اثر غلظت هاي مختلف بروكلسيم روي خصوصيات كمي و كيفي گل رز رقم ايزي لاور

چكيده انگليسي :

Effect of Different Concentrations of Boron and Calcium on Quantitative and Qualitative Characteristics of Easy Lover Rose Flower Mahboubeh Shams mahboobe shams@yahoo com February 22 2010 Department of Horticultural Sciences Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language farsiNematollah Etemadi etemadin@cc iut ac irBahram Baninasab bbanin@cc iut ac irAbstractToday business of cut flower and ornamental plants production is of major importance in the industrial world Rose Rosa hybrida L makes up about 33 of the total cut flower production throughout the world Rose isone of the most important ornamental crops in Iran that is widely cultivated in soilless culture The growth andquality of roses is greatly influenced by nutrient management Hence it is essential to have knowledge of theplant s mineral requirements in order to ensure a good yield and to avoid nutrient wastage Calcium Ca is anessential macronutrient element for normal plant development which participates in numerous physiologicaland biosynthesis processes Calcium is involved in cellular growth and differentiation cell wall formation enzymatic activity and membrane permeability Boron B is an essential element for plant growth and isessential to effective fulfillment of the function of Ca in the root environment However good fertilizermanagement for greenhouse crops must take into consideration the crop requirements Thus the aim of thisstudy was to investigate the effect of B and Ca concentrations and their interaction on quantity and quality of cutrose In this experiment Easy Lover cultivar of rose grafted on the rootstock Rosa canina was used The plantshad been grown in a greenhouse The roses were planted in pots containing a mixture of cocopeat and perlite 1 1 v v and subjected to nine nutrient solutions for 7 months A 3 3 factorial experiment was arranged in arandomized complete block design with four replications and two plants per replication Treatments wereconsisted three levels of B 25 50 and 75 M and three levels of Ca 2 5 5 and 7 5 mM During theexperiment the number of harvested flowers length and diameter of stem flower and peduncle were assessed In addition to determine Ca and B concentration petals and fully developed leaves of plant were separatelysampled from different treatments At the end of the experiment the number length diameter area fresh anddry weight of the roots were determined Results showed that B and Ca levels affected root development Boronconcentrations resulting in thickness elongation and more branches of the root system Results also found thatthe roots of the plants supplied with high Ca concentrations were superior to those supplied with low Caconcentrations Interaction of B and Ca concentration on root number length and diameter were significant Byincreasing B and Ca concentration in nutrition solution length and diameter of flowering stem increased Regardless of the B concentration the Ca treatment significantly affected number of flowering stem However highest level of Ca was less effective than other concentrations A significantly interaction between B and Caconcentration was observed for number of flowering stem Flower length and diameter and pedicle diameterwere not affected by treatments Increasing B concentration in nutrient solution increased B and Caconcentration in both leaf and petal Increasing Ca concentration in nutrient solution increased Ca concentrationin both leaf and petal The Ca application had an antagonistic effect on concentration of B in both leaf and petal In conclusion the results demonstrated that B and Ca were successful in increasing length and diameter of stemand improving root development of Easy Lover cut rose grown on a soilless culture Boron application had asynergistic effect on uptake of Ca and Ca had an antagonistic effect on uptake of B concentration in leaf andpetal Key words Rose Easy Lover Boron and Calcium

شمس، محبوبه

اثر غلظت هاي مختلف بروكلسيم روي خصوصيات كمي و كيفي گل رز رقم ايزي لاور