Role of Phosphorus in Citrus Production

Phosphorus is a component of nucleic acids and lipids and is important in metabolism, energy transfer, and photosynthate transport during citrus production.

Phosphate effect at growth stages

Stage Phosphate effect      
Flowering Maintain long-term productivity
Post Harvest Maintain long-term tree productivity
See more on Citrus Growth Stages.

General guidelines for Phosphate application

While not needed in large quantities, the correct balance of phosphorus to other nutrients is critical in citrus production. It is particularly important during early tree growth on new groves. In the long term, regular P applications will maintain the yield and fruit quality of mature citrus trees. Good availability is important during periods of active root growth e.g. springtime and in between vegetative flushes.

Phosphorus deficiencies in Citrus

Phosphorus deficiency is rarely seen on mature citrus trees, but when it is, it can reduce flowering, resulting in poorer production and small fruit with reduced juice content. Deficient leaves turn bronze and are smaller than normal. Older leaves die at the margins and tips. Branches are weak, flowering is reduced and fruit is spongy and soft before ripening.