Produção do quiabeiro no semiárido paraibano irrigado com água de reúso sob doses de nitrogênio

Abstract

The use of post wastewater - treated in agriculture is considered a fundamental alternative because of water scarcity mainly in arid and semi-arid regions. The objective of this research was to evaluate the effect of wastewater post - treated irrigation of okra culture and its tasks to irrigated soil. The experiment was conducted in lysimeters installed in an area within the Center of Science and Agrifood Technology (CSAT/UFCG) located in the Campus Pombal - PB in uncontrolled environment, from February to September 2014, the design was randomized complete block , with six treatments (N levels) and four replications. The treatments consisted of the following doses (D0 = only irrigation, D1 = 40 kg ha-1 ; D2 = 80 kg ha-1 , D3 = 120 kg ha-1 ; D4 = 160 kg ha-1 ; D5 = 200 kg ha-1 N). The culture used was the okra cv. Santa Cruz 47. We evaluated the growth variables such as stem diameter, plant height, leaf number, leaf area and biomass. For the production variable number of fruit was assessed, fruit diameter, unit weight, and fruit production. The increasing doses of N provided an increase in all growth variables evaluated and fruit yield of okra.