been characterized through: theaverage weight of the bulb-46 g, the index form(IF) - 0.62, the height of the plant – 48.2 cm.Although the features: average weight of thebulb, the bulb-shaped index and the height ofthe plant have different values in different eras171CONCLUSIONSDuring the phenophases - “sowing-emergence”and “emergence-bulb formation”-decreased thenumber of days since the I st epoch to the III rdage.The phenophases - 'the beginning of the bulbformation-the maturity consumption' and 'thematurity consumption-harvesting' have almostthe same period of days for all three ages.The longest vegetative period was recorded inthe Ist age and the shortest in the III rd age.The average weight of the bulb decreases fromthe I st age to the III rd age, but records highvariability in all ages.The shape index tends to be almost unitary tothe I st age dropping to the III rd age, recordingmiddle variability to all ages.The leaves’ rosette of the plants recorded thelargest height to the I st age and dropping downuntil the III rd age.