Viabilidade técnica da manta geossintética na produção de pimentão em função de diferentes lâminas de irrigação em Arapiraca, Alagoas.

Abstract

Pepper is among the ten most important vegetables in terms of economic value in Brazil, with Alagoas ranking 7th in the Northeast. The Arapiraca city is responsible for the production of 43.6% of the pepper produced in the State. However, due to the city being inserted in the semiarid region, the use of efficient techniques of use and management of water and soil is of great importance for agricultural activity. For these reasons, aimed, with this research, to evaluate the technical viability of the Soiltain® DW woven geosynthetic under three irrigation levels, in the cultivation of peppers in Arapiraca, Alagoas. The experiment was conducted in split-plot design, being in the main plots three irrigation levels (60, 100 and 150% of ETc) and in the subplots, four soil coverings (SoilTain® DW woven geosynthetic, bare soil, synthetic white and organic Mulchings), with five replications, totaling 12 treatments, with five replications. Agromorphological variables, components of pepper production, and soil temperature were evaluated. There was a significant interaction between the treatments, in which the woven geosynthetic showed superior results to white Mulching in relation to plant heights, stem diameter, leaf width and water use efficiency in the three irrigation depths, together with the bare soil treatments and organic Mulching. The 150% ETc level favored higher plant mortality during the crop development period, with a reduction in the stand, reducing yield, which ranged from 40.33 t ha-1 for white Mulching to 57.18 t ha-1 for organic Mulching. The soil temperature negatively influenced the development of the crop, being higher in white Mulching in all evaluations. The blanket also promoted greater profit and lower production cost and, likewise, the 100% ETc. level. The SoilTain® DW woven geosynthetic is viable as an alternative Mulching, and it is recommended to associate it with the 100% ETc level.