Nutrient conductivity effects on sweet pepper plants grown using a nutrient film technique

Tadésse, Teshome; Nichols, M. A.; Fisher, K.J.

doi:10.1080/01140671.1999.9514101

Cited by 32 publications

(19 citation statements)

References 29 publications

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“…Unlike in other species, such as cucumber, melon or tomato fruits (Adams and Ho, 1989;Schaffer et al, 1989;Navarro et al, 1999), salinity did not increase the TSS, probably due to the fruit respiration observed when the ionic strength of the nutrient solution increases (Tadesse et al, 1999). Previous studies on pepper fruits have found similar results for similar salinity levels (Navarro et al, 2002).…”

Section: Discussionmentioning

confidence: 48%

The effect of salinity on yield and fruit quality of pepper grown in perlite

Navarro¹,

Garrido

Flores

et al. 2010

Span. j. agric. res.

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To determine the effect of irrigation with saline water (15 and 30 mM NaCl) on yield and quality of peppers, plants were grown hydroponically under greenhouse conditions in perlite, a common growing medium used for commercial cultivation. Fruits were collected in three states of maturity (green, turning and red states) and the changes in fruit quality that take place during these maturity stages were studied also, in order to find the optimal harvest time, with respect to fruit quality. With these moderate salinity levels, there was a linear relationship between NaCl concentration and reduction of the total yield of pepper. Although the number of marketable fruits was strongly reduced with regard to the total fruit number, the marketable yield did not decrease in the same proportion due to the increase of mean marketable fruit weight. Although salinity also reduced the fruit size, the number of marketable fruits was the more important cause of marketable yield reduction. The climatic conditions of the spring-summer season produced a high incidence of blossom-end rot, this being the main cause of the marketable yield reduction with the saline treatments. The red state of pepper fruits was the most appropriate since these fruits had greater firmness than turning or green fruits when cultivated under moderate salinity, as well as higher total soluble solids values.Additional key words: blossom-end rot, Capsicum annuum, marketable yield, maturity state, total yield. ResumenEfecto de la salinidad en la producción y la calidad de los frutos y de pimiento cultivado en perlita Para determinar el efecto del riego con agua salina (NaCl 15 y 30 mM) en la producción y la calidad de pimiento, se cultivaron en invernadero plantas de pimiento en perlita, un sustrato utilizado comercialmente. Los frutos se cosecharon en tres estados de maduración (verde, en viraje y rojo) y se estudiaron los cambios que tienen lugar durante estos estados de maduración en la calidad del fruto, a fin de encontrar el momento óptimo de recolección. Con estos niveles de salinidad, se encontró una relación linear entre la concentración de NaCl y la reducción de la producción total de pimiento. Mientras que el número de frutos comerciales se redujo drásticamente respecto al número total de frutos, la producción comercial no disminuyó en la misma proporción, debido al aumento del peso medio de frutos comerciales. Aunque la salinidad también redujo el tamaño del fruto, el número de frutos comerciales fue la principal causa de la reducción de la producción comercial. Las condiciones climáticas de primavera-verano produjeron una alta incidencia de pudrición apical, siendo la principal causa de la reducción de la producción comercial con los tratamientos salinos. Bajo condiciones de salinidad, el estado de maduración rojo para los frutos de pimiento fue el más apropiado, ya que estos frutos tuvieron mayor firmeza que los verdes o los que estaban virando, además de mayores valores de sólidos solubles totales.Palabras clave adicionales: Capsicum annu...

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Section: Discussionmentioning

confidence: 48%

The effect of salinity on yield and fruit quality of pepper grown in perlite

Navarro¹,

Garrido

Flores

et al. 2010

Span. j. agric. res.

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“…In fact, the highest yield was obtained in the 3.8-4.1 mS/cm EC range, whereas bell pepper best reacts to 1.5-2.0 mS/cm EC (Tadesse et al 1999) or even up to 3.0 mS/cm EC (Kläring, Cierpinski 1998). Moreover, the cooler climate conditions characterising the harvest time in the spring-autumn cycle allowed the crops for better production performance under 4.1 mS/cm EC, whereas in the warmer spring-summer season the salt concentration exceeding the 3.8 mS/ cm electrical conductivity caused yield decrease.…”

Section: Resultsmentioning

confidence: 97%

“…This result is in agreement with previous investigation in tomato fruits (Adams, Ho 1989), reporting an enhancement in sugar content and titratable acidity as a consequence of salinity increase or water deficit. Conversely, Navarro et al (2006) found a slight decrease of sugar concentration in pepper fruits, which is reportedly a consequence of fruit respiration enhancement caused by the ionic strength rise in the nutrient solution (Tadesse et al 1999).…”

Section: Fruit Quality and Chemical Compositionmentioning

confidence: 97%

Effects of cultural cycle and nutrient solution electrical conductivity on plant growth, yield and fruit quality of 'Friariello' pepper grown in hydroponics

Amalfitano¹,

Vacchio²,

Somma³

et al. 2017

Hortic. Sci.

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Amalfitano C., Del Vacchio L., Somma S., Cuciniello A., Caruso G. (2017) 'Friariello' pepper (Capsicum annuum L.) was grown with nutrient film technique (NFT) in order to evaluate the effects of four nutritive solutions, at electrical conductivities (EC) of 3.5, 3.8, 4.1, 4.4 mS/cm, in two cultural cycles (wintersummer versus spring-autumn) on growth, yield and fruit quality. In the winter-summer cycle, fruit yield was significantly higher than in the spring-autumn one. The 3.8 mS/m EC resulted in the highest yield in the winter-summer crops, whereas the 4.1 mS/m EC was the most effective under the spring-autumn cycle. Water consumption was 34% higher in winter-summer than in spring-autumn season. The 3.8 mS/m EC caused the highest water consumption, whereas a 25% reduction was recorded under 4.4 mS/cm. The macronutrients absorption was the highest with 3.8-4.1 mS/cm EC and the lowest with 3.5 mS/cm. Fruits harvested in late summer and berries obtained under 4.4 mS/cm EC mostly showed the best quality. The fruit ascorbic acid and α-carotene content was higher in late summer than in late spring and all fruit antioxidants attained the highest values with 4.4 mS/cm EC.

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“…Destes resultados, pode-se deduzir que teores de K de 5,0 a 7,0 mmol c dm -3 de solo (Figura 1), que nesse trabalho corresponderam a uma saturação de K de 5,3 e 6,6% (Figura 2), não devem ser ultrapassados, quando se deseja cultivar pimentão no solo sob condições protegidas, pois a lixiviação é menor que em condições normais, ocorrendo acúmulo de sais. A salinização do solo vem acontecendo com freqüência sob cultivo em ambiente protegido (Tadesse et al, 1999;Richter et al, 1999).…”

Section: Resultsunclassified

Características químicas de um latossolo adubado com uréia e cloreto de potássio em ambiente protegido

Silva¹,

Boaretto

Fernandes

et al. 2001

Sci. agric. (Piracicaba, Braz.)

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*Autor correspondente RESUMO: A produção de vegetais mais sadios e de boa qualidade e o fornecimento contínuo no mercado são fatores que têm determinado a adoção do sistema de cultivo protegido por um número maior de produtores. Porém, devido ao pouco conhecimento sobre o manejo do solo nessas condições, tem-se aplicado altas doses de fertilizantes, ocasionando problemas de salinidade e desequilíbrio nutricional. O objetivo desse trabalho foi avaliar os efeitos da aplicação da uréia e do cloreto de potássio nas características químicas de um LATOSSOLO VERMELHO Destrófico, principalmente nos índices de acidez e saturação em potássio. O N e o K foram aplicados em cobertura, nas doses equivalentes de 13,3 e 39,9 g m -2 de N e 5,5 e 16,6 g m -2 de K, em esquema fatorial (2x2+1), com tratamento adicional, sem a aplicação dos nutrientes. Cultivou-se pimentão, cultivar Mayata, em condições de ambiente protegido, durante 34 semanas. Após o pegamento das mudas, foi aplicado 1/6 dos nutrientes a cada dez dias. Ao final do ciclo, as formas de N nítrico e N amoniacal representaram melhor as doses do nutriente aplicados ao solo e não houve acidificação. As raízes tiveram significativo crescimento após a aplicação de N, enquanto que o aumento da dose de K, aplicado como KCl, prejudicou o crescimento radicular, provavelmente associado à alta concentração de K no solo e possíveis efeitos salinos, correspondendo a mais de 5,0 mmol c dm -3 e mais que 5,3% de saturação do K no complexo de troca, na camada superficial do solo. Palavras-chave: Capsicum annuum, adubação nitrogenada, adubação potássica, saturação de potássio CHEMICAL CHARACTERISTICS OF AN OXISOL AFTER UREA AND POTASSIUM CHLORIDE FERTILIZATION IN A PROTECTED ENVIRONMENTABSTRACT: The production of healthy, high quality vegetables and the development of technologies for continuous supply to the market are important factors determining the adaption of protected cultivation systems by an increasing number of growers. Due to the little knowledge on soil management practices under these conditions, high fertilizer rates are normally applied, causing salinity problems and nutricional unbalances. The objective of this paper was to evaluate the effects of urea and potassium chloride applications on the chemical characteristics of an Eutrorthox, mainly on its acidity and potassium saturation. The N was applied in rates of 13.3 and 39.9g m -2 and the K in rates 5.5 and 16.6 g m -2 , in a fatorial (2X2+1) design, including a control. Pepper plants (Capsicum annuum, Mayata cultivar) were grown under protected condition, during 34 weeks. After seedling rooting, the nutrients were applied at the rate of one sixth of the total at ten day intervals, up to 60 days. It was observed that urea did not acidify the soil probabily due to its high buffering capacity. The nitric and ammoniacal forms of N were directly effeted by the N rates applied in relation to the soil. In the treatment with N, the roots showed better development compared to the control. However, the highes...

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Nutrient conductivity effects on sweet pepper plants grown using a nutrient film technique

Cited by 32 publications

References 29 publications

The effect of salinity on yield and fruit quality of pepper grown in perlite

The effect of salinity on yield and fruit quality of pepper grown in perlite

Effects of cultural cycle and nutrient solution electrical conductivity on plant growth, yield and fruit quality of 'Friariello' pepper grown in hydroponics

Características químicas de um latossolo adubado com uréia e cloreto de potássio em ambiente protegido

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