Abstract:A alface é uma folhosa sensível a salinidade da água de irrigação e ao estresse hídrico e seus danos são causados por diversos fatores inerentes a fisiologia da planta. Objetivou-se com este trabalho avaliar diferentes lâminas de água e níveis salinos e seus efeitos na cultura da alface, através do SPAD, clorofilas (a e b) e carotenoides. O experimento foi conduzido em casa de vegetação no Campus de Arapiraca da Universidade Federal de Alagoas. O delineamento experimental utilizado foi em blocos casualizados, … Show more
“…According to Vieira et al (2014), the increase in the level of water replacement up to 100 % of the ETc causes increases in the chlorophyll content; however, the excess of water reduces the oxygen in the root zone, promoting a decrease in the levels of chlorophyll in the leaves. The increase in water replacement also increases the chlorophyll fluorescence, reduces the leaf temperature and alters the carotenoid levels (Silva et al 2015, Silva et al 2020.…”
Water deficit in cauliflower cultivation may impair its development and yield. This study aimed to analyze the agronomic performance of cauliflower grown in a protected environment, under different water conditions and silicon (Si) doses. The experiment was arranged in a randomized block design, in a 3 x 4 factorial scheme, with three levels of water replacement [40, 70 and 100 % of the evapotranspiration (ETc)] and four Si doses (0, 50, 100 and 150 kg ha-1), with four replications. Leaf (SPAD index, area, fresh and dry weight), stem (diameter, height, fresh and dry weight) and inflorescence (diameter, fresh weight, dry weight, water content and commercial classification) characteristics were evaluated. The replacement of 40 % of the ETc showed lower results for the SPAD index in the phases II and III, leaf area, leaf and stem fresh weight and inflorescence diameter. The 70 % replacement cultivation showed a yield similar to that of the 100 % of the ETc. The use of Si was beneficial for the productive performance of the cauliflower at all levels of water replacement.
“…According to Vieira et al (2014), the increase in the level of water replacement up to 100 % of the ETc causes increases in the chlorophyll content; however, the excess of water reduces the oxygen in the root zone, promoting a decrease in the levels of chlorophyll in the leaves. The increase in water replacement also increases the chlorophyll fluorescence, reduces the leaf temperature and alters the carotenoid levels (Silva et al 2015, Silva et al 2020.…”
Water deficit in cauliflower cultivation may impair its development and yield. This study aimed to analyze the agronomic performance of cauliflower grown in a protected environment, under different water conditions and silicon (Si) doses. The experiment was arranged in a randomized block design, in a 3 x 4 factorial scheme, with three levels of water replacement [40, 70 and 100 % of the evapotranspiration (ETc)] and four Si doses (0, 50, 100 and 150 kg ha-1), with four replications. Leaf (SPAD index, area, fresh and dry weight), stem (diameter, height, fresh and dry weight) and inflorescence (diameter, fresh weight, dry weight, water content and commercial classification) characteristics were evaluated. The replacement of 40 % of the ETc showed lower results for the SPAD index in the phases II and III, leaf area, leaf and stem fresh weight and inflorescence diameter. The 70 % replacement cultivation showed a yield similar to that of the 100 % of the ETc. The use of Si was beneficial for the productive performance of the cauliflower at all levels of water replacement.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.