Effect of foliar application with calcium nitrate on quality of sanguine orange

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In the most of southern and northern of the country cultivation citrus yield is relatively low per unit area. In order to increase production two different methods can be used: the first one is to expand the area under cultivation and the second one is increasing the yield unit per area. It is very difficult to expand the area under cultivation in the country according to the problems related to the water limitation and beneficial facilities. Therefore the fundamental solution to increase the production is to increase the yield unit per area. Therefore, an experiment in a randomized complete block design with 5 treatments was conducted to gain some qualitative and quantitative characters of fruit. Treatments were sprayed on Leaves with calcium nitrate concentrations (2.5 and 5) in 1000 with a single spraying and double spraying treatment. The results showed that treatment of the tree with calcium treatments on tree increases Ph, fruit density, and the total acidity. Calcium treatment because of the increased thickness of the peel was more effective than other treatments in maintaining fruit quality. The findings shown that calcium is effective on maintaining the fruit quality. It absorbed with double valance and also calcium is the most static matter above the other essential matters and its definitely is usually observed in fruits. Therefore calcium nitrate application for its fast absorbent can effects on this matter.

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