Crescimento e nutrição mineral do açaízeiro (Euterpe oleracea Mart.), em função da idade em sistemas agroflorestais no município de Tomé-Açu, Pará.

Abstract

The açaizeiro (Euterpe oleracea) is a typical palm of the Amazon region, which among the existing species of the Euterpe genus is of greater importance, as it presents by-products from the species, such as: fresh juice, drinks, ice cream and others. The new economic situation of the açaí market, both locally, as well as nationally and internationally, is characterized by a growing demand for the product, where upland plantations need technologies that boost the achievement of the high productivity found in the regions of Ilha do Marajó. In this way, the present work consists of the determination of the nutrient absorption gait by the açaizeiro in agloforestry systems (SAF's), cultivated on dry land, with plants from 2 to 7 years of age, where were sampled leaflets, arrows, petiole + rachis, stem , meristem, stipe and fruits evaluating the dry mass of these organs. The spacing maintained in the SAFs negatively influenced the growth of açaízeiro due to competition for water, light and nutrients, obtaining production of slow dry mass until the third year, with the greatest growth point only from the fourth to the fifth year. The variation in the levels of nutrients in all the organs of the açaizeiro was due to the low fertility of the oxisols, unbalanced fertilization, lack of irrigation and competition between plants in the SAF's implanted by the producers of Tomé-Açu, State of Pará. The maximum point of nutritional demand of the açaizeiro happened in the sixth year, the stipe and the leaflets are organs of greater accumulation ...