Impact of salinity on the macro- and micronutrient uptake in mango (Mangifera indica cv. Osteen) with different rootstocks.
Durán Zuazo V. H., Martínez-Raya A., Aguilar Ruiz J., Franco Tarifa D.
Author Affiliation: Centro de Investigación y Formación Agraria de Granada, Apdo. 2027, 18080 Granada, Spain.
Spanish Journal of Agricultural Research 2 : 121-133
Abstract : Two mango (Mangifera indica) rootstocks, Gomera-1 and Gomera-3, grafted with the scion Osteen were irrigated at 4 different NaCl concentrations measured by electrical conductivity (1.02, 1.50, 2.00 and 2.50 dS m-1). The impact of salinity on macro- and micronutrient uptake was studied. Nutrient imbalances attributed to the effect of salinity on nutrient uptake, availability and partitioning within the plant were less pronounced with Gomera-1. These results indicated the greater capability of Gomera-1 to adapt to saline conditions. The saline irrigation significantly increased the concentration of P, Ca, Fe, Zn and Mn in leaves, and reduced the Mg content of both rootstocks, tending to decrease N, and increase K and Cu. In the stem, the N, Ca, Mg and Cu contents significantly increased, whereas Zn tended to decrease. The root system registered a significant decrease in P, K and Mg, and increase in N, Fe, Mn and Cu. The fibrous root tended to acquire more nutrients than the main root. With Gomera-1, the micronutrient concentrations in roots was higher than Gomera-3 in response to the increase in NaCl concentration.