___________________________________________________________________________Resumo: A agricultura ecológica sempre apresenta inovações no sistema produtivo, tornando a aplicação de produtos via sementes uma prática rotineira. O uso de bioestimulantes vegetais tem mostrado grande potencial na produtividade. Este trabalho teve como objetivo avaliar o efeito de diferentes concentrações do extrato hidroalcoólico de confrei na germinação e desenvolvimento inicial de plântulas de milho. Neste estudo foram utilizadas como tratamentos cinco concentrações do extrato (0; 0,001; 0,01; 0,1 e 1 mL L -1 ) no tratamento de sementes de milho antes do plantio. As variáveis analisadas foram percentuais de germinação das sementes, índice de velocidade de emergência, comprimento da parte aérea, comprimento de raiz e matéria seca de plântulas. O delineamento utilizado foi o inteiramente casualizado com 4 repetições. De acordo com os resultados verificou-se que a concentração de 0,001 mL L -1 influenciou positivamente no comprimento radicular e no peso de matéria seca de plântulas de milho.
The collection time could be an important target for optimizing technological processes in obtaining essential oils of interest to agribusiness. The objective of this study was to distinguish the time for the collecting of Achillea millefolium L. leaves, which provides the highest yield and quality of the essential oil. Also, identify the type of polyethylene packaging and leaf storage period during the one-year period that would maintain the essential oil characteristics. Gas chromatography-mass spectrometry and chemometric studies were performed into two steps trial to detect changes in chemical profile induced by different conditions. First, an analysis of the leaf collection time was performed using chromatographic data from six different gathering times throughout the day. After determining the best time to collect from the leaves, the essential oil was extracted in five storage periods over a year. The highest oil content was observed in leaves harvested between 11 and 15 h, with a maximum of 39 min after 13 h. Therefore, it is recommended to perform extraction in the early afternoon. There was no significant statistical differentiation related to polyethylene packages. In addition, it is recommended that the essential oil can be stored without significant changes for up to six months.
Lysianthus cultivation is a recent activity when compared to the main cut flowers, and little is known about the techniques and the use of shading screens that can increase productivity in floriculture, resulting in favorable morphophysiological responses to the crop. The objective of this study was to verify whether shading screens impact the growth performance of lisianthus varieties. The experiment was carried out in a greenhouse in São Benedito farm, located in São Benedito, Ceará. The varieties studied were Lisianthus ABC 2-3 Blue, Lisianthus Allemade White and Lisianthus ABC 2-3 Rose, and three environments, one with aluminized screen (AS), one with red screen (RS) and the third environment without screen shading (WS). The experimental design was completely randomized in a 3 x 3 factorial scheme, with three environments and three varieties with three replications. The following were analyzed in cm: button diameter (BD); rod height (RH); actual size (AS); commercial size (CS); rod thickness (RT); and by counting, the number of buttons per stem (BS). The blue variety was better adapted to the conditions imposed by the AS environment, the rose variety presented the best results in the WS environment and the white variety, under the conditions of the experiment, would be unsuitable for the crop cultivation. The RS environment does not offer conditions conducive to satisfactory growth in rod size. Lysianthus cultivation is influenced by the use of shading screens.
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