CONCENTRACIÓN DE NITRATOS EN DOS TIPOS COMERCIALES DE LECHUGA (Lactuca sativa L.) CULTIVADAS CON DISTINTAS FUENTES NITROGENADAS

Ollúa, Ricardo Tomás; Logegaray, V.; Chiesa, Á.

doi:10.4067/s0719-38902016005000004

Cited by 4 publications

(6 citation statements)

References 11 publications

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“…A similar effect occurs in plants nurtured with high amounts of N: the concentration of this ion in the sap tends to be higher. However, Ollúa et al (2016) point out that applying 75 kg doses of N ha 1 to butterhead lettuce reduces the NO 3 concentration in the sap. This behavior is possibly the result of a dilution effect, since the plants obtained a higher biomass.…”

Section: Resultsmentioning

confidence: 97%

“…The accumulation of NO 3  in plants depends on the amount of N applied (Liu et al, 2014) and the size of the biomass of the plants. Ollúa et al (2016) pointed out that as the N dose increases, the concentration of NO 3  in the loose-leaf lettuce also tends to increase. These findings match the results found in this research for the plants that were developed in the soil to which alfalfa had been added.…”

Section: Resultsmentioning

confidence: 99%

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Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Gómez¹,

Pérez

Zermeño-González³

et al. 2023

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Objective: To determine the optimal nitrogen dose combined with alfalfa in the growth, yield, and ion concentration in the sap of the lettuce leaf. Design/Methodology/Approach: We used a completely randomized experimental design, with a 2×5 factorial arrangement and nine repetitions in each treatment. The treatments consisted of five nitrogen doses (200, 250, 300, 350, and 400 kg ha-1) and two soil conditions (with and without alfalfa). Results: Aerial fresh weight (AFW), aerial dry weight (ADW), end-to-end diameter of the shoot (EDS), maximum diameter of the shoot (MDS), shoot weight (SW), and yield were higher when a 200-300 kg ha-1dose of N was applied along with alfalfa. This application had a similar effect to the 300 kg dose of N ha-1, applied without the addition of alfalfa. The concentration of nitrates (NO3-) in the sap decreased with the addition of alfalfa and 200 kg of N ha-1. The concentration of potassium (K+) was higher with or without the addition of alfalfa and 250 kg of N ha- 1. The concentration of calcium (Ca2+) was higher in the plants that received a 400-kg dose of N ha-1, whether alfalfa was included or not. Study Limitations/Implications: The lack of equipment prevented the determination of the nitrogen available in the soil. Findings/Conclusions: The incorporation of alfalfa into the soil is a good alternative to improve lettuce production and reduce the use of nitrogen fertilizers.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Gómez¹,

Pérez

Zermeño-González³

et al. 2023

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“…However, in both seasons, it was found that the higher the N rate, the higher the nitrate content in the arugula leaves (Figure 3). Nitrate content in arugula is an attribute that may compromise the quality of the vegetables, since, according to Maynard et al (1976), Khan et al (2013) and Ollúa, Logegaray and Chiesa (2016), that this compound is associated with the possibility of formation of carcinogenic and mutagenic compounds in the human organism.…”

Section: Figure 2 (A)mentioning

confidence: 99%

“…When the absorption by the plant is greater than actual demand, characterising the excess, the nutrient is stored as nitrate (NURZYŃSKA-WIERDAK, 2009). Nitrate is not harmful to man, but under potentiating conditions present in the human organism, nitrate can combine with amines, and producing nitrosamines that are mutagenic and carcinogenic, or possibly achieving the bloodstream and cause methaemoglobinaemia (KHAN et al, 2013;OLLÚA;LOGEGARAY;CHIESA, 2016).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Rates on Growth, Yield and Nitrate Foliar Content of Arugula

et al. 2021

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Nitrogen is the second nutrient most demanded by arugula. However, the positive effect it has on yield can negatively impact the quality of this vegetable, with negative effects on human health. Two experiments (summer and autumn) were carried out to evaluate the effect of N rates (0, 50, 100, 150, 200 and 250 kg ha−1) on the arugula growth, yield and quality (nitrate content). Each experiment was set up in a randomized block design with four replications. Increasing rates of N reflected positively on leaf N content and thus, higher and desirable values of height, leaf number, leaf area and plant dry mass were obtained in both growing seasons. Consequently, the yield had significant increase, which N was maximized in summer (4.9 kg m−2) and autumn (2.6 kg m−2) and leaf N of 29.4 and 27.0 g kg−1, respectively, at rates of 250 and 213 kg ha−1 and both growing seasons. The higher rate the higher foliar nitrate content of arugula, in summer (2931.3 mg kg−1) and autumn (4218.4 mg kg−1). The foliar nitrate content in both crop season do not reach the risk level to human being heath.

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“…Quanto à adubação, o nitrogênio (N) é para a maioria das culturas o principal nutriente que limita o crescimento e a produtividade das lavouras (Chowdhury & Das, 2015), principalmente hortaliças, as quais apresentam relativamente rápido desenvolvimento (ciclo curto) e produção elevada. (Ollúa et al, 2016).…”

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Avaliação da aplicação de ureia no desenvolvimento fenológico do pimentão (<em>Capsicum annuum</em> L.)

Santos¹,

Barros²,

Galdino³

et al. 2023

CLCS

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O pimentão (Capsicum annum L.) é considerado uma das mais importantes olerícolas no mercado nacional. Desse modo, torna-se importante realizar pesquisas visando o desenvolvimento de novos métodos que melhorem o desenvolvimento e produção das plantas através da nutrição e fertilidade do solo. Com este trabalho, objetivou-se acompanhar o desenvolvimento fenológico do pimentão em resposta a doses de ureia. O experimento foi realizado na estufa da Universidade Estadual de Alagoas de setembro a novembro de 2022. O delineamento experimental foi inteiramente casualizado (DIC) com 4 tratamentos e 5 repetições, solo sem adição de ureia (t1), solo com 5 g de ureia (t2), solo com 10 g de ureia (t3) e solo com 15 g de ureia (t4). Os dados do acompanhamento fenológico foram registrados em planilhas do Excel e analisados no AgroEstat para verificar a análise de variância (ANOVA) e a comparação de médias, através do teste Tukey a 5% de probabilidade. Com os resultados obtidos, o tratamento onde houve uma maior influência no desenvolvimento da cultura, foi aquele com adição de 5 g de ureia, evidenciando diferença significativa na pré-colheita na variável altura da planta (AP) e na pós-colheita na variável massa fresca (MF), tamanho total (TT) e número de sementes (NS).

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CONCENTRACIÓN DE NITRATOS EN DOS TIPOS COMERCIALES DE LECHUGA (Lactuca sativa L.) CULTIVADAS CON DISTINTAS FUENTES NITROGENADAS

Cited by 4 publications

References 11 publications

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Interaction between nitrogen doses and alfalfa (Medicago sativa L.) incorporation in lettuce (Lactuca sativa L.) production

Nitrogen Rates on Growth, Yield and Nitrate Foliar Content of Arugula

Avaliação da aplicação de ureia no desenvolvimento fenológico do pimentão (<em>Capsicum annuum</em> L.)

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