Produtividade e qualidade de frutos de pepino africano em resposta à adubação nitrogenada

Abstract

Yield and quality of horned cucumber in response to nitrogen fertilizationAfrican horned cucumber (Cucumis metuliferus) is native from Africa and has great potential for international trade of both juice consumption and pharmaceutical uses. However, little is known about the crop management in our conditions, particularly in terms of nitrogen fertilization. This study aimed to evaluate the optimal N level for plant growth and fruit yield as well as fruit quality. The experiment was conducted in a greenhouse using 10 L pots. The experimental arrangement was a completely randomized design with six treatments corresponding to the N rates 0, 40, 80, 120, 160, 200 kg ha -1 , with 11 replications. The variables evaluated included fruit yield, shoot dry matter, root dry matter and physical and chemical characterization of the fruits. The number of fruits and weight of fresh matter of fruits per plant presented maximum values of 2.24 fruits/plant and 516.41 g/plant, respectively, for the rates of 122.50 and 154.44 kg ha -1 N. The average weight of fruit was estimated at 240.27 g/fruit at the maximum N level tested (200 kg ha -1 N). The highest shoot dry matter was 39.12 g/plant at 144.00 kg ha -1 N. The N levels did not influence the quality of the fruits. For the cultivation of African cucumber, we recommend the rate of 154.44 kg ha -1 N that provides 2.18 fruits/ plant with average mass of 237.07 g/fruit and yield estimated at 516.41 g/plant.

Rendimiento de pepino (Cucumis sativus L.) en función del tipo de bandeja y la edad de transplante de las plántulas

“…Por otra parte, en evaluaciones de pepino en invernadero, de siete genotipos en Brasil, y se encontró que el peso promedio del fruto osciló entre 279,2 y 300,8 g (Cardoso, 2002). Los valores del peso del fruto similares a los obtenidos en este trabajo, cuyos promedios en la cosecha precoz fue de 308 g, en la cosecha intermedia de 309 g, de 299 g en la cosecha tardía y en la cosecha 306,2 g Antunes et al (2014) estudiaron la respuesta de pepino africano a la fertilización nitrogenada y obtuvieron un peso promedio de 328,98 g*fruto -1 , superior a los pesos promedios obtenidos en este estudio. Suniaga et al (2008) encontraron peso de frutos desde 271 a 422 g en pepino variedad "Poinsett 76", valores que están dentro del rango obtenido en este trabajo.…”

‘Melão croá’ (Sicana sphaericaVell.) and ‘maracujina’ (Sicana odoriferaNaud.): chemical composition, carotenoids, vitamins and minerals in native fruits from the Brazilian Atlantic forest

“…Possible explanations for differences between the chemical concentrations of the compared fruits may be related to the fact that some creole cucurbit varieties have higher genetic variability [33]. In this context, Antunes et al [34] reported that distinct genetic materials, and also the environment weather conditions in which they were grown, significantly interfere in the chemical composition of some Cucurbitaceae. Another possible explanation may be the postharvest treatment of these fruits, since this procedure in regard to processing time and storage, among other parameters, is known to interfere with the chemical composition of vegetables [35,36].…”

Phytotechnical parameters and yield of watermelon plants under different irrigation and nitrogen levels

“…The lower LA observed in water and N deficit conditions is possibly characterized as a mechanism of adaptation of the plant to both hydric and nutritional stress. In cucurbits such as the watermelon plant, the increase in N dose Pereira et al (2020) Phytotechnical parameters and yield of... stimulates growth and an increase in LA (Antunes et al, 2014).…”