Fruit mass, colour and yield of ‘Honeycrisp’™ apples are influenced by manually-adjusted fruit population and tree form

2006 ◽  
Vol 81 (3) ◽  
pp. 397-401 ◽  
Author(s):  
A. H. Wright ◽  
C. G. Embree ◽  
D. S. Nichols ◽  
R. K. Prange ◽  
P. A. Harrison ◽  
...  
Keyword(s):  
Tree Form ◽  
Fruit Mass

scholarly journals Fruit quality of ‘Eva’ e ‘Princesa’ apples grown under nitrogen fertigation in semiarid climate

2015 ◽  
Vol 19 (10) ◽  
pp. 967-972 ◽  
Author(s):  
João M. de S. Miranda ◽  
Ítalo H. L. Cavalcante ◽  
Inez V. de M. Oliveira ◽  
Paulo R. C. Lopes ◽  
Joston S. de Assis
Keyword(s):  
Fruit Quality ◽  
Skin Color ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Economic Viability ◽  
Fruit Firmness ◽  
Fruit Characteristics ◽  
Apple Cultivars ◽  
Fruit Mass

ABSTRACTThe production of high quality fruits is a necessary factor for the adaptation and production of plant species with economic viability. Thus, an experiment was conducted from July 2012 to January 2013 to evaluate the fruit quality of the ‘Eva’ and ‘Princesa’ apple cultivars as a function of nitrogen fertilization in Petrolina, PE, Brazil. The experimental design consisted of randomized blocks, with treatments distributed in a factorial arrangement 2 x 4, corresponding to apple cultivars (Eva and Princesa) and nitrogen doses (40; 80; 120 and 160 kg of N ha-1), with four replications and three plants in each plot. The fruit characteristics, such as fruit mass, skin color (luminosity, chromaticity, and colour angle), size (width and length), pulp firmness, titratable acidity (TA), soluble solids (SS) and the SS/TA ratio, were recorded. Nitrogen doses do not affect fruit quality of studied apple cultivars. The fruit quality attributes are different between apple cultivars: fruit firmness, SS/TA ratio, fruit mass and fruit diameter are superior for Princesa cultivar, while the fruit length for Eva cultivar is superior.

scholarly journals Phenology, production and quality of blueberry produced in humid subtropical climate

2018 ◽  
Vol 40 (3) ◽  
Author(s):  
José Gilberto Sousa Medeiros ◽  
Luiz Antonio Biasi ◽  
Claudine Maria de Bona ◽  
Francine Lorena Cuquel
Keyword(s):  
Fruit Set ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Subtropical Climate ◽  
Blue Color ◽  
Productive Performance ◽  
Climate Conditions ◽  
Mass Size ◽  
Fruit Mass

Abstract Studies on adaptation to the cultivation site are necessary for the recommendation of new cultivars. The aim of this study was to evaluate the phenological development, productivity and fruit quality of eight blueberry cultivars from the rabbiteye group (Aliceblue, Bluebelle, Bluegem, Briteblue, Climax, Delite, Powderblue and Woodard) and two from the highbush group (Georgiagem and O’Neal) under humid subtropical conditions in the 2012/2013, 2013/2014 and 2014/2015 cycles. Beginning and end of flowering, beginning and end of harvesting, fruit set, production, mass, diameter, pH, content of soluble solids, titratable acidity, ratio and coloring were evaluated. The evaluated cultivars presented flowering in the period from July to September, concentrating harvest in the months of November and December. The highest fruit set was observed in Delite, Climax, Briteblue and Powderblue cultivars. There were differences among cultivars regarding fruit mass, size, pH, content of soluble solids and acidity. The results showed that the cultivars exhibited blue color with few variations over the evaluation years. Cultivars with the best productive performance under humid subtropical climate conditions are Bluegem, Delite, Climax and Powderblue.

scholarly journals Potassium fertilizer applied by different methods in the zucchini crop

2016 ◽  
Vol 20 (7) ◽  
pp. 643-648
Author(s):  
Carlos N. V. Fernandes ◽  
Benito M. de Azevedo ◽  
Débora C. Camargo ◽  
Chrislene N. Dias ◽  
Mario de O. Rebouças Neto ◽  
...  
Keyword(s):  
Cucurbita Pepo ◽  
Net Present Value ◽  
Statistical Design ◽  
Soluble Solids ◽  
Internal Rate Of Return ◽  
Potassium Fertilizer ◽  
Maximum Value ◽  
Potassium Use Efficiency ◽  
Use Efficiency ◽  
Fruit Mass

ABSTRACT Aiming to evaluate the effect of potassium (K) doses applied by the conventional method and fertigation in zucchini (Cucurbita pepo L.), a field experiment was conducted in Fortaleza, CE, Brazil. The statistical design was a randomized block, with four replicates, in a 4 x 2 factorial scheme, which corresponded to four doses of K (0, 75, 150 and 300 kg K2O ha-1) and two fertilization methods (conventional and fertigation). The analyzed variables were: fruit mass (FM), number of fruits (NF), fruit length (FL), fruit diameter (FD), pulp thickness (PT), soluble solids (SS), yield (Y), water use efficiency (WUE) and potassium use efficiency (KUE), besides an economic analysis using the net present value (NPV), internal rate of return (IRR) and payback period (PP). K doses influenced FM, FD, PT and Y, which increased linearly, with the highest value estimated at 36,828 kg ha-1 for the highest K dose (300 kg K2O ha-1). This dose was also responsible for the largest WUE, 92 kg ha-1 mm-1. KUE showed quadratic behavior and the dose of 174 kg K2O ha-1 led to its maximum value (87.41 kg ha-1 (kg K2O ha-1)-1). All treatments were economically viable, and the most profitable months were May, April, December and November.

Incorporating Additional Tree and Environmental Variables in a Lodgepole Pine Stem Profile Model

1993 ◽  
Vol 8 (3) ◽  
pp. 86-90
Author(s):  
John C. Byrne
Keyword(s):  
Environmental Variables ◽  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Linear Equations ◽  
The United States ◽  
National Forest ◽  
Data Sets ◽  
Tree Form ◽  
Northern Rocky Mountains ◽  
Profile Model

Abstract A new variable-form segmented stem profile model is developed for lodgepole pine (Pinus contorta) trees from the northern Rocky Mountains of the United States. I improved estimates of stem diameter by predicting two of the model coefficients with linear equations using a measure of tree form, defined as a ratio of dbh and total height. Additional improvements were obtained by fitting this model to individual national forest data sets. Other tree and environmental variables tested but found of little use in improving stem profile estimates were crown ratio, habitat series, elevation, slope percent, and aspect. West. J. Appl. For. 8(3):86-90.

scholarly journals Physical characteristics of passionfruit cv. BRS gigante amarelo produced by flowers with three and four carpels

2020 ◽  
Vol 36 (5) ◽  
Author(s):  
Danilo Akio de Sousa Esashika ◽  
Fábio Gelape Faleiro ◽  
Nilton Tadeu Vilela Junqueira
Keyword(s):  
Spherical Shape ◽  
Physical Characteristics ◽  
Transverse Diameter ◽  
Reproductive Structure ◽  
Tukey Test ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Pericarp Thickness ◽  
Fruit Mass ◽  
Longitudinal Diameter

The carpel is the female reproductive structure composed of a set of stigma, style and ovary. Normally passionflower have three carpels, however, some cultivars have this structure in greater quantity. The objective of this work was to identify relationships between the number of carpels and the physical characteristics of BRS Gigante Amarelo fruits. The flowers with three and four carpels were marked, pollinated and the fruits harvested from these flowers analyzed for transverse diameter, longitudinal diameter, pericarp thickness, fruit mass, pulp mass, pulp ratio, number and weight of seeds. A completely randomized design with 10 replicates per treatment was used and each plot had the average of 3 fruits. The data were submitted to variance analysis and the means were compared by the Tukey test at 5% of probability. The fruits generated by flowers with 4 carpels were 18,30% heavier, their pulp were on average 20.75% heavier, presented transverse diameter 7,53% superior to that of fruits generated by flowers with 3 carpels. Similar increments were identified regarding the number of seeds and the weight of seeds per fruit that increased 18,85% and 52.42%, respectively. This result indicates that cv. BRS Yellow Giant with 4 carpels generates heavier fruits, pulp and seeds with a more spherical shape.

scholarly journals Melon fruit yield and quality as a function of doses and times of biostimulant application

2020 ◽  
Vol 9 (7) ◽  
pp. e130973911
Author(s):  
Roberto Cleiton Fernandes de Queiroga ◽  
Zaqueu Lopes da Silva ◽  
Odair Honorato Oliveira de ◽  
Elidayane da Nóbrega Santos ◽  
Higínio Luan Oliveira Silva ◽  
...  
Keyword(s):  
Block Design ◽  
Fruit Production ◽  
Soluble Solids ◽  
Application Time ◽  
Time Of Application ◽  
Yield And Quality ◽  
Randomized Block Design ◽  
Semi Arid Region ◽  
Fruit Mass

The objective of this study was to evaluate the productivity and quality of melon fruits as a function of the dose and time of application of biostimulant in the conditions of the semi-arid region of Paraíba. The experiment was carried out at the Federal University of Campina Grande, campus of Pombal - PB, Brazil, in a randomized block design in a 4 x 5 split plot scheme, with doses of biostimulant (0; 0.5; 1.0; 1, 5 and 2.0 L ha-1) and in the subset of the biostimulant application times (15; 20; 25 and 30 days before harvest - DAC), in four replications. Characteristics related to fruit production and quality were evaluated. There was no interaction between the factors of dose and application time of the biostimulant in any of the evaluated characteristics. Thus, the highest estimated values of number of fruits per plant, fruit mass and total melon production were obtained with the application of doses ranging from 0.9 to 1.5 L ha-1 and at the time of application it varied from 22,5 to 23.6 DAC. The content of soluble solids increased 5.5% when the biostimulant dose of 2.0 L ha-1 was used and 4.4% when the product was applied 15 days before harvest.

scholarly journals Agronomic aspects of two Physalis species as a function of Nitrogen fertilization

2018 ◽  
Vol 8 (2) ◽  
pp. 230-238
Author(s):  
Douglas Junior Bertoncelli ◽  
Marisa De Cacia Oliveira ◽  
Amanda Izabel Dos Passos ◽  
Taylon Henrique Casagrande ◽  
Ana Claudia Ariati
Keyword(s):  
Dry Mass ◽  
Economic Returns ◽  
Experimental Conditions ◽  
Alternative Source ◽  
Small Areas ◽  
Randomized Design ◽  
Efficient Performance ◽  
Limiting Nutrients ◽  
Fruit Mass ◽  
Number Of Branches

The cultivation of small fruits has been increasing with good economic returns, and among these, the genus Physalis has been an important alternative source of income due to the high value and possibility of cultivation in small areas. However, there is not established fertilization for this crop and considering that nitrogen is one of the most limiting nutrients for the growth and development of plants, this study aimed to evaluate the agronomic aspects of two species of Physalis submitted to different N doses. The experiment was conducted in a greenhouse in a completely randomized design, using two species (Physalis pubescens and P. peruviana) and five N doses (0, 200, 250, 300 and 350 kg ha-1), and seven replications. The plant height, dry mass of aerial part and roots, the number of branches, root length, yield and average fruit mass were evaluated. In these experimental conditions, it was observed that for P. peruviana the dose of 250 kg ha-1 N resulted in a greater yield of fruit per plant, as for P. pubescens the dose of 350 kg ha-1 N showed a more efficient performance.

scholarly journals Long-term effects of plant spacing on the growth and morphometry of Bertholletia excelsa

2021 ◽  
Vol 51 (3) ◽  
pp. 181-190
Author(s):  
Rafael Gonçalves de OLIVEIRA ◽  
Alex Soares de SOUZA ◽  
Victor Alexandre Hardt Ferreira dos SANTOS ◽  
Roberval Monteiro Bezerra de LIMA ◽  
Marciel José FERREIRA
Keyword(s):  
Average Diameter ◽  
Fruit Production ◽  
High Survival ◽  
Plant Spacing ◽  
Long Term Effects ◽  
Bertholletia Excelsa ◽  
Tree Form ◽  
Tree Crowns ◽  
Growth Space

ABSTRACT Plant spacing is a potential driver of tree form and yield in forest plantations. However, its effects on the productivity of tree plantations in the Amazon are still little known. This study examined the effects of six spacing regimes (3 x 4, 4 x 4, 4 x 5, 5 x 5, 5 x 6, and 6 x 6 m) on the growth and morphometry of a 20-year-old plantation of Bertholletia excelsa. We observed high, spacing-independent survival (> 70%). For timber production purposes, intermediate and two large spacing regimes tended to higher values of yield components, mainly diameter, biomass, and volume, although some did not differ significantly from the smallest spacing. One of the intermediate spacings (5 x 5 m) tended to higher commercial height. Tree crowns tended to be wider and longer in the larger spacings, which indicates the potential of these regimes for fruit production. Tree crowns exceeded the vital growth space in all spacing regimes, which suggests the need for thinning before the age of 20 years in all spacings to reduce intraspecific competition and increase yield. We estimated that a density of 84 remaining trees per hectare would be necessary to reach an average diameter of 40 cm at the age of 20 years. Thus, B. excelsa had high survival in the tested range of spacing regimes, while the intermediate and the largest spacing regimes led to better tree growth and morphometry.

scholarly journals APPLICATION RESULTS OF CUCUMBER GRAFTING ON DIFFERENT ROOTSTOSKS OF PUMPKIN

2018 ◽  
pp. 31-33
Author(s):  
G. S. Martirosyan
Keyword(s):  
Vitamin C ◽  
Total Yield ◽  
Growth Conditions ◽  
Summer Period ◽  
High Increase ◽  
Fruit Setting ◽  
The World ◽  
Growth Development ◽  
Fruit Mass ◽  
Female Flowers

At present it is very actual in vegetable growing the development of highly effective and ecologically safe methods for increasing yields and plant resistance to unfavorable growth conditions. One of these methods is grafting. The goal of the study was to learn the influence of the rootstock on the characteristics of the growth, development and yield of cucumber. Research was conducted in 2015-2016 in greenhouse in spring-summer period in Armenia. As a scions was used cucumber variety Nazrvan, which was grafted on 5 pumpkin rootstocks (VI033637, VI03338, VI03364, VI040903, VI056328) from the collection of the World Vegetable Center (WVC). The grafting was carried out according to the standard method. When the VI033637 rootstock was used, flowering started 5 days earlier than the ungrafted plants, while when grafted on VI040903, the fruits ripened 6.2 days earlier. High increase of early yield (33.3%) received when used both above mentioned rootstocks. VI033638 – 4.1 kg/m2 and VI033664- 9.9 kg/m2 samples provided high increase of the total yield. For all the types of rootstocks the grafted plants of cucumber surpass the non-grafted ones by height from 4.7 % to 21.7%, by marketability of fruits from 5% to 14% and by fruit mass from 15 gr to 45 g. At the beginning of fruit-setting of cucumber plants the number of female flowers increased from 27% to 63% depending on the rootstock sample. The amount of dry substances in all grafted plants has increased by 4.4-8.8% and the amount of vitamin C by 1.8-9.2%. As a result of research carried out by us, perspective rootstocks (VIO33638 and VIO33664) are identified by a set of economically valuable characteristics which are recommended for applying in the further investigation and breeding activities and in production of grafted plants.

Study on the Establishment Techniques for Dwarf Broussonetia papyrifera Fodder Forest

2012 ◽  
Vol 610-613 ◽  
pp. 3315-3318
Author(s):  
Hong Feng Wang ◽  
Lei Zeng ◽  
Hong Zhang
Keyword(s):  
Labor Cost ◽  
Economic Benefits ◽  
Lateral Branch ◽  
Work Efficiency ◽  
Fresh Weight ◽  
Broussonetia Papyrifera ◽  
Leaf Production ◽  
Tree Form ◽  
Crown Width ◽  
Leaf Productivity

The establishment techniques for drawf Broussonetia papyrifera fodder forest were present and performed in order to reduce the labor cost and increase the economic benefits, and further the leaf production was estimated based on the field observation. Guided by the dwarfing techniques for B. papyrifera tree, the tree can be dwarfed through tip and lateral branch pruning at the planting year. The optimized tree form after dwarfing is a clumped form with about 1.5m height and about 2m×1m crown width. This tree form facilitates subsequent leaf collecting and further improves the work efficiency. The leaf of dwarf Broussonetia papyrifera fodder forest can be collected six times per year, and the leaf productivity can be reach over 100×103kg fresh weight per hectare.

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