A carregar...
Publicação
Efeitos da aplicação de revestimento de cobre (copper coating) em tabuleiros alveolados na produção de plântulas em viveiro
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 5.23 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
A produção hortícola em viveiros e particularmente em tabuleiros alveolados constitui um passo fundamental para assegurar o vigor e a uniformidade das plântulas a transplantar nos sistemas agrícolas. Neste contexto, a aplicação de tecnologias que melhorem a qualidade do material vegetal detém uma relevância particular. O cobre (Cu), embora um micronutriente essencial, pode tornar-se fitotóxico em concentrações elevadas, afetando os processos fisiológicos e morfológicos das plantas. A tecnologia de copper coating, que se baseia no revestimento de tabuleiros alveolados ou substratos com compostos à base de cobre, surge como uma possível estratégia para a melhorar o desenvolvimento radicular e a qualidade das plântulas, mas os seus efeitos são ainda pouco estudados em diferentes espécies hortícolas.O presente trabalho teve como objetivo avaliar os efeitos de quatro concentrações de copper coating no desenvolvimento inicial de cinco culturas hortícolas distintas (alface verde e roxa – Lactuca sativa, espinafre – Spinacea oleracea, courgette – Cucurbita pepo e pimento – Capsicum annuum) produzidas em tabuleiros alveolados. Foram analisados parâmetros de crescimento, como o comprimento da parte aérea, comprimento dos cotilédones, taxa de estiolamento e peso médio por plântula. Complementarmente, foram avaliados parâmetros físico-químicos do substrato nos quais se incluiu o cobre (Cu), magnésio (Mg), cálcio (Ca), fósforo (P), potássio (K), pH e condutividade elétrica (CE).Os resultados demonstraram que o efeito do copper coating foi limitado e dependente da espécie. Apenas a alface verde apresentou diferenças significativas no peso médio por planta e o pimento registou aumento significativo no comprimento da parte aérea. Nas restantes culturas, não se observaram efeitos estatisticamente relevantes, embora tenham sido identificadas algumas tendências em concentrações intermédias (40 g/L). A análise do substrato comprovou aumentos apenas no teor de cobre, mantendo-se inalterados os restantes parâmetros químicos do substrato.Conclui-se que a aplicação de copper coating pode ter efeitos benéficos ou neutros em concentrações moderadas (espinafre, alface roxa e pimento), enquanto doses mais elevadas podem induzir respostas negativas em algumas espécies (alface verde e courgette), reforçando a necessidade de definição de limiares seguros de aplicação. Estes resultados evidenciam a importância da realização de ensaios complementares com maior número de repetições e avaliações adicionais da arquitetura radicular e da acumulação de cobre nos tecidos vegetais, de forma a consolidar o conhecimento sobre o potencial desta tecnologia na horticultura protegida.
Horticultural seedling production in nurseries, particularly in cell trays, is a fundamental step to ensure vigor and uniformity of seedlings for transplantation into agricultural systems. In this context, the application of technologies that improve the quality of plant material holds relevance. Copper (Cu), although an essential micronutrient, can become phytotoxic at high concentrations, affecting the physiological and morphological processes of plants. The copper coating technology, which consists of coating cell trays or substrates with copper-based compounds, emerges as a potential strategy to improve root development and seedling quality, but its effects remain little studied across different horticultural species.The present study aimed to evaluate the effects of four concentrations of copper coating on the initial development of five horticultural crops (green and red lettuce – Lactuca sativa, spinach – Spinacea oleracea, zucchini – Cucurbita pepo, and pepper – Capsicum annuum) produced in cell trays. Growth parameters such as shoot length, cotyledon length, etiolation rate, and average plant weight were analyzed. In addition, physicochemical parameters of the substrate were evaluated, including copper (Cu), magnesium (Mg), calcium (Ca), phosphorus (P), potassium (K), pH, and electrical conductivity (EC).The results showed that the effect of copper coating was limited and species-dependent. Only green lettuce exhibited significant differences in average plant weight, while pepper showed a significant increase in shoot length. In the remaining crops, no statistically significant effects were observed, although some trends were identified at intermediate concentrations (40 g/L). Substrate analysis confirmed increases only in copper content, while the remaining chemical parameters remained unchanged.It can be concluded that the application of copper coating may have beneficial or neutral effects at moderate concentrations (spinach, red lettuce, and pepper), whereas higher doses may induce negative responses in some species (green lettuce and zucchini), reinforcing the need to define safe application thresholds. These results highlight the importance of conducting complementary trials with a larger number of replications and additional evaluations of root architecture and copper accumulation in plant tissues, in order to consolidate knowledge about the potential of this technology in protected horticulture.
Horticultural seedling production in nurseries, particularly in cell trays, is a fundamental step to ensure vigor and uniformity of seedlings for transplantation into agricultural systems. In this context, the application of technologies that improve the quality of plant material holds relevance. Copper (Cu), although an essential micronutrient, can become phytotoxic at high concentrations, affecting the physiological and morphological processes of plants. The copper coating technology, which consists of coating cell trays or substrates with copper-based compounds, emerges as a potential strategy to improve root development and seedling quality, but its effects remain little studied across different horticultural species.The present study aimed to evaluate the effects of four concentrations of copper coating on the initial development of five horticultural crops (green and red lettuce – Lactuca sativa, spinach – Spinacea oleracea, zucchini – Cucurbita pepo, and pepper – Capsicum annuum) produced in cell trays. Growth parameters such as shoot length, cotyledon length, etiolation rate, and average plant weight were analyzed. In addition, physicochemical parameters of the substrate were evaluated, including copper (Cu), magnesium (Mg), calcium (Ca), phosphorus (P), potassium (K), pH, and electrical conductivity (EC).The results showed that the effect of copper coating was limited and species-dependent. Only green lettuce exhibited significant differences in average plant weight, while pepper showed a significant increase in shoot length. In the remaining crops, no statistically significant effects were observed, although some trends were identified at intermediate concentrations (40 g/L). Substrate analysis confirmed increases only in copper content, while the remaining chemical parameters remained unchanged.It can be concluded that the application of copper coating may have beneficial or neutral effects at moderate concentrations (spinach, red lettuce, and pepper), whereas higher doses may induce negative responses in some species (green lettuce and zucchini), reinforcing the need to define safe application thresholds. These results highlight the importance of conducting complementary trials with a larger number of replications and additional evaluations of root architecture and copper accumulation in plant tissues, in order to consolidate knowledge about the potential of this technology in protected horticulture.
Descrição
Palavras-chave
Copper Coating Tabuleiros Alveolados Plântulas Cobre Viveiros