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Sunflower Nutrition and Fertilization

Sunflower Nutrition and Fertilization

Plan your sunflower fertiliser application

Help your yield performs its best

With its unique taproot, sunflowers are capable of mining the soil to reach water and nutrients at depth but like any crop the right fertilisation will help your field perform its best. 

 

 

Needs Understanding

 

To achieve top yields in your sunflower crop it is important to understand the needs of the crop. Fertiliser applications should be made based on a soil test, to prevent improper application causing crop damage and, or yield loss. Placement of the fertiliser is also important to prevent damage to the seedling. 

soil understanding

 

Nitrogen Recommendations 

 

Nitrogen is an indispensable element which must be used with care when growing sunflowers 

 

  • Sunflowers needs 4 to 4.5 kg of absorbed nitrogen per quintal produced 

  • Over fertilising by 50 units means losing 50€/ha 

  • Under fertilising can cause losses of 4 to 6 q/ha 

  • Consequences of over application of nitrogen (excess) 

  • Lush growth 

  • Development of diseases (sclerotinia, phomopsis) 

  • Maturity is delayed 

  • Consequences of nitrogen deficiencies 

  • Yield loss due to a reduction in achenes per capitulum  

  • Yield loss due to reduced photosynthesis activity 

azote fertiliser sunflower

 

Phospho-potassic Application 

 

Phospho-potassic recommendations are based on your yield targets. 

  • For a yield objective of 40 q/ha, the sunflower requires little phosphorus (40 units) a moderate amount of potash (40 to 60 units). Management of these mineral elements is based on multi-year soil analyses.  

  • Over 80% of the phosphorus and potash used by the plant come from the soil’s reserves. 

fertiliser stage sunflower

 

To get agronomic advice or find seed, contact your local MAS Seeds representative here

 

 

Sunflower Grain

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