Taynara Peres de Lima
Abstract:
The determination of the correct irrigation depth for tomato fruit production has fundamental importance to obtain higher yields and higher quality fruits. Aimed to evaluate the productivity and development of hybrid table tomato Natália under different drip irrigation depths and two forms of fertilization. The experiment was conducted at the experimental area of the Federal University of Goiás - Jataí Regional, from April to September. The design used was randomized blocks with factorial arrangement 4x2 and 4 repetitions. Four different irrigation depths (66%, 100%, 133%, 166% of the daily reference evapotranspiration of the ETo site) were used, calculated daily by the Penman - Monteith method using the SMAI program, with data obtained from the automatic weather station of Jataí - GO through the INMET website. The other factor studied was fertilization, which was performed via fertigation and conventional fertilization. The fertilization was calculated according to the chemical analysis of the soil. Basic fertilization was done, and the remaining fertilization was split in six times, with the same dosage in all treatments. Each experimental unit consisted of 3 lines with 12 plants each, and only 8 plants of the central line were evaluated, excluding the borders. The results showed that for plant height and commercial productivity the blade 2 (100%) showed better performance. For the brix value, it was found that the smaller blades favored the increase of brix. Regarding the type of fertilization, it was observed that fertigation requires an ideal amount of water for its efficiency. In this work fertigation provided advantages superior to conventional fertilization when associated with slide 2 (100%).
