Citric acid treatments on the vegetative, fruit properties and yield in Interdonat lemon and Valencia orange

摘要

The aim of the research is to apply two different doses (0.05 and 0.1%) of citric acid to the leaves of Valencia orange and Interdonat lemon, which are cultivated in regions with higher soil pH, in order to lessen / decrease the negative effects of higher pH values. The effects of these treatments on the vegetative and fruit properties and yield were investigated. As a result of the evaluations; 0.05% citric acid has increased leaf width from 5.89 to 5.95 cm for Interdonat lemon and from 4.26 to 4.30 cm for Valencia orange; leaf area respectively from 49.43 to 50.78 cm2?and from 27.04 to 27.99 cm2. Average fruit weights of Interdonat lemon and Valencia orange have reached higher amounts, in 0.05% citric acid treatment (139.3 g) and in 0.1% citric acid treatment (213.0 g), respectively. The amount of vitamin C in Interdonato lemon had higher amounts in 0.05% citric acid treatment (48.26 mg/100 g) and in 0.1% citric acid treatment (48.80 mg/100 g). For the amount of vitamin C, the value in Valencia orange (0.05%: 47.92 mg/100 g and 0.1%: 46.19 mg/100 g) was the same with Interdonat lemon. Compared to the control group (37.59%), the 0.1% citric acid treatment (38.47%) caused a rise in the ratio of lemon juice. Moreover, compared to the control group (43.22%), the 0.05% citric acid treatment (44.17%) and the 0.1% citric acid treatment (45.44%) has caused a gradual rise in the ratio of orange juice.