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Advisor(s)
Abstract(s)
O uso da água e fertilizantes na agricultura de forma sustentável tornou-se uma prioridade, simultaneamente
com a implementação de técnicas culturais que mantenham rendimentos elevados, melhorando assim as
produtividades da água e da fertilização. O objetivo desse estudo consiste em avaliar os efeitos de diferentes
níveis de rega e de fertilização azotada no rendimento e qualidade da cultivar de tomate coração-de-boi.
O ensaio foi delineado em talhões subdivididos (“split block”) com três tratamentos de irrigação: 33,3%ETc
(R1); 66,7%ETc (R2) e 100%ETc (R3) e quatro níveis de azoto: sem azoto (N0), 50 kg ha-1 (N1), 100 kg ha-1 (N2) e
200 kg ha-1 (N3). Avaliou-se o efeito dos tratamentos nas componentes da produção e da qualidade, no azoto
aparentemente recuperado (NAR) e na produtividade da água.
Os resultados mostram, para produtividade total e comercial, uma interação significativa entre fertilização
azotada e lâminas de água aplicadas. No tratamento N3R2 registou-se a maior produtividade (102,5 Mg ha-1)
que foi significativamente superior aos restantes tratamentos. A consistência e o pH não foram afetadas pelos
níveis de azoto e rega. O azoto aparentemente recuperado (NAR) aumentou linearmente com o aumento da
dose de fertilizante azotado. No tratamento N3 registou-se um maior valor de NAR (23,3 %).
A rega deficitária teve um efeito no aumento do teor de sólidos solúveis totais e na produtividade da água. O
tratamento R1 registou o maior valor de produtividade da água com 22,6 kg m3, seguido do tratamento R2 e R3
com 16,1 kg m3 e 8,8 kg m3, respetivamente.
Sustainable water and fertilizer used in agriculture has become a priority, along with the adoption of field management strategies that maintain high yields, thus improving both fertilizer and water productivity. The objective of this study was to evaluate the effects of different levels of irrigation and nitrogen fertilization on yield and quality parameters of the tomato fruit (cv. coração-de-boi) The experiment was arranged as a split block design with three irrigation treatments: 33.3%ETc (R1); 66.7%ETc (R2) e 100%ETc (R3) and four nitrogen rates: no nitrogen (N0), 50 kg ha-1 (N1), 100 kg ha-1 (N2) and 200 kg ha-1 (N3). The effect of the treatments on the production and quality components, apparent nitrogen recovery (ANR) and water productivity was evaluated. The results show, for total and commercial yield, a significantly interaction between nitrogen fertilization and irrigation. The highest yield was 102.5 Mg ha-1 in the N3R2 treatment, which was significantly higher than the yields from the other treatments. Consistency and pH were not affected by nitrogen and water levels. Apparent nitrogen recovery (ANR) increased linearly with increasing level of nitrogen fertilizer. The highest ANR was 23.3% in the N3 treatment. The deficit irrigation treatments had an effect on the increase of total soluble solids content and water productivity. The water productivity (WP) was strongly related to the type of irrigation treatment used. The mean WP for the R1 treatment was 22.6 kg m3, followed by R2 (16.1 kg m3) and R3 treatment (8.8 kg m3).
Sustainable water and fertilizer used in agriculture has become a priority, along with the adoption of field management strategies that maintain high yields, thus improving both fertilizer and water productivity. The objective of this study was to evaluate the effects of different levels of irrigation and nitrogen fertilization on yield and quality parameters of the tomato fruit (cv. coração-de-boi) The experiment was arranged as a split block design with three irrigation treatments: 33.3%ETc (R1); 66.7%ETc (R2) e 100%ETc (R3) and four nitrogen rates: no nitrogen (N0), 50 kg ha-1 (N1), 100 kg ha-1 (N2) and 200 kg ha-1 (N3). The effect of the treatments on the production and quality components, apparent nitrogen recovery (ANR) and water productivity was evaluated. The results show, for total and commercial yield, a significantly interaction between nitrogen fertilization and irrigation. The highest yield was 102.5 Mg ha-1 in the N3R2 treatment, which was significantly higher than the yields from the other treatments. Consistency and pH were not affected by nitrogen and water levels. Apparent nitrogen recovery (ANR) increased linearly with increasing level of nitrogen fertilizer. The highest ANR was 23.3% in the N3 treatment. The deficit irrigation treatments had an effect on the increase of total soluble solids content and water productivity. The water productivity (WP) was strongly related to the type of irrigation treatment used. The mean WP for the R1 treatment was 22.6 kg m3, followed by R2 (16.1 kg m3) and R3 treatment (8.8 kg m3).
Description
Keywords
Fertilização tomate Rega deficitária Produtividade da água Azoto aparentemente recuperado Solanum lycopersicum Sustentabilidade
Citation
Carvalho, Miclay; Rodrigues, M:A:; Ribeiro, A.C. (2017). Efeito da rega e da fertilização azotada no rendimento e qualidade do tomate. In IX Congresso Ibérico de Agroengenharia: Livro de Resumos = IX Congreso Ibérico de Agroingeniería: Libro de Resúmenes. Bragança: Instituto Politécnico. ISBN 978-972-745-229-3