The effect of foliar application of nutrient solution (Unigreen) on the growth and yield of two cultivars of Kohlrabi (Brassica oleracea var. caulorapa L.) .

Abstract

This research was conducted in a private field (30)Km at Najaf- Karbala Governorates during the growing season of 2006 in autumn to study ( the effect of spraying nutrient solution (Unigreen) on the growth and yield of two cultivars of Kohlrabi (Brassica oleracea var. caulorapa L.) "Holland White vienna and the local cultivars".The research included 6 treatments which were an interaction between three concentrations of the nutrient solution (Unigreen) ( 0, 1.5, 2.5)cm3./ L on the vegetative growth of two cultivar of Kohlrabi.The research was designed in a split–plot experiment within Randomized Complete Block Design (R. C. B. D.) with three replications. Least Significant Differences Test (L.S.D.) was used to compare means at 0.05 probability level . Plants were sprayed three times during the growth season starting from (2-3) real leaves with 10 days interval of time. Results can be summarized as follows : -1-The local cultivar C2 gave a significant effects on the following characteristics'(the total number of leaves (leaf / plant) and the leaf width (cm / plant) of the foreign cultivar C1 during autumn plantings. The interaction between the two cultivars and the spraying of nutrient solution affected significantly most studied characteristics' of (the total number of leaves (leaf / plant) and the leaf width (cm / plant) during growth seasons where the interaction treatment C2S2 gave the highest means of characteristics' "the total number of leaves (leaf / plant), the leaf width (cm / plant) which reached (23.00) leaf / plant, (17.96) cm / plant. in autumn seasons respectively.2-The results showed that the local cultivar C2 was superior on the foreign cultivar C1 in all of components the characteristics' of the total yield and its components in autumn season. The concentrations of the nutrient solution showed a significant effect on all characteristics' of the total yield and its components with the control treatment. There was a significant increase due to the interaction between the nutrient solution and the cultivar on the yield and its components, where C2S2 gave the highest characteristics' (the bulbous stems mean weight / g, the bulbous stems mean radius / cm. and the total yield, (ton / ha) giving (389.33) g, (8.60) cm, (5711.80) Kg / ha.3-The results showed that, the Local cultivar C2 significantly affected the characteristic of the total soluble solids (T.S.S) for bulbous stems compared to the foreign cultivar C1 during autumn season. The results of spraying the vegetative growth of the plants significantly affected the characteristics' of the total soluble solids (T.S.S) for bulbous stems compared with the control treatment in growing seasons. The interaction between the cultivar and the nutrient solution were significant where C2S2 gave the highest means of total soluble solids (T.S.S) for bulbous stems, (7.30)% .