Respostas fisiológicas de plantas de orégano (<i>Origanum vulgare</i> L.) cultivadas sob malhas coloridas e fertilizantes orgânicos

Abstract

Este estudo objetivou avaliar índices de trocas gasosas e o crescimento de plantas de orégano cultivadas em ambientes de luz modificados com o uso de malhas coloridas e adubação orgânica. Foram utilizadas plantas de orégano com ciclo de 90 dias, obtidas por meio de estaquia convencional. Adotou-se o DIC, com seis repetições, em fatorial 3x4 (dois adubos orgânicos acrescido de testemunha, e quatro ambientes de luz modificada com o uso de malhas coloridas nas cores azul, cinza e vermelha, mais testemunha). As plantas de orégano cultivadas sob malha azul e adubadas com esterco bovino apresentaram maior número de folhas; as malhas coloridas proporcionaram maior comprimento de haste e maior produção de massa seca; as plantas crescidas a pleno sol apresentaram maiores valores para as trocas gasosas. Conclui-se que os ambientes de luz modificada e adubação orgânica contribuem para a redução de trocas gasosas e favorecem o crescimento do orégano.

Light Levels Influence on Development and Leaves Reflectance Index of Imperial Zoysia Grass / Influência De Níveis De Luz No Desenvolvimento E Índice De Refletância Das Folhas De Grama Esmeralda Imperial

“…One alternative answer is due to higher growth rate (Table 1), which caused reduction in chlorophyll concentration by dilution effect. Oliveira et al (2017) and Gondim et al (2018) also published that plant to enabling greater light interception, under shading occasions tend to expand the number and size of leaf limb, corroborating to previous point of view and with results found by this research.…”

Impact of phosphorus and luminosity on the propagation, photochemical reactions and quality of Lippia alba (Mill.) N.E.Br. seedlings

“…The responses of plants to abiotic variants can change according to the species. Oliveira et al (2017), when assessing the physiological and productive aspects of Origanum vulgare L. plants, found greater root biomass under shaded cultivation. On the other hand, there was greater biomass allocation in Physalis minima L. seedlings under full sun (Silva et al 2016), similar to L. alba seedlings (Fig.…”

“…Generally, plants under shading tend to expand the number of leaf limbs, enabling greater light interception (Oliveira et al, 2017) and maximizing photosynthesis. These characteristics are important in the vegetative propagation of the species since the greater the amount of buds, the greater the formation of leaves, contributing to photoassimilate distribution to developing organs.…”

Green manure (Crotalaria juncea L.) enhances Origanum vulgare L. biomass accumulation, essential oil yield, and phytochemical properties

“…Plants used for medicinal, aromatic, and seasoning purposes are widely used and consumed worldwide; among the most consumed species is oregano (Origanum vulgare L.), which is known mainly for its use in cooking, often in tomato sauce, pizzas, salads, and meat (De Oliveira et al 2017). In addition, the constituents of this spice are used in the agricultural, pharmaceutical, and cosmetic industries as a flavoring substance in food products, alcoholic beverages, and perfumery due to its spicy fragrance (Coqueiro et al 2012, Pereira & Dos Santos 2013.…”