Effects of stoichiometric ratio fertilization on leaf photosynthetic characteristics and fruit quality of blueberry

Stoichiometric analysis revealed that blueberry during the flowering, fruit setting, young fruit, and fruit expansion periods required 4.85, 5.89, 3.21, and 12.63 g of N, 0.17, 0.18, 0.18, and 0.40 g of P, and 3.54, 3.24, 3.32, and 5.28 g of K, respectively. These nutrients were sourced from 22.88, 27.81, 15.13, and 59.60 g/plant of ammonium sulfate, 0.67, 0.72, 0.71, and 1.61 g/plant of superphosphate, and 7.90, 7.25, 7.43, and 11.80 g/plant of potassium sulfate.