Produtividade e nutrição de açaizeiro irrigado em função de doses de boro no Nordeste Paraense.

Abstract

In the State of Pará, the açai tree (Euterpe oleracea Mart.) Is cultivated mainly in soils with low natural fertility, with boron (B) being one of the most limiting nutrients of productivity. The objective of this study was to evaluate the productivity and mineral nutrition of the irrigated crop harvester submitted to doses of B. The experiment was carried out in the municipality of Tomé-Açu, in the Northeast of Para. The experimental design was a randomized block design with four treatments (0, 20, 40 and 60 g / clump of B) and five replications, with 16 adult clots per plot. Soil and leaf analyzes were performed 17 months after fertilization with B. Fertilization influenced the plant contents and also the production of the açaizeiro, being the dose for the maximum agronomic yield of 30 g-¹ of B per clump and the highest dose economic yield of 24 g-¹ of B per clump for a production of 5423 kg ha-1 and 5360 kg ha-1 of fresh açaí fruit respectively. The productivity with the most economical dose corresponded to 99% of that obtained with the dose for the maximum agronomic yield.