Articles - SQM - Specialty Plant Nutrition

Get to know potassium nitrate in citrus nutrient management

It has been shown that KNO₃ boosts yield by producing high quality fruits, increasing sizing, TSS and intense color. University of Florida research, potassium nitrate has been shown to results that a KNO₃-based fertilizer program at a rate of 25 lbs/A/spray applied pre-bloom (mid-February), post-bloom (April) and at fruit fill (July/August) increased yield and size of fresh market 'Valencia' orange when compared to an untreated control. Both the KNO₃based program and control program received standard recommended soil fertilizer applications 3 to 4 times throughout the season.

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Egyptian citrus growers benefit from foliar nutrient applications

Egyptian citrus growers benefit from foliar nutrient applications

Sprays with potassium nitrate increased fruit size of ‘ Valencia ’ and ‘ Shamouti ’ orange

Sprays with potassium nitrate increased fruit size of ‘ Valencia ’ and ‘ Shamouti ’ orange

Potassium nitrate found to be the preferred K-source in ‘Valencia’ orange

Potassium nitrate found to be the preferred K-source in ‘Valencia’ orange

Foliar applied potassium nitrate increased individual fruit size in citrus

Foliar applied potassium nitrate increased individual fruit size in citrus

Potassium nitrate had better results for crops growing in desert soils under highly saline conditions

Potassium nitrate had better results for crops growing in desert soils under highly saline conditions

Egyptian citrus producers benefit from foliar application of nutrients

Egyptian citrus producers benefit from foliar application of nutrients

Foliar potassium nitrate applications in citrus were beneficial in terms of fruit yield, number of fruits and reducing fruit splitting

Foliar potassium nitrate applications in citrus were beneficial in terms of fruit yield, number of fruits and reducing fruit splitting

Phenology model: Timing of potassium nitrate sprays to increase citrus fruit size and fruit retention

Phenology model: Timing of potassium nitrate sprays to increase citrus fruit size and fruit retention

Potassium nitrate sprays resulted in more and larger-sized 'Valencia' oranges per tree

Potassium nitrate sprays resulted in more and larger-sized 'Valencia' oranges per tree

Nitrate is the preferred N source for citrus; Ammonium mineralization is enhanced when applied with sub-surface dripping

Nitrate is the preferred N source for citrus; Ammonium mineralization is enhanced when applied with sub-surface dripping