Abstract
One of the main limitations in the process of seedling production is the proper management of irrigation, since this practice implies the costs of orchard implantation. The application of the wrong amount of water leads to water stress in plants causing physiological changes, impairing its development and quality. Thus, the objective of this study was to evaluate the influence of different irrigation slides on the physiological behavior of 'Rubi INCAPER 511' papaya seedlings. The study was conducted during the period from September 9 to November 7, 2016. The experimental design was completely randomized, where the treatments consisted of four different irrigation depth: 8, 10, 12 and 14 mm d-1. Each treatment was composed of 24 plants (repetitions), totaling 96 plants in the experiment. 60 days after planting, plant leaves were evaluated using the following physiological characteristics: total chlorophyll content (SFR-G and SFR_R); flavonoid index (FLAV); anthocyanin index (ANT_RG and ANT_RB) and nitrogen balance (NBI_G and NBI_R). Irrigation depth between 10.96 and 11.03 mmd-1 provided better values for the analyzed characteristics. Therefore, the 11 mmd-1 depth is the most suitable for the production of seedlings, based on the physiological evaluations.
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