scholarly journals Mineral and organomineral fertirrigation in relation to quality of greenhouse cultivated melon

2003 ◽  
Vol 60 (1) ◽  
pp. 149-154 ◽  
Author(s):  
André Luís Teixeira Fernandes ◽  
Guilherme Pádua Rodrigues ◽  
Roberto Testezlaf
Keyword(s):  
Organic Fertilizer ◽  
Fertilizer Application ◽  
Chemical Fertilizer ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Chemical Products ◽  
Solids Content ◽  
Daily Application

Fertirrigation of melon still presents problems in relation to the type of the fertilizer used, mainly the biofertilizers. This experiment, installed in Uberaba, MG, Brazil, in a plastic module greenhouse of 768 m², tested treatments consisting of the conventional mineral fertirrigation and the organic fertirrigation, using two frequencies: daily and weekly. The best yields were obtained with daily fertilizer application, with superiority in relation to biofertilizers, with yield of 45.5 t ha-1 of fruit. This value was higher as compared to chemical products, that lead to a yield of 42.4 t ha-1. The weekly fertigation had lower productivities, and in this case, the biofertilizers also overcame the mineral, on the average 2.0 t ha-1. The best melon soluble solids values were obtained for the daily application of fertilizers, and the best treatment (P < 0.05) was the organic daily fertigation, with values of soluble solids content of 13.60° brix, followed by the daily chemical fertigation, with values of 12.52°. On the average, the amounts of soluble solids in melon were superior to the average found for Brazilian melons. Differences were not verified among the treatments for the variables pulp thickness and fruits pH. Regarding the peel thickness, the application of organic fertilizer sources presented a slight superiority in relation to chemical fertilizer treatments. No differences were verified among treatments in relation to the amount of fruits protein.

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest Term

2009 ◽  
Vol 70 (1) ◽  
pp. 135-144 ◽  
Author(s):  
Marek Gajewski ◽  
Zenon Węglarz ◽  
Anna Sereda ◽  
Marta Bajer ◽  
Agnieszka Kuczkowska ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Carrot Juice ◽  
Harvest Time ◽  
Experimental Station ◽  
Colour Parameters ◽  
Solids Content ◽  
Nitrates Content

Quality of Carrots Grown for Processing as Affected by Nitrogen Fertilization and Harvest TermIn 2007-2008 the effect of nitrogen fertilization and harvest term on quality of two carrot cultivars was investigated. The field experiment was carried out in Żelazna Experimental Station of Warsaw University of Life Sciences. Karotan F1and Trafford F1cultivars, commonly grown for juice industry, were the objects of the experiment. Carrot seeds were sown at the beginning of May. Nitrogen fertilization was applied in five rates, ranged from 0 to 120 kg·ha-1and in two terms — before sowing and in the middle of growing season. Roots were harvested in three terms: mid-September, mid-October and the first decade of November. After harvest there were determined: nitrates (NO3) content in carrot roots and juice, soluble solids, colour parameters of juice in CIE L*a*b*system. The dose and the term of nitrogen fertilization influenced nitrates content in carrots, and the highest NO3concentration was found in carrots fertilized with 120 kg·ha-1of N before sowing. Karotan showed higher nitrates accumulation than Trafford. The content of nitrates in the roots was markedly higher than in carrot juice. Nitrates content in carrots decreased with delaying of harvest time, in opposite to soluble solids content. Soluble solids content and colour parameters of carrot juice were not affected by nitrogen fertilization, but the lowest L*, a*and b*values were observed at the last term of harvest.

scholarly journals Quality of strawberries subjected to pre-harvest UV-C radiation

2021 ◽  
Vol 56 ◽  
Author(s):  
Izabel Camacho Nardello ◽  
Rufino Fernando Flores Cantillano ◽  
Jardel Araújo Ribeiro ◽  
Gerson Kleinick Vignolo ◽  
Marcelo Barbosa Malgarim ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Experimental Design ◽  
Vitamin C ◽  
Fragaria X Ananassa ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Single Factor ◽  
Solids Content ◽  
Uv C

Abstract The objective of this work was to evaluate the influence of the use of UV-C radiation at an intensity of 0.53 KJ m-2, during strawberry (Fragaria x ananassa) cultivation, on the physicochemical and phytochemical parameters of the fruits. The used experimental design was completely randomized, in a single-factor arrangement with 11, 19, 29, and 39 UV-C applications and without UV-C application. The hue of the fruits was smaller at the end of the study period. pH varied in strawberries that received 39 applications of UV-C, and the soluble solids content differed with 19 applications. Antioxidant activity was lower in fruits with 11, 19, and 29 UV-C applications, whereas vitamin C content was lower only in fruits that received 29 applications. The use of UV-C radiation at an intensity of 0.53 KJ m-2, during strawberry cultivation, affects the physicochemical and phytochemical parameters of the fruits, but does not cause losses in their quality.

scholarly journals The Quality of Superior Seedless Bunches during Shelf Life as Determined by Growth on Different Rootstocks

Agriculture ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 990
Author(s):  
A. A. Lo’ay ◽  
Hamed Ismail ◽  
Hazem S. Kassem
Keyword(s):  
Shelf Life ◽  
Soluble Solids ◽  
Ion Leakage ◽  
Soluble Solids Content ◽  
Close Attention ◽  
Oxidative Reactions ◽  
Seedless Grape ◽  
Metabolism Enzyme ◽  
Solids Content

Vineyard rootstocks are an important tool in the local and international market for growing the Superior Seedless grape cultivar, which is highly favored by customers. As a result, it is vital to pay close attention to the quality of clusters during handling. The current study aimed to determine whether Superior Seedless vines can be grown on specific rootstocks, resulting in higher quality during shelf life. Vines of the Superior Seedless vine cultivar that were used were 13 years old and had been grown on sandy soil. These vines were grafted onto four different rootstocks (genotypes), namely Freedom, 1103 Paulsen, SO4, and Own Root. The soluble solids content (SSC%) was selected as 16%. Bunches were subsequently stored in the lab at 27 ± 1 °C with 57 ± 3% air relative humidity for three days. Rootstock 1103 Paulsen’s quality was found to be superior to that of the other rootstocks, according to the results of the study. Rootstock 1103 Paulsen maintained its ascorbic acid (AA) content, which is reflected in its antioxidant capacity, according to the results. In addition, lipid peroxidation accumulation and ion leakage percentages indicated that oxidative reactions were at their lowest levels. The results show that 1103 Paulsen decreases cellular metabolism enzyme activities at the shelf life level and improves the bunch quality of Superior Seedless (scion) grapes within 4 days of application. As a whole, the results show that the 1103 Paulsen rootstock produces Superior Seedless bunches of a high quality that is preserved throughout the shelf life period.

scholarly journals Fruit Abscission and Fruit Quality of Apples Following Use of Dicamba to Control Preharvest Drop

1990 ◽  
Vol 115 (3) ◽  
pp. 390-394 ◽  
Author(s):  
Richard P. Marini ◽  
Ross E. Byers ◽  
Donald L. Sowers ◽  
Rodney W. Young
Keyword(s):  
Fruit Quality ◽  
Starch Content ◽  
Soluble Solids ◽  
Naphthaleneacetic Acid ◽  
Soluble Solids Content ◽  
Fruit Abscission ◽  
Fruit Drop ◽  
Solids Content ◽  
Methoxybenzoic Acid

Five apple (Malus domestica Borkh.) cultivars were treated with dicamba at concentrations of 0 to 200 mg·liter-1 during 3 years. Although the response varied with cultivar, dose, and year, dicamba always delayed fruit abscission. At similar concentrations, dicamba usually reduced fruit drop more than NAA, but less than fenoprop. Dicamba at 10 mg·liter-1 effectively delayed drop of `Delicious', whereas 20 to 30 mg·liter-1 was required for `Red Yorking', `Rome', `Winesap', and `Stayman'. Dicamba did not influence flesh firmness, soluble solids content, water core, or starch content at harvest or after storage. Chemical names used: naphthaleneacetic acid (NAA); 2-(2,4,5-trichlorophenoxy)propionic acid (fenoprop); 3,6dichloro-2-methoxybenzoic acid (dicamba).

scholarly journals Postharvest durability of tomatoes with PVA covering

2020 ◽  
Vol 38 (2) ◽  
pp. 160-165
Author(s):  
Manuella Candéo ◽  
Maria Helene G Canteri ◽  
Dayana Carla de Macedo ◽  
Evaldo T Kubaski ◽  
Sergio M Tebcherani
Keyword(s):  
Mass Loss ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Soluble Solids Content ◽  
Total Soluble Solids ◽  
Red Color ◽  
Solids Content ◽  
Alternative Solutions

ABSTRACT Plastic packaging from petroleum derives used in the food industry represents serious environmental problems. Alternative solutions to these problems consist of the development of biodegradable packaging, such as films and edible coatings including the polyvinyl alcohol (PVA). In this research we evaluated the effect of the PVA application by two different techniques aiming to increase shelf life of ripe tomatoes, cultivar Carmen. The methodology of this study consisted in covering tomatoes with a PVA solution and also with PVA impregnated tracing paper. The different fruit lots were kept in polystyrene trays for 19 days on a laboratory bench at a controlled temperature of 25±3ºC. The fruit analyzes were compared to the control fruits without any treatment, being evaluated firmness, pH, titratable total acidity, mass loss, total soluble solids content, water activity and color determination of fruit surface. Among the different treatments, the PVA coating applied directly to the fruits contributed to control the firmness and the mass loss, as well as this treatment influenced the total soluble solids content, the luminosity and the red color of fruits with statistical difference compared to the control and covered with tracing paper (with or without PVA). The PVA coating solution applied directly on the fruits contributed to maintain the postharvest quality of the ripe tomatoes.

scholarly journals The Influence of Climate on Fruit Development and Quality of Four Low-chill Peach Cultivars

HortScience ◽  
2009 ◽  
Vol 44 (3) ◽  
pp. 666-670 ◽  
Author(s):  
Todd W. Wert ◽  
Jeffrey G. Williamson ◽  
Jose X. Chaparro ◽  
E. Paul Miller ◽  
Robert E. Rouse
Keyword(s):  
Fruit Development ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
North Central ◽  
Southwest Florida ◽  
The North ◽  
Solids Content

The effect of climate was observed on fruit quality of four low-chill peach cultivars (Flordaprince, Flordaglo, UFGold, and TropicBeauty). The cultivars were evaluated in three locations (north–central, central, and southwest Florida). Soluble solids content (SSC), titratable acidity (TA), SSC:TA ratio, fruit weight, blush, and fruit development period (FDP) were determined. Longer FDPs were observed at the north–central location than at the southwest location. Fruit development and the expression of quality attributes were affected by location during fruit growth with higher color and SSC and shorter FDP occurring under warmer conditions. Within locations, ‘UFGold’ had the shortest FDP except at the southwest location where its chilling requirement may not have been met. At the central and southwest locations, ‘UFGold’ also tended to have lower TA values and higher SSC;TA ratios than the other cultivars.

scholarly journals Road transport vibration stress impact on ‘Palmer’ mangoes quality and shelflife

2021 ◽  
Vol 43 (2) ◽  
Author(s):  
Josenara Daiane de Souza Costa ◽  
Acácio Figueiredo Neto ◽  
Nelson Cárdenas Olivier ◽  
Marcos Antônio da Silva Irmão ◽  
Marylia de Sousa Costa ◽  
...  
Keyword(s):  
Titratable Acidity ◽  
Road Transport ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Storage Quality ◽  
Vibration Machine ◽  
Vibration Stress ◽  
Absorbance Difference ◽  
Solids Content

Abstract Studying the causes of postharvest fruit loss is important to avoid reduction of quality and quantity for the consumer due, for example, to the influence of frequent impacts from vibrations during transportation. In this sense, this study evaluates the storage quality of ‘Palmer’ mangoes after being subjected to different simulated road transport vibrations. Vibration was simulated from the analysis of the profile of the frequencies generated in road transport of fruit, determined in a tractor trailer. ‘Palmer’ mangoes stored after vibration stress wereevaluated for: mass loss, absorbance difference index (IAD), peel and pulp browning index (BI), pulp firmness, soluble solids content, and titratable acidity. The development of a vibration machine made it possible to satisfactorily simulate specific vibration frequencies. Vibration stress during simulated transport led to accelerated weight loss, decreased pulp firmness, and peel browning in ‘Palmer’ mangoes.

scholarly journals Postharvest Quality of Grape Tomatoes Treated with 1-Methylcyclopropene at Advanced Ripeness Stages

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 183-187 ◽  
Author(s):  
Muharrem Ergun ◽  
Steven A. Sargent ◽  
Donald J. Huber
Keyword(s):  
Ethylene Production ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Fruit Firmness ◽  
Soluble Solids Content ◽  
Respiration Rates ◽  
Total Titratable Acidity ◽  
Solids Content

Grape tomatoes (Lycopersicon esculentum Mill. `Santa') harvested at light-red (>90% color) and full-red stages were treated with 1 μL·L–1 1-methylcyclopropene (1-MCP) for 24 hours at 20 °C and stored at 20 °C. After 1 day of storage, fruit harvested at light-red stage treated with 1-MCP had a 56% lower respiration rate than untreated fruit. By day 7, respiration rates of the two treatments had converged at about 2 mL·kg–1·h–1. Ethylene production of light-red stage tomatoes treated with 1-MPC was 24% lower than untreated during storage, with rates converging by day 11. For fruit harvested full-red, 1-MCP had similar effects on respiration and ethylene production, although convergence occurred earlier, by day 5. Subsequent tests were conducted only with fruit harvested at full-red stage, since fruit harvested at the light-red stage had lower soluble solids content (4.3%) than fruit harvested at the full-red stage (5.5%). Several combinations of 1-MCP concentrations and exposure times were applied at 20 °C: 1 μL·L–1 for 24 h, 5 μL·L–1 for 6 or 12 h, 25 μL·L–1 for 6 or 12 h, and 50 μL·L–1 for 6 or 12 h; following the respective pretreatment fruits were stored at 20 °C. 1-MCP pretreatment extended marketable life by 1 d, irrespective of pretreatment regime, where untreated and pretreated fruit remained marketable (<15% of fruit soft, decayed and/or shriveled) for 6 and 7 d, respectively. However, 1-MCP did not affect whole fruit firmness, epidermal color, internal color, soluble solids content (6.5%), total titratable acidity (0.64%), or pH (4.3). In a third test simulating commercial handling procedures, full-red harvested tomatoes were treated with 1 μL·L–1 1-MCP for 24 h at either 13 or 20 °C, stored for 4 d at 13 °C, and then transferred to 20 °C. Under these conditions, marketable life for untreated and 1-MCP-treated tomatoes was 7 and 8 d, respectively.

scholarly journals Influence Of Soil Type On Yield And Quality Of Different Apple Cultivars

2017 ◽  
Vol 74 (1) ◽  
pp. 21
Author(s):  
Alina Viorica ILIE ◽  
Cristina PETRISOR ◽  
Dorel HOZA ◽  
Viorel OLTENESCU
Keyword(s):  
Ascorbic Acid ◽  
Fruit Quality ◽  
Soil Type ◽  
Dry Matter ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Yield And Quality ◽  
Apple Cultivars ◽  
Solids Content

The objective of this study was to determine influence of different soil type on apple yield and quality. To investigate the variation in fruit quality, apples were harvested at commercial maturity on two different soil type. The investigations was conducted in experimental apple orchards located in Focsani region on two different soil type: luvic  brown typical and  luvic brown pseudogleizate. Fruits of Jonathan and Golden Delicios cultivars were tested for color, soluble solids content, total acidity, ascorbic acid, anthocyanins content and chlorophyls content with specific analytrical methods. At harvest yield, dry matter, soluble solids content, ascorbic acid and acidity were affected by soil type. In this study, no significant soil effect was found on color, anthocyanins and chlorophyll fruit content. The results obtained in this study suggest that luvic brown pseudogleizate soil leading to increased yields and enhanced fruit quality.

Phenolic compounds profile, carbohydrates and external fruit quality of the ‘Concorde’ pear (Pyrus communisL.) after bagging

2012 ◽  
Vol 92 (1) ◽  
pp. 67-75 ◽  
Author(s):  
Metka Hudina ◽  
Franci Stampar ◽  
Primoz Orazem ◽  
Maja Mikulic Petkovsek ◽  
Robert Veberic
Keyword(s):  
Phenolic Compounds ◽  
Fruit Quality ◽  
Pyrus Communis ◽  
Soluble Solids ◽  
Soluble Solids Content ◽  
Pear Fruit ◽  
European Pear ◽  
Pyrus Communis L ◽  
Solids Content

Hudina, M., Stampar, F., Orazem, P., Mikulic Petkovsek, M. and Veberic, R. 2012. Phenolic compounds profile, carbohydrates and external fruit quality of the 'Concorde' pear ( Pyrus communis L.) after bagging. Can. J. Plant Sci. 92: 67–75. The practice of pre-harvest bagging has been extensively used in several fruit crops to improve the commercial value of the fruit. The purpose of this study was to investigate the effect of fruit bagging on internal and external quality of the European pear (Pyrus communis L.) cv. ‘Concorde’. Fruit quality was determined by chemical analyses (individual sugars, organic acids and phenolic compounds) and physical characteristics in 2005 and 2006. Bagging of pear fruit after June drop until harvest significantly reduced fruit length in both observed years. Fruit bagging resulted in increased firmness of the fruit only in 2006. Soluble solids content was significantly lower in bagged fruit in 2006. In 2005, bagging had no influence on firmness and soluble solids content. Bagging improved fruit surface lightness, since L* was higher in the bagged than in the control fruit in both years. Also the a* parameter was higher in bagged fruit. We noted significant influence of bagging on total sugars content. Bagging European pear fruit decreased the content of phenolic compounds in skin (catechin, chlorogenic acid, epicatechin, p-coumaric acid, quercetin 3-O-galactoside, quercetin 3-O-glucoside, quercetin 3-O-rhamnoside). The removal of bags 7 d before harvest significantly increased glucose, shikimic and fumaric acids.

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