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

2017 ◽  
Vol 44 (No. 2) ◽  
pp. 91-98 ◽  
Author(s):  
Amalfitano Carmine ◽  
Vacchio Laura Del ◽  
Somma Silvano ◽  
Cuciniello Antonio ◽  
Caruso Gianluca

‘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 (winter-summer 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.

Irriga ◽  
2019 ◽  
Vol 24 (1) ◽  
pp. 86-97 ◽  
Author(s):  
Francisco José Nunes Modesto ◽  
Maria Ângela Cruz Macêdo Dos Santos ◽  
Tales Miler Soares ◽  
Ellen Paula Menezes Dos Santos

CRESCIMENTO, PRODUÇÃO E CONSUMO HÍDRICO DO QUIABEIRO SUBMETIDO À SALINIDADE EM CONDIÇÕES HIDROPÔNICAS     FRANCISCO JOSÉ NUNES MODESTO1; MARIA ÂNGELA CRUZ MACÊDO DOS SANTOS1; TALES MILER SOARES2 E ELLEN PAULA MENEZES DOS SANTOS3   1 Engenheiro Agrônomo, Mestre em Engenharia Agrícola, Universidade Federal do Recôncavo da Bahia, Núcleo de Engenharia de Água e Solo, Rua Rui Barbosa, S/N, Cruz das Almas-BA, CEP 44.380-000, e-mail: [email protected]; [email protected] 2 Engenheiro Agrônomo, Prof. Doutor, Universidade Federal do Recôncavo da Bahia, Núcleo de Engenharia de Água e Solo, Rua Rui Barbosa, S/N, Cruz das Almas-BA, CEP 44.380-000, e-mail: [email protected] 3 Graduanda em Engenharia Agronômica na Universidade Federal do Recôncavo da Bahia, Núcleo de Engenharia de Água e Solo, Rua Rui Barbosa, S/N, Cruz das Almas-BA, CEP 44.380-000, e-mail: [email protected]     1 RESUMO   Pesquisas têm sido conduzidas com uso de águas salobras em cultivos hidropônicos e são estratégicas para o aproveitamento racional dessas águas. Nesse contexto surge o interesse em se pesquisar culturas que estão na demanda dos consumidores, como é o caso do quiabeiro. Objetivou-se com o presente trabalho analisar o consumo hídrico, o crescimento, a produção e a qualidade do quiabeiro, submetido a diferentes níveis de condutividade elétrica em sistema hidropônico. O quiabeiro foi submetido a sete níveis de condutividade elétrica da solução nutritiva (CEsol 2,08; 4,47; 7,90; 9,46; 12,84; 14,82; 18,61 dS m-1). Aos 85 dias após o transplantio foi avaliado o consumo hídrico, eficiência do uso da água (EUA), o crescimento vegetativo, a produção, a qualidade do fruto e o índice de tolerância do quiabeiro. Para a determinação da tolerância à salinidade foi utilizado, dentre outros, o modelo de platô com redução exponencial. A área foliar e o número de folhas foram as variáveis do crescimento mais afetadas com o incremento da CEsol. A EUA teve seu máximo de 7,81 Kg m-3 para a CEsol de 7,08 dS m-1. A salinidade limiar encontrada foi de 5,43 dS m-1. O aumento da CEsol até 18,61 dS m-1 não afetou a qualidade do fruto.   PALAVRAS CHAVE: Condutividade elétrica, Abelmoschus esculentus L. (Moench), qualidade da água, cultivo hidropônico.     MODESTO, F. J. N.; SANTOS, M. A. C. M. dos; SOARES, T. M.; SANTOS, E. P. M. dos GROWTH, PRODUCTION AND WATER CONSUMPTION OF  OKRA SUBJECTED TO SALINITY UNDER HYDROPONIC CONDITIONS     2 ABSTRACT   Researches have been conducted using brackish water in hydroponic crops and are strategic for the rational use of these waters. In this context the interest arises in researching cultures that are in the demand of the consumers as it is the case of the okra. The objective of this work was to analyze  water consumption, growth, production and quality of  okra submitted to different levels of electrical conductivity in a hydroponic system. Okra trees were submitted to seven levels of electrical conductivity of the nutrient solution (ECsol 2.08, 4.47, 7.90, 9.46, 12.84, 14.82, 18.61 dS m-1). At 85 days after transplanting, water consumption, water use efficiency (WUE), vegetative growth, yield, fruit quality and tolerance index of okra were evaluated. For determination of tolerance to salinity was used, among models, the plateau model with exponential reduction. Leaf area and number of leaves were the growth variables most affected with the increment of ECsol.  WUE had its maximum of 7.81 kg m-3 for ECsol of 7.08 dS m-1. Threshold salinity found was 5.43 dS m-1. ECsol increase up to 18.61 dS m-1 did not affect fruit quality.   Keywords: Eletrical conductivity, Abelmoschus esculentus L. (Moench), water quality, soilless cultivation.


Author(s):  
Thejangulie Angami ◽  
Homeswar Kalita ◽  
Jitendra Kumar ◽  
D. Ramajayam ◽  
Raghuveer Singh ◽  
...  

A field experiment was executed during 2013-16 at ICAR Research Farm, Gori, ICAR (Research Complex) for NEH Region, Arunachal Pradesh Centre, Basar to find out the optimum planting time for yield and quality attributes of Grand Naine banana. The experiment was laid out in RBD having five treatments with four replications. The study divulged that the planting dates had a significant influence on growth, yield and fruit quality of banana. Fruits harvested from mid-may planting recorded the highest in yield based parameters viz. number of hands per bunch (13.17), number of fingers per bunch (162.63) and bunch weight (24.67 kg) respectively. However, fruits from mid-june planting exhibited the highest finger weight (148.67 g) which was statistically at par with mid-may planting (147.54 g). It was noted that plants of mid-june planting produced the maximum number of functional leaves at the shooting stage (15.38) which was found at par with mid-may planting (15.13).The fruit quality attributes like sugars, ascorbic acid, acidity were also influenced by planting times whereas it had no significant effect on TSS content of the fruits. Fruits from mid-may plant recorded the highest TSS (21.03°Brix), minimum acidity (0.23%) and highest ascorbic acid content (14.99 mg per 100 g) followed by mid-june planting with TSS, acidity and ascorbic acid content of (20.56°Brix), (0.24%) and (14.47 mg per 100 g) respectively. Starch content was found maximum in fruits from mid-august planting (2.08%) whereas, minimum starch content was recorded in fruits from mid-june planting (0.71%) inferring that mid-may is the optimum time for planting for Grand Naine variety of banana under subtropical mid-hill conditions of Arunachal Pradesh justifying future actions in the expansion of planting.


2021 ◽  
pp. 1-8
Author(s):  
A. Alharbi ◽  
O. Babiker ◽  
J. Campen ◽  
M.E. Abdelaziz ◽  
F. de Zwart ◽  
...  

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1320
Author(s):  
Liza Nuriati Lim Kim Choo ◽  
Osumanu Haruna Ahmed ◽  
Shaidatul Azdawiyah Abdul Talib ◽  
Mohamad Zabawi Abdul Ghani ◽  
Shamsiah Sekot

Papaya cultivation on nutrient deficient acidic peat soils causes poor growth, yield, and fruit quality of this crop. Alkalinity and the high affinity of clinoptilolite zeolite (CZ) for macronutrients could improve pH, nutrient availability, and papaya productivity on peat soils. A one-year field experiment was conducted to determine the effects of CZ on: (i) soil ammonium, nitrate, P, and K, and (ii) growth, yield, and fruit quality of papaya grown on a peat soil. Treatments evaluated were: (i) different amounts of CZ (25%, 50%, 70%, and 100% of the existing recommended rate of CZ) + NPK fertilizer, and (ii) NPK fertilizer alone. The peat soils with CZ improved pH, ammonium, nitrate, P, and K availability because of the sorption of these nutrients within the structured framework of the CZ. Co-applying CZ (70% to 100%) and NPK fertilizers improved the NPK contents in papaya leaves and the growth, yield, and fruit quality of papaya because of the significant availability of ammonium, nitrate, P, and K in the peat soil for their optimum uptake by the papaya plants. Ability of CZ to buffer the soil pH reduced the need for liming. It is possible to use CZ to improve papaya productivity because CZ can regulate nutrient availability.


2017 ◽  
Vol 102 ◽  
pp. 25-31 ◽  
Author(s):  
A.M. Papadaki ◽  
F.A. Bletsos ◽  
I.G. Eleftherohorinos ◽  
G. Menexes ◽  
A.L. Lagopodi

2021 ◽  
Vol 12 (3) ◽  
pp. 193-199
Author(s):  
R. F. Mohamed ◽  
A. A. R. Atawia ◽  
H. E. M. EL-Badawy ◽  
A. M. Abd- Al-Rahman ◽  
S. F. EL-Gioushy

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