Effect of gibberellic acid and urea on the growth of pineapple fruit (Ananas comosus (L.) Merr.)

Effects of gibberellic acid (GA3) and urea on Queen pineapples (Ananas comosus (L.) Merr.) growth in the field were discussed in this study. Pineapples were sprayed with GA3 (at the concentration of 1, 5, 10, 20, 40, 60, 80 and 100 mg.L-1) or urea (at the concentration of 1, 5, 10, 15, 20, 25 and 30 g.L-1) on day 0 and day 3 at the beginning of growth period (50% dried flowers). Fruits were sampled every 15 days from day 0 to day 75 for assessment on fruit weight, fruit size, and fruit quality. Besides, fruits (which were sprayed with GA3 at the concentration of 40 mg.L-1 or urea at the concentration of 15 g.L-1) were sampled on the 15th day from the day which processed to determine the size of cells. The results showed that the treatments with four highest concentration of GA3 (40, 60, 80 and 100 mg.L-1) or urea (15, 20, 25 and 30 g.L-1) significantly increased fruit weights and fruit sizes. In addition, the treatments of GA3 in high concentration (40 - 100 mg.L-1) stimulated the increase of sugar content and vitamin C content in the fruit flesh compared to the control. The treatments of urea at different concentrations did not alter the fruit quality index. Exogenous GA3 at the concentration of 40 mg.L-1 or urea at the concentration of 15 g.L-1 stimulated the increase of fruit weight without decreasing the fruit quality. In which, exogenous GA3 at concentration 40 mg.L-1 increased the fruit weight by enlarging flesh cell.

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Organo-Mineral Fertilization Enhances the Acceptability of Smooth Cayenne Pineapple Fruit (Ananas comosus (L.) Merrill) for European Export and Domestic Consumption in Benin

Agriculture ◽

10.3390/agriculture9030065 ◽

2019 ◽

Vol 9 (3) ◽

pp. 65

Author(s):

Elvire Sossa ◽

Codjo Agbangba ◽

Gustave Dagbenonbakin ◽

Roméo Tohoun ◽

Pierre Tovihoudji ◽

...

Keyword(s):

Fruit Quality ◽

Mineral Fertilizer ◽

Fruit Weight ◽

Soluble Solids ◽

Ananas Comosus ◽

Mineral Fertilization ◽

Domestic Consumption ◽

Pineapple Fruit ◽

European Standards ◽

European Export

Heterogeneity in pineapple fruit quality explains the low export volume of fruits from Benin to the international market. This work aims to investigate influences of organo-mineral fertilizer on a) pineapple fruit yield, b) fruit quality and the proportion of fruits meeting European export standards, and c) fresh fruit acceptability for domestic consumption. The experimental design is a split-plot with three replications where the main factor is organic manure (poultry litter) (P0 = 0 t ha−1, P1 = 5 t ha−1, P2 = 10 t ha−1) and the sub-plot factor, N-P-K fertilization in kg ha−1 (T0:100-30-150, T1: 200-60-300, T2: 400-120-600, and T3: 600-180-900). To evaluate the percentage of fruit meeting European standards, a generalized linear model with binomial error structures was used. A sensorial test was carried out on fresh pulp to assess the preference of fruit meeting domestic criterion. A preference mapping was assessed through an acceptability test with a nine-point hedonic scale. Organo-mineral fertilizer significantly improved fruit weight (p = 0.012), fresh juice weight (p = 0.042), total soluble solids (p = 0.032), and the percentage of fruits meeting European standards (p < 0.001). Better fruits meeting export standards were found with treatments P1T1, P2T0, and P2T3 (83.33 ± 28.87%). Fruits from treatments P0T2, P2T1, P1T3, and P2T2 were highly accepted for domestic consumption (70%). The results suggested that organo-fertilizer producing fruit achieving exportation standards may differ from those satisfying domestic preferences. Moreover, the findings suggested that the ratio crown length: fruit length, which is a key ratio for exportation standards, is not related to physico-chemical quality. Finally, the findings have implications for the sustainability of pineapple production for domestic and exportation purposes.

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Ammonium thiosulfate and 6-benzyladenine improve the crop load and fruit quality of 'Delicious' apples

Australian Journal of Experimental Agriculture ◽

10.1071/ea05217 ◽

2007 ◽

Vol 47 (5) ◽

pp. 635 ◽

Cited By ~ 7

Author(s):

S. A. Bound ◽

S. J. Wilson

Keyword(s):

Fruit Quality ◽

Positive Relationship ◽

Sugar Content ◽

Fruit Size ◽

Fruit Weight ◽

Fruit Firmness ◽

Single Application ◽

Crop Load ◽

Ammonium Thiosulfate

Four trials were conducted over 3 years to assess the effect of ammonium thiosulfate (ATS) as a blossom thinner of ‘Delicious’ apple trees. In addition to determining the optimal concentration of ATS and the effectiveness of multiple applications, the effect on fruit quality was assessed. A program using ATS at bloom and 6-benzyladenine (BA) applied postbloom was examined. Multiple applications of ATS reduced crop load more than a single application. A concentration of 1.0% (v/v, 5800 mg/L) applied twice during the flowering period is recommended, with the first application at 20% bloom and the second at 80% bloom. Fruit firmness and sugar content were increased by ATS, and a positive relationship between fruit weight and sugar content and between fruit weight and firmness was demonstrated. ATS can also be effectively combined in a program with BA with the added benefits of increases in fruit size, firmness and sugar content; however, caution is advised to prevent over-thinning.

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Analysis of pomological traits in new promising sweet cherry genotypes

Genetika ◽

10.2298/gensr1303873a ◽

2013 ◽

Vol 45 (3) ◽

pp. 873-880 ◽

Cited By ~ 5

Author(s):

Milica Fotiric-Aksic ◽

Tihomir Nikolic

Keyword(s):

Sweet Cherry ◽

Sugar Content ◽

Fruit Size ◽

Fruit Weight ◽

Solid Content ◽

Soluble Solid Content ◽

Fresh Market ◽

Total Sugar Content ◽

Ripening Time ◽

Chemical Content

Sweet cherry breeding programs are interested in developing new cultivars that are very early or very late in ripening, high yielding, with excellent fruit size and quality. The aim of this study was to evaluate new, promising, sweet cherry genotypes (G-1 and G-2) for ripening time, fruit morphology and fruit chemical content, and compare it with the standard sweet cherry cultivars (Bigarreau Jaboulay, B. H. Burlat, Seneca, Hedelfiger Riesenkirsche, Germersdorfer Grosse Kirsche, Emperor Francis and Bing). Experiment was done during four consecutive years (2006-2009) in Grocka, near Belgrade. The earliest fruit ripening was recorded in G-2 (22nd April) while the latest in `Bing` (2nd June). Fruit weight varied from 5.83 g (G-2) up to 8.93 g (G-1). Soluble solid content and total sugar content were the lowest in genotype G-2 (10.48%; 8.45%, respectively) but the highest in Emperor Francis (18.28%; 15.98%, respectively). No matter the fact that some standard cultivars showed better results for some traits, genotypes G-1 and G-2 are considered very promising. So, genotype G-1 could be intended for table consumption since it ripens 2-3 days after cv. B. H. Burlat, but have much higher fruit weight. Also, genotype G-2, the earliest in this trial, showed satisfactory fruit weight for this ripening time, which makes it very interesting for fresh market production.

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Growth and Comprehensive Quality Index of Tomato under Rain Shelters in Response to Different Irrigation and Drainage Treatments

The Scientific World JOURNAL ◽

10.1155/2014/457937 ◽

2014 ◽

Vol 2014 ◽

pp. 1-12 ◽

Cited By ~ 6

Author(s):

Guang-cheng Shao ◽

Ming-hui Wang ◽

Na Liu ◽

Min Yuan ◽

Prem Kumar ◽

...

Keyword(s):

Fruit Quality ◽

Quality Index ◽

Soluble Sugar ◽

Principal Component ◽

Fruit Weight ◽

Soluble Solids ◽

Root Weight ◽

Drought Treatment ◽

Soil Desiccation ◽

Underground Pipe

The effects of two levels of irrigation water (100%, 60%) and buried underground pipe depths (0.8 m, 0.6 m) under rain shelters’ conditions on yield and some quality parameters of tomato were investigated. A fully randomized factorial experiment was conducted between April and August in 2011 and 2012 at Hohai University. It was found that drainage treatments enhanced biomass production, whereas soil desiccation led to biomass reduction. At 60 cm buried underground pipe depths, the drought treatments increased the mean root weight and root-shoot ratio by 14% and 39%, respectively. The main effects of drainage treatments on the fruit quality were increases in total soluble solids (TSS), soluble sugar (SS), and vitamin C (VC) compared to the control. In addition, drainage treatments increased the average yield by 13% and 9%, respectively, in both years. The drought treatments did not significantly alter fruit yield, although mean single fruit weight was slightly reduced. Instead, these treatments tend to have great potential to improve fruit quality (TSS, SS, and VC) to variable extents. In both years, the drought treatment at 60 cm buried underground pipe depths proved to possess the highest comprehensive quality index based on Principal Component Analysis.

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Study on the effect of DA-6 on the maturity and fruit quality of ‘Aikansui’ pear

E3S Web of Conferences ◽

10.1051/e3sconf/202016503061 ◽

2020 ◽

Vol 165 ◽

pp. 03061

Author(s):

Huiyi Zhang ◽

Huizhi Li ◽

Huaer Wang ◽

Changwen Duan ◽

Haonan Zhang ◽

...

Keyword(s):

Fruit Quality ◽

Sugar Content ◽

Fruit Weight ◽

Titratable Acid ◽

Effect Of Treatment

The effect of DA-6 treatments with different concentrations on the maturity and fruit quality of ‘Aikansui’ pear was studied. The results showed that the effect of treatment at 35 mg •L-1 was the best, followed by 30 mg •L-1. The treatment of 35 mg •L-1 could increase the sugar content of the fruit, reduce the content of titratable acid, and advance the maturity of the fruit to the greatest extent. The 30 mg •L-1 treatment had the most significant effect on the increase of fruit weight and the Vc content.

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INFLUENCES OF LATENT VIRUSES ON VIGOR, YIELD AND QUALITY OF BRITISH SOVEREIGN STRAWBERRIES

Canadian Journal of Plant Science ◽

10.4141/cjps62-103 ◽

1962 ◽

Vol 42 (4) ◽

pp. 602-610 ◽

Cited By ~ 10

Author(s):

Jack A. Freeman ◽

Frances C. Mellor

Keyword(s):

Virus Infection ◽

Fruit Quality ◽

Sugar Content ◽

Fruit Size ◽

Reduce Sugar Content ◽

Total Acid ◽

Yield And Quality ◽

Reduce Sugar ◽

The Hill

Comparison of the effect of two strains of mottle virus, two strains of veinbanding virus, and latent-A virus, alone and in combination, on vigor, yield and quality of British Sovereign strawberry plants grown under two planting systems showed: 1. Vigor was reduced by infection by a single virus and still further reduced by two viruses; 2. Yield was reduced by virus infection, especially during the first fruiting year when plants were grown under the hill system; 3. Fruit size was reduced only by virus combinations; 4. Fruit quality was affected only by veinbanding, which increased the total acid content and tended to reduce sugar content.

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Weather Affects Seedless Watermelon Yield, But Not Fruit Size or Quality

HortScience ◽

10.21273/hortsci.39.4.748e ◽

2004 ◽

Vol 39 (4) ◽

pp. 748E-748 ◽

Cited By ~ 1

Author(s):

Timothy E. Elkner* ◽

David H. Johnson

Keyword(s):

Fruit Quality ◽

Total Yield ◽

Fruit Size ◽

Fruit Weight ◽

Soluble Solids ◽

Fruit Number ◽

Seedless Watermelon

Medium-sized triploid watermelons were evaluated in southeast Pennsylvania in 2002 and 2003 to determine the best adapted cultivars for this region. The 2002 season was unusually hot and dry, while 2003 was unusually cool and wet. Yields and fruit quality were compared for the eight cultivars that were grown both seasons to determine the effect of weather on seedless watermelon. Cooler temperatures reduced total fruit number and total yield but not average fruit weight or soluble solids. Researchers evaluating triploid watermelons over several seasons can compare size and °Brix among cultivars, but will need to be cautious when predicting total yields.

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Influences of girdling and potassium treatments on fruit quality and some physiological characters of ‘Fremont’ mandarin variety

Folia Horticulturae ◽

10.2478/fhort-2021-0015 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Tuğba Ülker ◽

Müge Uysal Kamiloğlu

Keyword(s):

Fruit Quality ◽

Sugar Content ◽

Chlorophyll Concentration ◽

Fruit Size ◽

Potassium Nitrate ◽

Leaf Nitrogen ◽

Fruit Yield ◽

Leaf Nitrogen Content ◽

Total Sugar Content ◽

N Concentration

Abstract Growing citrus involves cultural treatments such as girdling and foliar potassium treatment to increase fruit size, yield and quality. The aim of the study was to evaluate the effects of single and double stem girdling, potassium nitrate (KNO3) treatment on leaves and combinations of these treatments on the fruit yield, size and quality characteristics, leaf chlorophyll concentration and leaf nitrogen content, leaf fluorescence (PSII) and leaf sugar content of the ‘Fremont’ mandarin variety. Girdling treatments were applied on the stem by removing 4 mm wide ring of bark at the end of anthesis and after the June fruit drop. Foliar KNO3 applications were applied at a concentration of 4% twice (90 days and 120 days after full anthesis) in the experiment. The single girdling (SG) and double girdling (DG) treatments on stems increased fruit yield (kg · tree−1) by approximately 40% relative to the control (C). Treatments did not significantly affect the internal fruit quality of the ‘Fremont’ mandarin variety except in fruit colour and appearance. The highest impact on fruit size was found in the DG + KNO3 treatment. According to treatments and periods, the SPAD values varied between 62.08 and 70.67, whereas the PSII values varied between 0.698 and 0.756. The treatments significantly increased the leaf nitrogen (N) concentration and the fructose, glucose and sucrose concentrations relative to the control. The highest N concentration content was detected in the foliar potassium treatment, and the highest total sugar content was detected in the SG treatment.

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QUALIDADE E PRODUTIVIDADE DE FRUTOS DE FIGO CULTIVADO EM TRÊS DENSIDADES DE PLANTIO

Colloquium Agrariae ◽

10.5747/ca.2018.v14.n4.a260 ◽

2018 ◽

Vol 14 (4) ◽

pp. 161-166

Author(s):

Scheila Lucia Ecker ◽

Clevison Luiz Giacobbo ◽

Leandro Galon ◽

Adriana Lugaresi ◽

Gian Carlos Girardi

Keyword(s):

Fruit Quality ◽

Dry Matter ◽

Fruit Size ◽

Dry Mass ◽

Fruit Weight ◽

Soluble Solids ◽

Planting Density ◽

Significant Difference ◽

Fig Tree

The objective of this work was to verify the influence of planting density on productivity and fruit quality of the fig tree. The design was used in three blocks, the plants of the cultivar Roxo de Valinhos were submitted to three planting spacings: 5 x 0.5 m; 5 x 1.0 m; and 5 x 1.5 m. The evaluated characteristics were: length of branches; average weekly growth of branches; fruit size; average fruit weight;soluble solids (°Brix); yield of mature fruits; productivity of green fruits; accumulated productivity; and dry mass of fruits.The length of the branches was not influenced by planting spacing, the plants conducted at lower densities presented higher productivity, both of green fruits and accumulated productivity.Plants submitted to lower planting density produced fruits with higher dry matter, but these were smaller in size, but without significant difference for those submitted to lower density. It wasconcluded that productivity is directly affected by fig planting density, but not all the qualitative aspects of the fruits were affected.

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Effects of Irrigation on Wine Grape Growth and Fruit Quality

HortTechnology ◽

10.21273/horttech.10.1.162 ◽

2000 ◽

Vol 10 (1) ◽

pp. 162-168 ◽

Cited By ~ 8

Author(s):

Richard Allen Hamman ◽

Imed Eddine Dami

Keyword(s):

Soil Moisture ◽

Fruit Quality ◽

Cold Hardiness ◽

Sugar Content ◽

Soluble Sugar ◽

Irrigation Management ◽

Management Strategies ◽

Field Studies ◽

Fruit Weight ◽

Wine Quality

Field studies were conducted to determine the effect of three drip irrigation regimes on grapevine growth, juice and wine quality, soil moisture, cold hardiness of bud and cane tissues and soluble sugar content of cortical cane tissues of Vitis vinifera, Linnaeus `Cabernet Sauvignon'. This study was developed to help provide some irrigation management strategies that would improve fruit quality and reduce excessive vigor. Irrigation treatments of 192, 96, and 48 L (51, 25, and 13 gal) per vine per week were initiated at bud break until veraison (initiation of berry color) and then reduced by 25% through harvest. Significant differences of fruit weight per vine, crop load, soil moisture, average berry and cluster weight, shoot length and pruning weight per meter of canopy row were observed among treatments. Juice and wine compositions and wine color were also significantly different; however, cold hardiness and soluble sugar contents did not differ between treatments.

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