Produção de jambu irrigado sob diferentes tensões e doses de nitrogênio.

Abstract

Aiming to reduce the lack of technical information on the jambu crop, the present study aimed to study the effects of different strains and nitrogen levels submitted to different cultivation environments. The experiments were conducted in a greenhouse and in the field at the experimental farm of Igarapé-açu - UFRA. The experiment was carried out in a 10 x 10cm spacing using the experimental design of randomized blocks in a 4x4 factorial scheme with three replicates. Was used in the experiment the variety Jamburana. Each plot had a dimension of 0.4 x 0.5 m (0.2 m²) totaling 20 plants in 4 rows and considering the plants in the central rows. The treatments consisted of four soil water stresses (12, 18, 24 and 30 kPa) as indicative of the moment of irrigation, using drip irrigation, and four doses (0, 50, 100 and 150 kg ha-¹) of nitrogen. For the cultivation in protected environment, better indices were obtained with the tension of 18 kPa and the dose of nitrogen of 50 kg ha-¹, and for field cultivation the combination with the tension of 12 kPa and the dose of 150 kg ha-¹ presented the best indexes.