Impactos da deficiência de fósforo e zinco no metabolismo e crescimento inicial de Schizolobium parahyba

Abstract

Brazil, which is home to the largest tropical forest in the world, faces the challenge of balancing socioeconomic development with environmental conservation. In this context, reforestation emerges as an essential tool for restoring degraded areas and reestablishing ecological balance. This study aimed to evaluate the impact of the interaction between phosphorus (P) and zinc (Zn) on the metabolism and initial growth of the species Schizolobium parahyba (Vell.) Blake and its varieties Schizolobium amazonicum and Schizolobium parahyba. To achieve this, experiments were conducted in a greenhouse using specific nutrient solutions to induce deficiencies of these nutrients in the plants. Growth indicators, photosynthetic aspects, and the metabolite profile of the varieties subjected to four treatments were evaluated. The results indicated that the combined deficiency of P and Zn had a negative impact on plant growth and metabolism, especially in S. amazonicum, which proved to be more sensitive to the lack of these nutrients. On the other hand, S. parahyba showed greater resistance under nutritional stress conditions, maintaining growth even in the face of deficiencies. Based on these observations, it is concluded that for reforestation programs in degraded soils, S. parahyba may be a more suitable option due to its higher efficiency in nutrient use and adaptability.