The cultivation of onion in the Brazilian Northeast region has been gaining prominence due to the favorable edaphoclimatic conditions and the use of technology. However, the increase in production costs, price fluctuations and the suppression of sulfur in fertilizer formulations constitute a risk for the farmers. Thus, the aim of this study was to evaluate the productive and economic aspects of onion production as a response to sulfur fertilization. Two experiments were carried out from June to November 2018 and 2019, at the Rafael Fernandes Experimental Farm, belonging to the Universidade Federal Rural do Semi-árido, in the municipality of Mossoró, Rio Grande do Norte, Brazil, in an Ultisol. The experimental design was randomized complete blocks with 14 treatments and four replicates, corresponding to the combination of two onion cultivars and seven doses of sulfur. The following characteristics were evaluated: sulfur content in the diagnostic leaf, bulb yield, total operating costs, gross revenue, net revenue, rate of return and yield index. Regardless of the cultivar, input costs add up to higher expenses, reaching approximate values of 60.6 and 48.4% of the total operating cost for the Rio das Antas and IPA 11 cultivars, respectively. Rio das Antas was more sulfur efficient, achieving greater bulb yield and net revenue. The 34 kg ha-1 sulfur dose promoted maximum yield and net revenue for Rio das Antas. The application of sulfur did not influence the yield of the IPA 11 cultivar.
The onion (Allium cepa L.) is the third most cultivated vegetable and has great socioeconomic importance worldwide. Because it is highly perishable and has greater demand than supply, many post-harvest losses occur, most of them caused by inadequate storage conditions affecting the bulbs quality. This study aimed to evaluate the postharvest quality of onion as a function of fertilization with micronutrients, using the cultivar “Rio das antas”. The experiment was divided into two stages: field and laboratory. In the field, an experiment was installed between June and December 2019 at Experimental Farm Rafael Fernandes, in completely randomized blocks with nine treatments and four replications. The treatments consisted of the combined doses of B, Cu and Zn. In the laboratory, the experimental design was in completely randomized blocks in 9 x 4 split-plot design, with four replications. The treatments (micronutrients B, Cu and Zn) were arranged in the plots and the storage times were arranged in the subplots (0; 20; 40 and 60 days after harvest). Bulb firmness, soluble solids (ºBrix), total soluble sugars and pungency were evaluated. The data were subjected to statistical analysis as a function of storage time, by the Sisvar program, applying regression analysis. The combined application of doses of 1-4-1 kg.ha-1 of Boron, Copper and Zinc, respectively, presented the best results for pungency, firmness and sugars during storage, this being the most recommended treatment for not significantly different from higher doses, promoting more efficient use of inputs.
O armazenamento adequado de sementes de feijão-caupi é uma etapa essencial para a conservação de sementes com alta qualidade fisiológica. Desse modo, é necessário buscar formas alternativas que, associadas às condições de armazenamento, auxiliem na preservação para o melhor desempenho das sementes. Objetivou-se testar pré-tratamentos com luz aliados ao hidrocondicionamento em sementes armazenadas de feijão-caupi (Vigna unguiculata (L.) Walp.), verificando a influência destes na qualidade fisiológica das sementes. A metodologia adotada no experimento constou de uma pesquisa experimental, em que sementes de feijão-caupi foram submetidas a hidrocondicionamento e pré-tratamentos com diferentes regimes de luz (branca, escuro, vermelho, vermelho extremo, verde e azul) por um período de 5h, seguidos de secagem por 48h. As variáveis analisadas foram: emergência, índice de velocidade de emergência, comprimento da parte aérea e raiz, massa seca da parte aérea e raiz. O delineamento experimental utilizado foi o inteiramente casualizado em esquema fatorial 5 x 6 (períodos de armazenagem: 40, 80, 120, 160 e 200 dias, associados aos regimes de luz: branca, escuro, vermelho, vermelho extremo, verde e azul). Os resultados indicam que os regimes de luz azul, vermelho e vermelho extremo exercem efeitos no crescimento e desenvolvimento de plântulas de feijão-caupi ao longo do armazenamento. Conclui-se que os pré-tratamentos com luz azul, vermelho e vermelho extremo podem ser utilizados em sementes de feijão-caupi, no entanto, o efeito dos pré-tratamentos nas sementes é reduzido no decorrer do tempo de armazenamento.
Micronutrients structurally constitute several enzymes and act as a cofactor of essential proteins to maintain cell function, thereby contributing to crop growth and yield. The objective of this study was to evaluate the leaf content, growth, accumulation of micronutrients, classification and yield of onion as a function of fertilization with boron, cooper and zinc in two years of cultivation. The experiments were carried out from June to November in 2018 and 2019, in a soil classified as Ultisol, both at the Rafael Fernandes Experimental Farm, belonging to the Universidade Federal Rural do Semiárido, in the municipality of Mossoró, Rio Grande do Norte, Brazil. The experimental design was in randomized blocks with 15 treatments and four replicates. The treatments consisted of application of doses of B, Cu and Zn, in two experiments. Contents of B, Cu and Zn in the diagnostic leaf, growth, accumulation of B, Cu and Zn in the leaf, bulb and total, classification and commercial, non-commercial and total yields were evaluated. Application of B, Cu and Zn did not influence the number of leaves, relation of bulb shape, leaf, bulb, and total dry mass and yield of onion. Application of B, Cu and Zn, respectively at doses of 1-2-1 kg ha-1 favored a greater accumulation of B, Zn and Cu in the bulb. Higher number of leaves, leaf dry mass, bulb dry mass, total dry mass, class 1 bulbs and non-commercial yield were produced in Experiment 1.
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.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.