NUTRITIONAL STATUS AND PRODUCTIVITY OF GUAVA TREE (PSIDIUM GUAJAVA L.) IRRIGATED WITH SALINE WATER AND TREATED WITH BIOSTIMULANTS

Resumen

Neste Obtaining high productivity in guava is achieved, among other factors, by mineral nutrition balanced with foliar nutritional levels in appropriate ranges. Salt stress causes nutritional imbalance that can be accompanied by toxicity, causing damage and yield drop. With the application of products such as biostimulants, the plant can acquire a new state of nutritional homeostasis, thus being able to obtain satisfactory productivity, even under stressful conditions. Therefore, the objective of this research was to evaluate the nutritional status and productivity of ‘Paluma’ guava tree irrigated with saline water and treated with biostimulants. The experiment was set up in a factorial scheme (2 x 4), referring to the spraying with Aminoagro Raiz® (Without and With) and the application of Codasal® and, or Amianoagro Raiz® via irrigation (Without, Codasal®, Aminoagro Raiz® and Codasal® + Aminoagro Raiz®), the treatments were distributed in randomized blocks with four replications. The determination of leaf N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Zn and Na was carried out in two phenologic phases (Flowering and Fruit growth). In the fruits, the levels and export of N, P, K, Ca and Mg were determined. Fruit yield was also obtained. It was verified that the treatments did not improve the nutritional status of the ‘Paluma’ guava tree, nor the fruit yield.