Produção de pimentão (Capsicum annuum L.) em diferentes níveis de nitrogênio e lâminas de irrigação.

Abstract

With the objective of studying the effects of nitrogen and irrigation level in the development and production of the pepper culture (Capsicum annuum L), hybrid Magali R, cultivated in a controlled atmosphere, an experiment was conducted in the green house of the Water Resources Department as part of the Technological Teaching Center Institute -CENTEC, in Sobral-CE. Four irrigation levels were applied (50, 75, 100 and 125% of Class A Evaporation Pan -ECA) associated with four levels of nitrogen (0, 50, 75 and 100% of N), being adopted the entirely randomized experiment technique and fatorial type 4 x 4 , with 5 repetitions. The pepper plants were cultivated in reservoirs with 15 liters capacity with a plant for every reservoir. The nitrogen fertilizer was applied manually, while the irrigation sheets were applied by a dripper irrigation system, with a dripper for every plant. The daily irrigations were applied according to the Evaporation Pan index and the nitrogen doses followed the recommendations from the "manual de adubacao e calagem para o estado do Ceara" a guideline for fertilization and acid correction in Ceara State . The characteristics related to growth, production, plant mass and water use efficiency were analyzed. It was verified that the number of fruits for the hybrid Magali R was four times higher as the nitrogen levels increased and the highest productivity (15,013 t.ha-1) was observed for the treatment with both the highest irrigation sheet and level of nitrogen (L4N4).