Citrus rootstocks have a strong influence on shoot mineral nutrition and consequently on the adaptation of citrus trees to adverse soil conditions. Since citrus yield is often limited by low P availability, a greenhouse study was carried out to evaluate the effects of P application in the nutrient solution (0.0125; 0.05; 0.2 and 0.8 mmol L-1) on growth and P nutrition of the citrus rootstocks varieties (‘Rangpur’ lime, ‘Swingle’ citrumelo, ‘Cleopatra’ and ‘Sunki’ mandarin). After 100 days of P treatments, […]

Two split root trials were carried out in nutrient solution to evaluate nitrogen accumulation as a function of phosphorus supply applied in partial contact to maize roots. After a seven day growth period in complete nutrient solution, maize seedlings were transplanted to joint pots containing 1.6 L of nutrient solution. Roots were equally shared between the pots. In the first trial, two phosphorus levels (0.02 mmol L-1 and 0.1 mmol L-1) and phosphorus and nitrogen placement were evaluated. In the […]