Agronomic performance of beet cultivars as a function of phosphorus fertilization

ABSTRACT The lack of phosphorus in soil affects the development and productivity of plants; however, in order for them to express the full potential, it is necessary to supply this nutrient. The objective of this study was to define adequate doses of phosphorus, which maximize the productivity and quality of four beet cultivars, and to identify among them the most efficient use of phosphorus. The experiment was carried out at the Rafael Fernandes Experimental Farm, of the Federal Rural Semi-Arid University, Mossoró, RN state, Brazil, from July to October 2016. The experimental design was a randomized block in a 4 x 4 factorial scheme with four repetitions, corresponding to four beet cultivars (Early Wonder, Fortuna, Kestrel and Cabernet) and four doses of phosphorus (0, 90, 180 and 270 kg ha-1 of P2O5). The dose that maximized commercial productivity was 186 kg ha-1 of P2O5 for the cultivars Early Wonder (21.71 t ha-1) and Kestrel (22.59 t ha-1), 180 kg ha-1 of P2O5 for Carbenet (25.82 t ha-1) and 183 kg ha-1 of P2O5 for Fortuna (25.40 t ha-1). The Cabernet and Fortuna cultivars were classified as not efficient but responsive, whereas Early Wonder and Kestrel were efficient but not responsive. Phosphorus did not influence content of soluble solids and percentage of white rings at the root.

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

Pesquisa Agropecuária Brasileira ◽

10.1590/s1678-3921.pab2021.v56.01590 ◽

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.

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Effect of Planting Density on the Agronomic Performance and Fruit Quality of Three Pineapple Cultivars (Ananas comosus L. Merr.)

International Journal of Agronomy ◽

10.1155/2021/5559564 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Juan C. Neri ◽

Jegnes Benjamín Meléndez Mori ◽

Nuri Carito Vilca Valqui ◽

Eyner Huaman Huaman ◽

Roicer Collazos Silva ◽

...

Keyword(s):

Fruit Quality ◽

Block Design ◽

Leaf Length ◽

Soluble Solids ◽

Planting Density ◽

Ananas Comosus ◽

Agronomic Performance ◽

Technological Intervention ◽

Low Degrees

Pineapple is a crop of great importance for the economic stability of a large number of Peruvians; however, in areas experiencing low degrees of technological intervention, farmers generally adopt low planting densities. The objective of this study was to determine the effect of three plantation densities (35700, 47600, and 55500 plants ha−1) on the agronomic performance and fruit quality of three pineapple cultivars (“Golden,” “Smooth Cayenne,” and “Santa Rosa” ecotype). The experiment was performed under a randomized complete block design (RCBD) in a factorial arrangement, and the data were subjected to analysis of variance and the Tukey test ( p < 0.05 ). The results show significant differences in terms of plant height and D-leaf length, with “Golden” being the cultivar that achieved the best performance at the three planting densities. The diameter (11.77–13.29 cm) and weight of the fruit without a crown (1.48–1.85 kg) were not affected by the treatments; in contrast, the length and weight of the fruit with a crown did exhibit significant variations, highlighting the “Smooth Cayenne” cultivar and “Santa Rosa” ecotype at a density of 55500 plants ha−1, respectively. The highest estimated yield (>100 t ha−1) for the three pineapple cultivars was recorded at a density of 55500 plants ha−1. The content of total soluble solids was higher in the “Golden” cultivar, but in general, all the fruits exceeded the established standards. Based on the results, it is recommended that farmers in the area and those with similar conditions establish a planting density of 55500 plants ha−1 because it improves the yield without damaging the quality of the fruit of the pineapple cultivars evaluated.

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Evaluation of mandarin hybrids grafted on 'Rangpur' lime in the Coastal Tablelands, Brazil

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452020008 ◽

2020 ◽

Vol 42 (6) ◽

Author(s):

Lucas de Oliveira Ribeiro ◽

Eduardo Augusto Girardi ◽

Hélio Wilson Lemos de Carvalho ◽

Debora Costa Bastos ◽

Walter dos Santos Soares Filho ◽

...

Keyword(s):

Experimental Design ◽

Vitamin C ◽

Fruit Production ◽

Soluble Solids ◽

Northeastern Brazil ◽

Cultivation System ◽

Rangpur Lime ◽

Regional Market ◽

Tropical Conditions

Abstract The production of mandarins is incipient in Northeastern Brazil in spite of the large regional market. Few studies have reported the performance of mandarins under the tropical conditions in Brazil, considering that, in general, the quality and yield of these fruits are more expressive in regions of subtropical and Mediterranean climates. In this work, tree size, fruit production and quality of four mandarin hybrids (‘Piemonte’ mandarin-tangor, ‘Murcott’ tangor and ‘Page’ and ‘Nova’ tangelo-mandarin) grafted on ‘Rangpur’ lime rootstock in Umbaúba, State of Sergipe, Brazil, were evaluated. The experimental design was randomized blocks with three replicates and three trees per plot. Planting was carried out in 2008 at tree spacing of 6.0 x 3.0 m in rainfed cultivation system. ‘Piemonte’ mandarin-tangor was more productive than ‘Murcott’ tangor and ‘Nova’ and ‘Page’ tangelo-mandarin, under the conditions evaluated in Umbaúba up to the eleventh year after planting. Regarding fruit quality, ‘Piemonte’ mandarin-tangor and ‘Page’ tangelo-mandarin can be indicated both for fresh consumption and for processing due to their higher total soluble solids, ratio and vitamin C content in relation to ‘Murcott’ tangor.

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Competition of onion genotypes in the soil and climatic conditions of Guarapuava, State of Paraná

Acta Scientiarum Biological Sciences ◽

10.4025/actascibiolsci.v43i1.53105 ◽

2021 ◽

Vol 43 ◽

pp. e53105

Author(s):

Marcela Padilha Iastremski ◽

Juliano Tadeu Vilela de Resende ◽

Cristhiano Kopanski Camargo ◽

Marcos Guilherme Ruthes ◽

Marco Antonio Pereira Santos

Keyword(s):

Experimental Design ◽

Climatic Conditions ◽

Early Flowering ◽

Agronomic Performance ◽

Productive Performance ◽

Yield And Quality ◽

Experimental Area ◽

Commercial Cultivars ◽

Total Productivity

The use of genotypes more adapted to climatic conditions can contribute to increase the yield of onion producers. The goal of this study was to evaluate the agronomic performance of 15 onion genotypes in the soil and climatic conditions of Guarapuava, state of Paraná. The study was conducted in the experimental area of Horticulture, Cedeteg campus, Universidade Estadual do Centro-Oeste (UNICENTRO), Guarapuava, state of Paraná, Brazil, from July to November 2018. The experimental design used was randomized blocks, with four replications, and the treatments consisted of four commercial cultivars Optima F1, Bella Dura, Sirius F1, Soberana F1 and eleven experimental genotypes N1, N2, N3, N4, N5, N6, N7, N8, N9, AF4241 and AF4243. Biometric characteristics of the plants, production components and early flowering were evaluated. Plants presented between 6 and 9 leaves, in which N1, N3, N4 and N6 had less than 7 leaves, differing statistically from the others. The cultivar Optima F1 and the genotypes N2, N3, N5, N6, N7 and N8 presented the tallest plants, with 66.1 to 76.0 cm. The pseudostem diameter did not differ significantly between genotypes, showing values between 15.2 and 20.4 mm. Total productivity was higher in genotypes N2, N6, N5, N4, N3, N7 with values from 43.6 to 50.3 t ha-1. The highest average bulb mass was found in N2, N4, N6, Sirius F1, Optima F1 and Soberana F1, with 74.2 to 91.1 g bulb-1. Regarding the commercial classification, the genotypes N2, N4, N5, N6 and the cultivars Sirius F1 and Soberana F1 presented more than 50% bulbs of classes 3+3C+4. Early flowering did not occur in any of the analyzed genotypes. The use of cultivars with high productive performance and adapted to climatic conditions, when handled properly, can result in greater yield and quality of bulbs.

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Postharvest quality of ‘Roxo de Valinhos’ fig fruits grown in semi-arid conditions

Comunicata Scientiae ◽

10.14295/cs.v8i1.1546 ◽

2017 ◽

Vol 8 (1) ◽

pp. 93

Author(s):

Francisco Sidene Oliveira Silva ◽

Eduardo Castro Pereira ◽

Vander Mendonça ◽

Francisco Mickael De Medeiros Câmara ◽

Gustavo Alves Pereira ◽

...

Keyword(s):

Titratable Acidity ◽

Soluble Solids ◽

Postharvest Quality ◽

Semiarid Region ◽

Chemical Characteristics ◽

Arid Conditions ◽

Soluble Solid ◽

Physiology Laboratory ◽

Semi Arid

Aiming to evaluate the postharvest quality of ‘Roxo de Valinhos’ fig fruits grown in semi-arid conditions, this experiment was carried out in November, 2014, where fig fruit variety ‘Roxo de Valinhos’ were harvested from plants located at the didactic orchard of the Federal Rural University of Semi-Arid (UFERSA), Mossoró-RN, Brazil. Fruits were randomly harvested from 30 fig plants, spaced 2 m x 1.5 m, with 2 years old, according to three the fruit development stages (50%, 75% and 100% mature). The fruits were analyzed in Postharvest Physiology Laboratory, where the physical and chemical characteristics were evaluated, using 10 fruits for each stage. The evaluated characteristics were: weight, length, diameter, firmness, soluble solids, pH, titratable acidity and vitamin C. For the physical characteristics, fruits 100% mature presented the best results for weight, length and diameter, except for firmness which in fruits 50% mature presented the best results. For the chemical characteristics, only the soluble solid variable was signiicant and fruits 100% mature showed the best result, in this way, the fig tree ‘Roxo de Valinhos’ achieved the postharvest fruit quality and is viable for the semiarid region of the Rio Grande Norte State.

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Deficit Irrigation to Enhance Fruit Quality of the ‘African Rose’ Plum under the Egyptian Semi-Arid Conditions

Agronomy ◽

10.3390/agronomy11071405 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1405

Author(s):

Islam F. Hassan ◽

Maybelle S. Gaballah ◽

Hanan M. El-Hoseiny ◽

Mohamed E. El-Sharnouby ◽

Shamel M. Alam-Eldein

Keyword(s):

Fruit Quality ◽

Deficit Irrigation ◽

Total Yield ◽

Fruit Yield ◽

Soluble Solids ◽

Limited Information ◽

Yield And Quality ◽

Arid Conditions ◽

Semi Arid

Evolved in South Africa and released to market in 2009, the ‘African Rose’ plum has been introduced and grown under the Egyptian semi-arid conditions since 2010. Within that time, this cultivar has faced significant fruit quality issues, mainly poor color and low total soluble solids (TSS). Several trials using foliarly applied growth regulators have been conducted, but with little conspicuous results on fruit yield and quality. There is very limited information about the relationship between irrigation regime and fruit quality for this cultivar. Therefore, a field experiment was conducted to study the effect of deficit irrigation on the quality of the ‘African Rose’ plum during the 2019 and 2020 seasons. Five-year-old hedge growing trees were subjected to three deficit irrigation regimes: 100% (control), 80%, and 60% of the crop evapotranspiration (ETc) after the pit hardening stage until the end of the harvest season (May to June period) were evaluated. Results indicated that deficit irrigation positively enhanced the levels of abscisic acid (ABA), total phenols, and anthocyanins with improved fruit TSS and maturity index, although fruit yield, acidity, size, and firmness were decreased. Deficit irrigation could be suggested as a sustainable novel solution to improve the fruit quality of the ‘African Rose’ plum grown under the semi-arid conditions of Egypt. Although the total yield and some quality characteristics were not improved, the early harvested fruit with enhanced color and taste could be a good start for additional research to solve other quality-related issues under such conditions.

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Agronomic performance and physicochemical characteristics of onion genotypes under different spacing in the humid Amazonian tropics

International Journal for Innovation Education and Research ◽

10.31686/ijier.vol9.iss4.3061 ◽

2021 ◽

Vol 9 (4) ◽

pp. 331-349

Author(s):

Luiz Carlos Piacentini ◽

Bruna Corrêa Moreira ◽

Cláudia Barbosa Cordeiro ◽

Augusto Uchoa de Andrade ◽

Marcos Ribeiro da Silva Vieira ◽

...

Keyword(s):

Experimental Design ◽

Germination Rate ◽

Physicochemical Characteristics ◽

Soluble Solids ◽

Average Weight ◽

Agronomic Performance ◽

Significant Difference ◽

Line Spacing ◽

Southwest Region ◽

Two Stages

The Southwest region of Pará state, Brazil, imports 100% of all onion consumed from other regions of the country, which generates market dependence and raises the product's costs. The present study investigated parameters related to germination, agronomic performance and postharvest characteristics of five onion cultivars at different planting densities. The experiment was conducted in two stages. In the first, in a greenhouse, the germination kinetics was evaluated. In the second, in the field, the seedlings were transplanted into beds. The experimental design was in complete randomized blocks in a 5 x 3 factorial scheme with three replications. The treatments consisted of the combination of five cultivars (Mata Hari, Dulciana, Cimarron, NUN 1205-F1 and Vale Ouro IPA 11) and three line spacing (20, 30 and 40 cm) 8 cm between plants. As for the germination rate (GR), the results allowed to highlight the cvs. Cimarron and Vale Ouro IPA 11 with an 80.55% and 77.77% of GR, respectively. There was a significant difference for total bulb productivity, highlighting Vale Ouro IPA 11 in the 8 x 20 cm spacing. For the bulb diameter, cv. Vale Ouro IPA 11 obtained the best results in all classes. In the average weight of the bulbs, cv. Vale Ouro IPA 11 in the 8 x 40 cm spacing was the best treatment with 60.77g. As for total soluble solids, cv. Vale Ouro IPA 11 presented °Brix higher than the others, being significant at 1%. These results demonstrate that it is possible to produce quality onions in the Southwest region of Pará, which would reduce prices, since all commercialized onions come from regions outside the state.

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Accumulation of nutrients and agronomic performance of grafted seedless watermelon

Pesquisa Agropecuária Tropical ◽

10.1590/1983-40632016v4639610 ◽

2016 ◽

Vol 46 (3) ◽

pp. 311-320 ◽

Cited By ~ 1

Author(s):

Joice Simone dos Santos ◽

Rita de Cássia Souza Dias ◽

Leílson Costa Grangeiro ◽

Welson Lima Simões ◽

Magnus Dall'Igna Deon

Keyword(s):

Experimental Design ◽

Dry Matter ◽

Citrullus Lanatus ◽

Sampling Time ◽

Production Costs ◽

Soluble Solids ◽

Agronomic Performance ◽

Nutrient Accumulation ◽

Seedless Watermelon ◽

Macro And Micronutrients

ABSTRACT Chemical fertilizing is one of the main inputs that increase watermelon production costs. Watermelon grafting with compatible rootstocks and a vigorous root system may increase the efficiency of nutrients absorption. This study aimed at determining the accumulation of dry matter and nutrients, as well as the agronomic performance of grafted watermelon. The triploid 'Precious Petite' watermelon was used as graft and the Line BGCIA941 (Citrullus lanatus var. citroides) as rootstock. The experimental design consisted of randomized blocks, in a split-plot, with six replicates. The 'Precious Petite' grafted onto Line BGCIA941, ungrafted 'Precious Petite' and ungrafted Line BGCIA941 were evaluated in the plot, while the subplot corresponded to the sampling time (0, 10, 20, 30, 40, 50, 60 and 70 days after transplanting). 'Precious Petite' grafted onto Line BGCIA 941 accumulated more macro and micronutrients than the ungrafted plants, increasing fruit yield, flesh firmness and rind thickness, but it did not affect the soluble solids contents. The decreasing order for nutrient accumulation in the grafted plants was N > K > Ca > Mg > P > S > Fe > Mn > Zn > B > Cu, whereas for ungrafted 'Precious Petite' it corresponded to N > K > Ca > Mg > P > S > Mn > Fe > B > Zn > Cu.

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Post Harvest Quality of Acid Lime Fruits 'Tahiti' Grafted on Genotype (TSKCx (LCR x TR) – 017), under Saline Stress

Journal of Experimental Agriculture International ◽

10.9734/jeai/2019/v31i630085 ◽

2019 ◽

pp. 1-10

Author(s):

Sabrina Vieira de Sousa ◽

Franciscleudo Bezerra da Costa ◽

Luderlândio De Andrade Silva ◽

Marcos Eric Barbosa Brito ◽

Ana Marinho do Nascimento ◽

...

Keyword(s):

Phenolic Compounds ◽

Experimental Design ◽

Soluble Sugars ◽

Titratable Acidity ◽

Soluble Solids ◽

Saline Stress ◽

Total Soluble Sugars ◽

Post Harvest ◽

Acid Lime

Objective: The objective of this study was to verify the post-harvest quality of fruits of the acid lime fruits ‘Tahiti’ of the genotype TSKC x (LCR x TR) – 017, under saline stress. Experimental Design: The experimental design was completely randomized from the factorial arrangement (2x5), where factor 1 corresponded to irrigation water salinity levels (0.3 and 3.0 dSm-1) and factor 2, storage time (0.5, 10, 15 and 20 days). Location and Duration of the Study: The experiment was conducted at the Center of Science and Technology Agrifood of the Federal University of Campina Grande, Pombal Campus, Paraíba, from February 2016 to February 2017. Methodology: The effect of the treatments was analyzed from the following evaluations: loss of fresh weight (%),soluble solids(%),titratable acidity (%),soluble solids and titratable acidity, hydrogen potential, concentration of H + ions (μM), electrical conductivity (dSm-1),ascorbic acid (mg 100 mL-1), total soluble sugars (mg 100 mL-1),phenolic compounds(mg 100 mL-1) and flavonoids (mg 100 mL-1). Results: It was observed the interaction between the saline concentration and the time of storage, on the physical-chemical and chemical characteristics in the acid file 'Tahiti'. Conclusion: The salinity of 3.0 dSm-1 showed the highest values for soluble solids, SS/AT ratios, total soluble sugars, phenolic compounds, and flavonoids during storage, indicating that the quality of these fruits was better when compared to fruits of the acidic 'Tahiti' file with 0.3 dSm-1 of salinity.

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DOSES DE POTÁSSIO VIA FERTIRRIGAÇÃO NA PRODUÇÃO E QUALIDADE DE FRUTOS DE MELANCIA EM PARNAÍBA, PI

Irriga ◽

10.15809/irriga.2005v10n3p205-214 ◽

2005 ◽

Vol 10 (3) ◽

pp. 205-214 ◽

Cited By ~ 3

Author(s):

Aderson Soares Andrade Júnior ◽

Nildo Da Silva Dias ◽

Luiz Gonzaga Medeiros Figueredo Júnior ◽

Rossini Daniel ◽

Valdemir Queiroz Ribeiro

Keyword(s):

Experimental Design ◽

Fruit Quality ◽

Plant Nutrition ◽

Citrullus Lanatus ◽

Soluble Solids ◽

Chemical Quality ◽

Marketable Yield ◽

Titrable Acidity ◽

Marketable Fruit

DOSES DE POTÁSSIO VIA FERTIRRIGAÇÃO NA PRODUÇÃO E QUALIDADE DE FRUTOS DE MELANCIA EM PARNAÍBA, PI Aderson Soares Andrade Junior1; Nildo da Silva Dias1; Luiz Gonzaga Medeiros Figueredo Junior2; Rossini Daniel2; Valdenir Queiroz Ribeiro11Embrapa Meio-Norte, Teresina, PI, [email protected] de Agronomia, Universidade Estadual do Piauí, Parnaíba, PI. 1 RESUMO Com o objetivo de avaliar o efeito da aplicação de diferentes doses de potássio via fertirrigação em melancia (Citrullus lanatus (Thumb.) Matsum. & Nakai), cultivar Crimson Sweet, foi conduzido um experimento na área experimental da Embrapa Meio-Norte, localizado no município de Parnaíba, PI, durante os meses de setembro a dezembro de 2004. O delineamento experimental utilizado foi o de blocos casualizado, com quatro repetições. Os tratamentos foram constituídos por cinco doses de K2O (0, 40, 80, 120 e 160 kg ha-1). Foram avaliadas as produções total e comercial, sólidos solúveis totais (SST), acidez total titulável (ATT) e pH. Não houve efeito das doses de K2O sobre a qualidade química dos frutos de melancia. A produção comercial dos frutos aumentou com a adubação potássica até a dose de 92,02 kg ha-1 de K2O. UNITERMOS: Citrullus lanatus, nutrição de plantas, irrigação localizada. ANDRADE JUNIOR, A.S.; DIAS, N.S.; FIGUEREDO JUNIOR, L.G.M.; RIBEIRO, V.Q.; DANIEL, R. POTASSIUM DOSES THROUGH FERTIGATION ON WATERMELON YIELD AND FRUIT QUALITY IN PARNAÍBA, PI, BRAZIL 2 ABSTRACT The aim of this study was to evaluate the effect of different potassium doses applied through fertirrigation to watermelon (Citrullus lanatus (Thumb.) Matsum. & Nakai), cv. Crimson Sweet. The experiment was carried out at an area of Embrapa Meio-Norte in Parnaíba, Piauí State, Brazil, from September to December, 2004. The experimental design was a completely randomized block, with four replications and five potassium doses (0, 40, 80, 120 and 160 kg ha-1). The total and marketable yield, total soluble solids (TSS), total titrable acidity (TTA) were evaluated. Results showed that the chemical quality of watermelon fruits was not significantly affected by potassium doses. The marketable fruit yield increased until potassium dose was 92.02 kg ha-1 of K2O. KEYWORDS: Citrullus lanatus, plant nutrition, drip irrigation.

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