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Abstract(s)
A cultura da batata é considerada exigente em nutrientes. Em Agricultura Biológica não
é autorizado o uso de fertilizantes sintéticos, surgindo assim a fertilização foliar com urina
de vaca como uma alternativa orgânica que importa analisar. Numa parcela da Escola
Superior Agrária de Coimbra, certificada em Agricultura Biológica, foi instalado um
ensaio de 400 m2 com a cultura da batata. Visou-se averiguar o potencial da aplicação
foliar de urina de vaca como estratégia complementar para melhorar as características
produtivas, seja pelo contributo directo de nutrientes para a formação dos tubérculos ou
pela ajuda à manutenção de um aparelho fotossintético eficaz. Durante a experiência,
foram efectuados tratamentos semanais com urina a 1% e a 2% durante 7 semanas. De
igual modo, foram efectuados tratamentos quinzenais com urina a 1% e a 2% perfazendo
um total de 4 aplicações. O delineamento do ensaio consistiu em 4 modalidades de
aplicação e uma testemunha. Foram instaladas 3 repetições para cada uma das 5
modalidades. Foram avaliados alguns parâmetros de qualidade da produção: o calibre,
homogeneidade, produtividade, matéria seca e os teores de Azoto (N) na parte aérea e
nos tubérculos para cada um dos tratamentos.
Concluiu-se que os resultados dos diferentes tratamentos de fertilização foliar não
são significativamente diferentes nos parâmetros analisados, não evidenciando terem
ocorrido interações significativas com as diferentes concentrações das soluções
utilizadas, quando comparados com a testemunha.
Palavras-chave: Urina de vaca, Batata, Solanum tuberosum L., Fertilização foliar,
Agricultura Biológica
The potato crop has high nutrient demands. In Organic Farming the use of synthetic fertilizers is not allowed, thus, foliar fertilization with cow urine as an organic alternative should be analyzed. In an organic certified 400 m2 plot within ESAC, an experiment aiming to investigate the potential of foliar applications of cow urine as a complementary strategy to improve the productive characteristics of the tuber was installed, either by a direct nutrient contribution or by helping to keep a healthy canopy. During the trial, weekly treatments with 1% and 2% urine were performed for 7 weeks. As well as biweekly treatments with 1% and 2% urine, in a total of 4 applications. The trial consisted of 4 treatments and a control. 3 repetitions were installed for each of the 5 treatments. For each treatment, caliber, homogeneity, productivity, dry matter content and nitrogen (N) value in the shoot and tubers were evaluated. It was concluded that the different treatments of foliar application of cow urine obtained similar results, not evidencing significant interactions with the used solutions. Keywords: Cow urine, Potato, Solanum tuberosum L., Foliar fertilization, Organic Farming
The potato crop has high nutrient demands. In Organic Farming the use of synthetic fertilizers is not allowed, thus, foliar fertilization with cow urine as an organic alternative should be analyzed. In an organic certified 400 m2 plot within ESAC, an experiment aiming to investigate the potential of foliar applications of cow urine as a complementary strategy to improve the productive characteristics of the tuber was installed, either by a direct nutrient contribution or by helping to keep a healthy canopy. During the trial, weekly treatments with 1% and 2% urine were performed for 7 weeks. As well as biweekly treatments with 1% and 2% urine, in a total of 4 applications. The trial consisted of 4 treatments and a control. 3 repetitions were installed for each of the 5 treatments. For each treatment, caliber, homogeneity, productivity, dry matter content and nitrogen (N) value in the shoot and tubers were evaluated. It was concluded that the different treatments of foliar application of cow urine obtained similar results, not evidencing significant interactions with the used solutions. Keywords: Cow urine, Potato, Solanum tuberosum L., Foliar fertilization, Organic Farming
Description
Keywords
Urina de vaca Batata Solanum tuberosum L. Fertilização foliar Agricultura Biológica