scholarly journals Interaction of nutrient supply and crop load of apple trees (Malus domestica Borkh.)

2008 ◽  
Vol 14 (1-2.) ◽  
Author(s):  
E. Szűcs ◽  
T. Kállay
Keyword(s):  
Fruit Quality ◽  
Analysis Data ◽  
Fruit Weight ◽  
Apple Trees ◽  
Crop Load ◽  
Nutrient Contents ◽  
General Terms ◽  
P Content ◽  
Foliar Nutrient

Long term fertilisation trials were combined with storage experiments with 'Jonathan' apple trees and fruits to study influence of tree nutrition on quantity and quality of crop. The site of experiments is a typical Carpathian-basin environment with loamy silt soil, high lime content and arid summers. Conclusions has been drown from six years' set of data. Augmented levels of soil fertilisation increased cropping capacity of apple trees, however, the fruit load has not met with cropping capacity in every year. More the def cit came into view in crop load, less the fruit quality resulted in. The deficit in cropping capacity, however, could not have been determined with simple rates as fruit weight per trunk circumference or similar. Better determination was obtained where foliar nutrient contents were correlated to crop per tree figures. In general terms, the N and Ca content in leaves increased with yields when K and P content formulated reciprocally. When storage quality of 'Jonathan' apple fruits were related to crop load (kg/tree), influence of crop deficit became visible. As the crop load and foliar nutrient levels interacted, the fruit quality (number of disordered apples after 6 month of storage) subjected of both physiological phenomena. Higher determination degree were obtained when crop load was assessed together with single or multiple foliar analysis data.

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

2007 ◽  
Vol 47 (5) ◽  
pp. 635 ◽  
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.

scholarly journals Influence of Crop Load on Bitter pit incidence and Fruit Quality of 'Gamhong'/M.9 Adult Apple Trees

2019 ◽  
Vol 38 (3) ◽  
pp. 145-153
Author(s):  
Hun-Joong Kweon ◽  
Moo-Yong Park ◽  
Yang-Yik Song ◽  
Dong-Yong Lee ◽  
Dong-Hoon Sagong
Keyword(s):  
Fruit Quality ◽  
Apple Trees ◽  
Crop Load ◽  
Bitter Pit

scholarly journals Effect of some bioproducts on the growth, yield and fruit quality of apple trees

2018 ◽  
Vol 45 (No. 3) ◽  
pp. 111-118
Author(s):  
Walid Mosa ◽  
Lidia Sas Paszt ◽  
Mateusz Frąc ◽  
Paweł Trzciński ◽  
Michał Przybył ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Bacterial Species ◽  
Klebsiella Oxytoca ◽  
Growth Yield ◽  
Quality Parameters ◽  
Fruit Weight ◽  
Beneficial Bacteria ◽  
Apple Trees ◽  
Cross Sectional

hese experiments began with the planting of maiden apple trees of cv. ‘Topaz’ in 2011. In springtime in 2012–2016, chemical fertilisation (NPK) and various natural bioproducts, namely Fertigo, Micosat, Humus UP, Humus Active + Aktywit PM, Aktywit PM, BioFeed Quality, BioFeed Amin, Vinassa, Florovit Natura and Florovit Eko were applied to the apple trees alone or enriched with Pantoea sp., Pseudomonas fluorescens, Klebsiella oxytoca and Rhizobium bacterial species. Growth, yield and fruit quality parameters were then evaluated. Our results reveal that the trunk cross-sectional area was greatly increased by the addition of the beneficial bacteria to Humus UP, Yeast, Vinassa and Micosat, as compared to NPK chemical fertilisation. Yeast, Vinassa, Micosat, Humus UP and BioFeed Amin enriched with the beneficial bacteria significantly increased fruit weight in kg and the number of fruits compared to the NPK control in 2015 and 2016.  

scholarly journals Phosphorus (P) improves industrial tomato quality and yield in soil with high phosphorus content

2020 ◽  
pp. 1335-1341
Author(s):  
Arthur Bernardes Cecílio Filho ◽  
Bruno Trevizaneli ◽  
Sergio Manuel Rugeles Reyes
Keyword(s):  
Soluble Solids ◽  
Tomato Crop ◽  
Nutrient Contents ◽  
Soil P ◽  
Yield And Quality ◽  
P Content ◽  
Tomato Processing ◽  
Commercial Yield ◽  
Solids Content

Soils under intensive and successive cropping with central pivot irrigation tend to present high nutrient contents, especially phosphorus (P), which is a nutrient with a great impact on the yield and quality of agricultural products. Among the rotating crops, the application of high P rates is common in processing tomato, although not supported by research. This work evaluates the effect of phosphate fertilization (0, 200, 400, 600, 800, and 1000 kg ha-1 P2O5) on the yield and quality of industrial tomato ‘Heinz 9553’ grown in a soil with high available P content (145 mg dm-3) resulting of an intensive vegetables cultivation, which have high demand by P. The highest total (127.4 t ha-1) and commercial (108.6 t ha-1) yields were obtained with 413.9 and 384 kg ha-1 P2O5, respectively. The results showed that pH of tomato juice, the percentages of green, red, and commercial fruits were not influenced by the applied P rates. However, nutrient delivery increased the soluble solids content up to 356 kg ha-1 P2O5, which is interesting for tomato processing. After harvesting the fruits, the available soil P content was increased with P supply to the plants. For improvement of commercial yield and soluble solids characteristics, the tomato crop shall be fertilised with P even though the soil has high P content.

scholarly journals FOLIAR APPLICATIONS OF ZINC, IRON AND MANGANESE INFLUENCE THE PLANT GROWTH AND FRUIT QUALITY OF PAPAYA CV. RED LADY

2020 ◽  
Vol 8 (5) ◽  
pp. 551-557
Author(s):  
Gurjot Singh Pelia ◽  
◽  
A K Baswal ◽  
Keyword(s):  
Plant Growth ◽  
Fruit Quality ◽  
Foliar Application ◽  
Ascorbic Acid Content ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Total Carotenoids ◽  
Heavy Soil

Prevalence of heavy soil is a major problem for fruit cultivation under Punjab conditions consequently leading to deficiency of several micro-nutrients including zinc (Zn), iron (Fe), and manganese (Mn) which adversely affects the growth and productivity. In this view, a study was planned to investigate the effect of foliar applications of zinc sulphate (ZnSO4), iron sulphate (FeSO4), and manganese sulphate (MnSO4) on vegetative growth, reproductive growth and fruit quality of papaya cv. Red lady. Plants sprayed with ZnSO4 (0.4 %) exhibited significantly highest plant height, plant girth, number of leaves, petiole length; initiated an earliest flowering and fruiting; and improved fruit quality viz., fruit weight, fruit length, titratable acidity, soluble solids concentrations, ascorbic acid content, total phenols content, and total carotenoids content as compared with the control and all other treatments. In conclusion, foliar application ZnSO4 (0.4 %) significantly improved plant growth and fruit quality in papaya cv. Red lady.

scholarly journals Apple Orchard Productivity and Fruit Quality under Organic, Conventional, and Integrated Management

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 99-107 ◽  
Author(s):  
Gregory M. Peck ◽  
Preston K. Andrews ◽  
John P. Reganold ◽  
John K. Fellman
Keyword(s):  
Fruit Quality ◽  
Crop Yields ◽  
Block Design ◽  
Leaf Tissue ◽  
Titratable Acidity ◽  
Fruit Weight ◽  
Apple Orchard ◽  
Soluble Solids ◽  
Crop Load ◽  
Flesh Firmness

Located on a 20-ha commercial apple (Malus domestica Borkh.) orchard in the Yakima Valley, Washington, a 1.7-ha study area was planted with apple trees in 1994 in a randomized complete block design with four replications of three treatments: organic (ORG), conventional (CON), and integrated (INT). Soil classification, rootstock, cultivar, plant age, and all other conditions except management were the same on all plots. In years 9 (2002) and 10 (2003) of this study, we compared the orchard productivity and fruit quality of `Galaxy Gala' apples. Measurements of crop yield, yield efficiency, crop load, average fruit weight, tree growth, color grades, and weight distributions of marketable fruit, percentages of unmarketable fruit, classifications of unmarketable fruit, as well as leaf, fruit, and soil mineral concentrations, were used to evaluate orchard productivity. Apple fruit quality was assessed at harvest and after refrigerated (0 to 1 °C) storage for three months in regular atmosphere (ambient oxygen levels) and for three and six months in controlled atmosphere (1.5% to 2% oxygen). Fruit internal ethylene concentrations and evolution, fruit respiration, flesh firmness, soluble solids concentration (SSC), titratable acidity (TA), purgeable volatile production, sensory panels, and total antioxidant activity (TAA) were used to evaluate fruit quality. ORG crop yields were two-thirds of the CON and about half of the INT yields in 2002, but about one-third greater than either system in 2003. High ORG yields in 2003 resulted in smaller ORG fruit. Inconsistent ORG yields were probably the result of several factors, including unsatisfactory crop load management, higher pest and weed pressures, lower leaf and fruit tissue nitrogen, and deficient leaf tissue zinc concentrations. Despite production difficulties, ORG apples had 6 to 10 N higher flesh firmness than CON, and 4 to 7 N higher than INT apples, for similar-sized fruit. Consumer panels tended to rate ORG and INT apples to have equal or better overall acceptability, firmness, and texture than CON apples. Neither laboratory measurements nor sensory evaluations detected differences in SSC, TA, or the SSC to TA ratio. Consumers were unable to discern the higher concentrations of flavor volatiles found in CON apples. For a 200 g fruit, ORG apples contained 10% to 15% more TAA than CON apples and 8% to 25% more TAA than INT apples. Across most parameters measured in this study, the CON and INT farm management systems were more similar to each other than either was to the ORG system. The production challenges associated with low-input organic apple farming systems are discussed. Despite limited technologies and products for organic apple production, the ORG apples in our study showed improvements in some fruit quality attributes that could aid their marketability.

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