Abstract:RESUMO Avaliou-se o efeito de 4 níveis de adubação orgânica (0, 3, 6 e 9 kg/m2) na produção da calêndula (Calendula officinalis L.) e dos artrópodes associados em 2 cultivos no campus da Universidade Federal de Minas Gerais no Município de Montes Claros, MG. O delineamento experimental foi em blocos casualizados com 8 repetições. A dose de adubo orgânico, não residual, recomendada para produção quantitativa (número de capítulos/planta) e qualitativa (teor de flavonóides totais) de calêndula é de 6 kg/m2, contu… Show more
“…On the other hand, the lowest diameter of flower was explored in the control treatment without bio for 1st and 2nd season respectively. These results are in consent with Leite et al (2005)…”
Recently, the usage of eco-friendly fertilizers instead of the agrochemicals has gained great attention worldwide. In this study, the effects of phosphorus and potassium ore (0, 25, 50 and 100% of the recommended dose) were evaluated individually or in combination with phosphorin as biofertilizer to enhance the growth and flowering of Calendula officinalis. The results indicated that the treatment of P25% + K50% + phosphorin or P25%+ k100%+ phosphorin achieved the highest significant (P≤ 0.05) increases in plant height and the number of brunches and flowers compared to the control. Meanwhile, the flower diameter was not affected by different treatments. A similar trend was observed in both plant and flowers' fresh and dry weights. Chlorophyll was also significantly improved by the treatment of P25% + K50% + phosphorin or p25%+ K25%+ phosphorin in both seasons respectively. The biochemical attributes of the leaves and the produced flowers confirmed that total carbohydrates, carotenoids, N, P and K were positively responded to the eco-friendly fertilizers compared to the conventional fertilizers. The objective of this study was to evaluate the effect of natural and biofertilizers instead of mineral fertilizers. These procedures can be recommended due to its safe and ecofriendly influences on humans and environment.
“…On the other hand, the lowest diameter of flower was explored in the control treatment without bio for 1st and 2nd season respectively. These results are in consent with Leite et al (2005)…”
Recently, the usage of eco-friendly fertilizers instead of the agrochemicals has gained great attention worldwide. In this study, the effects of phosphorus and potassium ore (0, 25, 50 and 100% of the recommended dose) were evaluated individually or in combination with phosphorin as biofertilizer to enhance the growth and flowering of Calendula officinalis. The results indicated that the treatment of P25% + K50% + phosphorin or P25%+ k100%+ phosphorin achieved the highest significant (P≤ 0.05) increases in plant height and the number of brunches and flowers compared to the control. Meanwhile, the flower diameter was not affected by different treatments. A similar trend was observed in both plant and flowers' fresh and dry weights. Chlorophyll was also significantly improved by the treatment of P25% + K50% + phosphorin or p25%+ K25%+ phosphorin in both seasons respectively. The biochemical attributes of the leaves and the produced flowers confirmed that total carbohydrates, carotenoids, N, P and K were positively responded to the eco-friendly fertilizers compared to the conventional fertilizers. The objective of this study was to evaluate the effect of natural and biofertilizers instead of mineral fertilizers. These procedures can be recommended due to its safe and ecofriendly influences on humans and environment.
“…De acordo com Leite et al (2022), a adubação orgânica é responsável por enormes benefícios, principalmente ao solo como uma boa estruturação, diminuição bruscas de temperatura, aumento da biodiversidade de microrganismos, o que aumenta consequentemente a solubilização de nutrientes e também ajudam controlar a quantidade de nematoides no solo.…”
A compostagem na agricultura familiar revela-se como uma alternativa eficaz para a otimização dos resíduos gerados nas unidades produtivas, ao mesmo tempo em que diminui os gastos com insumos externos. O objetivo deste estudo consistiu em avaliar tanto o perfil socioeconômico dos agricultores familiares quanto as fontes geradoras de resíduos, bem como as formas de implementação da compostagem nas unidades produtivas da Colônia Reunida, localizada no município de Paragominas, Pará. O público-alvo compreendeu dezessete agricultores familiares que se dedicam à olericultura e estão devidamente cadastrados na Secretaria Municipal de Agricultura de Paragominas. Para atingir esses objetivos, foram conduzidas entrevistas estruturadas, utilizando um roteiro composto por seções que abordavam o perfil socioeconômico, características da unidade produtiva, tipos de produção, compostos orgânicos utilizados e culturas que se beneficiaram com a adubação orgânica. Quanto à força de trabalho nas unidades produtivas, constatou-se uma variação entre 1 e 2 pessoas (70,59%), bem como entre 2 e 5 pessoas (29,41%). Os principais resíduos orgânicos empregados no processo de compostagem abrangem esterco de aves e de curral, resíduos vegetais e dejetos suínos. As hortaliças emergiram como a cultura primordial que se beneficiou com a aplicação da adubação orgânica. Este estudo aponta a compostagem como uma estratégia promissora para a agricultura familiar, não somente para mitigar os resíduos produzidos, mas também para potencializar a qualidade e a sustentabilidade das práticas agrícolas.
“…Calendula officinalis L. (Asteraceae), popularly known as 'calendula' or 'bem me quer', is a species of agroeconomic interest due to its applicability in gardening and landscaping, in addition to the flow of capitula due to its uses in the pharmaceutical and cosmetic industries (LEITE et al, 2005;BORBA et al, 2012;SIMÕES et al, 2020), making it a good choice for cultivation in agroecological systems. In order to obtain uniform plants, the propagation phase is one of the most important stages, as the quality of seedlings will generally be reflected in their development in the field.…”
In order to establish protocols that can contribute to the propagation of medicinal plants, this study evaluated the effect of hydropriming and substrates on the emergence and production of Calendula officinalis L. seedlings. Seeds were submitted or not to hydropriming for 24 hours, and subsequent sowing in four substrates: S1) 100% Dystroferric Red Latosol - DRL, S2) DRL + coarse sand (1:1 v/v), S3) DRL + Tropstrato® commercial substrate (1:1 v/v) and S4) 100% Tropstrato®, and kept in greenhouse with 50% shading. Higher emergence percentage in substrates with the presence of DRL was observed. Seed hydropriming impaired seedling emergence, but contributed to root growth, biomass production and seedling quality. The 100% Tropstrato® substrate favored higher dry mass production and seedling quality. Positive linear correlation (≥ 0.70) was observed between shoot and root growth characteristics with biomass production and Dickson’s quality index. Principal component analysis explained 78.95% of the experimental variance, excluding the first count and the shoot/root ratio with low representativeness. In the cluster analysis of Euclidean distances, seedlings with the greatest similarity were those produced with 100% DRL and DRL + Tropstrato® with and without hydropriming, respectively. Dystroferric Red Latosol is recommended pure or combined with Tropstrato® for the production of C. officinalis L seedlings, and the hydropriming impaired seedling emergence characteristics.
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