Gibberellic acid spray and bunch bagging increase bunch weight and improve fruit quality of ‘Barhee’ date palm cultivar under hot arid conditions

2012 ◽  
Vol 138 ◽  
pp. 96-100 ◽  
Author(s):  
Mohamed A. Awad ◽  
Adel D. Al-Qurashi
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Date Palm ◽  
Arid Conditions

scholarly journals Effects of Various Quantities of Three Irrigation Water Types on Yield and Fruit Quality of ‘Succary’ Date Palm

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 796
Author(s):  
Mohamed A. Mattar ◽  
Said S. Soliman ◽  
Rashid S. Al-Obeed
Keyword(s):  
Soil Water ◽  
Fruit Quality ◽  
Irrigation Water ◽  
Deficit Irrigation ◽  
Date Palm ◽  
Saline Water ◽  
Irrigation Level ◽  
Water Types ◽  
Palm Trees

A field experiment was conducted on date palm trees (Phoenix dactylifera ‘Succary’) cultivated on sandy loam soil from 2017 to 2018. This study investigated the effects of providing water of three different qualities, namely freshwater (FR) and two saline water sources: reclaimed wastewater (RW) and well-water (WE) applied through three irrigation levels representing 50% (I50), 100% (I100), and 150% (I150) of crop evapotranspiration (ETc), on the soil water and salt distribution patterns, yield, water productivity (WP), and fruit quality of the ′Succary′ date palm. The electrical conductivity (ECw) of FR, RW, and WE were 0.18, 2.06, and 3.94 dS m−1, respectively. Results showed that WE applied by the I150 treatment had the highest soil water content, followed by RW used in the I100 irrigation level and FR with I50, whereas the soil salt content was high for WE applied in the I50 level and low for FR applied by the I150 treatment. Deficit irrigation (I50) of date palms with either RW or WE reduced date yields on average 86 kg per tree, whereas the yield increased under over-irrigation (I150) with FR to 123.25 kg per tree. High WP values were observed in the I50 treatments with FR, RW, or WE (on average 1.82, 1.68, and 1.67 kg m−3, respectively), whereas the I150 treatment with each of the three water types showed the lowest WP values. Fruit weight and size were the lowest in the full irrigation (I100) with WE, whereas the I150 treatment with RW showed the highest values. There were no significant differences in either total soluble solids (TSS) or acidity values when the irrigation level decreased from 100% to 50% ETc. Compared with both I50 and I100 treatments, reduced values of both TSS and acidity were observed in the I150 treatment when ECw decreased from 3.94 to 0.18 dS m−1,. Fruit moisture content decreased with the application of saline irrigation water (i.e., RW or WE). Total sugar and non-reducing sugar contents in fruits were found to be decreased in the combination of RW and I150, whereas the 50% ETc irrigation level caused an increment in both parameters. These results suggest that the application of deficit irrigation to date palm trees grown in arid regions, either with FR or without it, can sufficiently maximize WP and improve the quality of fruits but negatively affects yield, especially when saline water is applied. The use of saline water for irrigation may negatively affect plants because of salt accumulation in the soil in the long run.

Effects of trellising, crown bunch handling, and the number of oil emulsion and gibberellic acid sprays on harvest-pruned sultanas

1979 ◽  
Vol 19 (96) ◽  
pp. 122 ◽  
Author(s):  
RA Sarooshi ◽  
EA Roberts
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Early Spring ◽  
Bud Burst ◽  
Single Wire ◽  
Oil Emulsion ◽  
Oil In Water ◽  
Water Sprays ◽  
Dried Fruit

Effects of trellising together with the use of various foliage wire arrangements on the production and quality of harvest-pruned sultanas were studied over 4 years. In one experiment a single wire and four narrow 0.4 m 'T' trellis systems, and in a second experiment four 0.9 m wide 'T' trellis and one 0.4 m narrow 'T' trellis system, were tested. Other treatments superimposed on all trellises included crown bunch removal in early spring or at harvest pruning, one and two alkaline oil-in-water sprays (oil sprays) and gibberellic acid (GA) or no GA spray. There were no differences between the four narrow trellises. Dried fruit yield of these four trellises was greater than that of the single wire by an average of 27%, because of higher bunch and cane numbers. There were also no differences between the four wide trellises except that two of the complex ones had more canes. The narrow trellis NTI (used in both experiments) yielded 27% less than the wide trellises because of fewer bunches per vine, caused by lower cane numbers and fruitfulness. Trellising had no effect on fruit quality and only marginal effects on rate of fruit drying, most probably due to low vigour of the experimental vines. As the complex trellis systems had no advantage over the simpler two wire 'T' trellises, their use in harvest pruning is not advocated. In both experiments two oil sprays produced slightly better fruit quality with faster drying of fruit. Use of two oil sprays is warranted where fruit has to be dried rapidly to minimise risk due to rain damage. Early crown bunch removal did not reduce yield and the best time for bunch removal was 6 weeks after bud burst. Use of GA in harvest pruning is not recommended as it does not improve fruit quality and in some years leads to slower fruit drying.

EFFECTS OF BUNCH THINNING ON YIELD AND FRUIT QUALITY OF 'KHALAS' DATE PALM

2010 ◽  
pp. 725-732
Author(s):  
S.S. Soliman ◽  
R.S. Al-Obeed ◽  
M.M. Harhash
Keyword(s):  
Fruit Quality ◽  
Date Palm

Effects of gibberellic acid on growth, yield and fruit quality of fig (Ficus caricaL.)

2017 ◽  
pp. 183-188
Author(s):  
A.R. Kurubar ◽  
T.B. Allolli ◽  
M.K. Naik ◽  
S.G. Angadi
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Growth Yield

scholarly journals Effect of pollination methods on yield and fruit quality of Barhy date palm under Aswan conditions

2021 ◽  
Vol 52 (2) ◽  
pp. 60-69
Author(s):  
A. El-Salhy ◽  
A. Masoud ◽  
Doaa El-Kassas ◽  
Ezz Gadalla ◽  
Hafez Hassan
Keyword(s):  
Fruit Quality ◽  
Date Palm ◽  
Pollination Methods
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