Crescimento e potencial osmóticofoliar do maracujazeiro amarelo sob águas salinizadas e adubação nitrogenada.

Abstract

Salinity, soil and / or water are factors that reduce the growth and development of crops in the semiarid region, notably those sensitive, such as passion fruit, and the correct nitrogen fertilization can reduce the effects of this stress factor. In this context, the aim, with this research, evaluate the growth and osmotic potential of irrigated yellow passion fruit with salted water and under leveis of fertilization with nitrogen in a protected environment. The experimental design was the randomized blocks, arranged in a factorial 5 x 5, with ave leveis of irrigation water salinity (CEA) (0.3, 1 .0, 1 .7, 2.4 and 3.1 dS m-l) and ave doses of nitrogen fertilization (60, 80, 100, 120 and 140%), based on the nitrogen recommendation 300 mg N dm-3 with ave repetitions, totaling 125 portion, beginning of treatment to 40 days after sowing (DAS) and ending at 85 DAS. They studied growth variables, potential osmotic membrane integrity of yellow passion fruit plants during the experiment. The increase in water salinity reduced growth, the accumulation of biomass, osmotic potential and integrity of leaf membradas passion fruit independent of nitrogen fertilization. The increase in nitrogen leveis negatively affected the growth and biomass accumulation of plants of yellow passion fruit.