The objective of this research was to evaluate the effect of successive harvesting times and shading on the production of biomass, yield and phytochemical composition of essential oil in leaves and inflorescences of soilless grown Lavandula dentata. Plants were grown in pots filled with sand, inside a polyethylene greenhouse, in a closed system at UFSM. Plants were harvested at 150, 213 and 320 days after planting date (DAP) in winter, spring and summer, respectively. At 150 DAP, a 50% shading screen was installed. The experimental design was a randomized 3x2 factorial in subdivided plots with 36 plants per subplot. Fresh (FM) and dry mass (DM), yield and chemical composition of essential oil in leaves and inflorescences were determined after each harvest date. The essential oil was extracted, using 70 g fresh mass of leaves and of inflorescences, respectively. Identification and quantification of compounds in the essential oil were determined by gas chromatography/mass spectrometry (GC/MS). The FM of inflorescences was higher on plants harvested 213 DAP grown without shading while of leaves it was higher on plants harvested 320 DAP grown without shading. The yield of the essential oil was higher in the leaves of plants harvested 320 DAP grown without shading. Thirty-one compounds were identified and quantified, being the major ones 1.8 cineol, camphor and linalool, without significant difference among treatments. Three consecutive harvests can be made in August (150 DAP), October (213 DAP) and February (320 DAP) without replacing plants.
RESUMO:A importância do milho (Zea mays) não está apenas na produção de uma cultura anual, mas em todo o relacionamento que essa cultura tem na produção agropecuária brasileira, tanto no que diz respeito a fatores econômicos quanto a fatores sociais. Todos os aspectos de crescimento e desenvolvimento das plantas podem ser afetados pela deficiência hídrica e saturação de água nos tecidos, causada pela excessiva demanda evaporativa e/ou limitado suprimento de água. O objetivo desse trabalho foi avaliar os efeitos do alagamento sob conteúdo relativo de água, nº de folhas, massa seca do colmo, massa seca da raiz e massa seca das folhas em plantas de milho submetidas ao alagamento. O experimento foi conduzido em casa de vegetação da Universidade Federal Rural da Amazônia (UFRA -Capitão -Poço), utilizando-se plantas de milho variedade BR 5102, o delineamento experimental foi inteiramente casualizado (DIC) com fatorial 2 x 4, com duas condições hídricas: controle, déficit hídrico e quatro ciclos de estresse com 5 cinco repetições. Obtiveram-se resultados significativos em todos os parâmetros avaliados, concluindo que o alagamento influenciou negativamente na biometria das plantas. PALAVRAS-CHAVE:anoxia, produtividade, raiz. BIOMETRICS IN CORN SUBJECT TO FLOODINGABSTRACT: The importance of maize (Zea mays) is not only in the production of an annual crop, but in any relationship that culture has on Brazilian agricultural production, both with regard to economic factors as social factors. All aspects of growth and development of plants can be affected by water stress and water saturation in the tissues caused by excessive evaporative demand and / or limited water supply. The aim of this study was to evaluate the effects of flooding on relative water content, number of leaves, dry weight of stem, root dry mass and leaf dry weight in maize plants subjected to flooding. The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia (UFRA -Capitão -Poço), using corn plant variety BR 5102, the experimental design was completely randomized design (CRD) with 2 x 4 factorial, with two conditions water: control, drought and four cycles of stress with 5 repetitions. Achieved significant results in all parameters evaluated, concluding that the flooding negatively in biometrics plants.
Todos os aspectos de crescimento e desenvolvimento das plantas podem ser afetados pela deficiência hídrica e saturação de água nos tecidos, causada pela excessiva demanda evaporativa e/ou limitado suprimento de água. As conseqüências na planta pelo alagamento vão ser clorose, murchamento prematuro, queda da capacidade fotossintética, do potencial hídrico e da concentração de nutrientes nas folhas e diminuição no crescimento. O objetivo desse trabalho foi avaliar os efeitos do alagamento sob conteúdo relativo de água, transpiração, condutância estomática, relação raiz/ parte aérea e massa seca total em plantas de milho submetidas ao alagamento. O experimento foi conduzido em casa de vegetação da Universidade Federal Rural da Amazônia (UFRA - Capitão - Poço), utilizando-se plantas de milho variedade BR 5102, o delineamento experimental foi inteiramente casualizado (DIC) com fatorial 2 x 4, com duas condições hídricas: controle, déficit hídrico e quatro ciclos de estresse com cinco repetições. Obtiveram-se resultados significativos em todos os parâmetros avaliados, concluindo que o alagamento influenciou negativamente na ecofisiologia da planta e na massa seca total. PALAVRAS-CHAVE: anoxia, conteúdo relativo de água, transpiração.
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.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.