scholarly journals Growth, yield and fruit quality of 'Washington Navel' orange on four rootstocks during the first four years of production.

1969 ◽  
Vol 85 (3-4) ◽  
pp. 143-149
Author(s):  
Félix M. Román-Pérez ◽  
Agenol González-Vélez
Keyword(s):  
Puerto Rico ◽  
Fruit Quality ◽  
Citrus Sinensis ◽  
Growth Yield ◽  
Tree Canopy ◽  
Navel Orange ◽  
Washington Navel ◽  
Canopy Volume ◽  
Swingle Citrumelo

Performance of the rootstocks 'Swingle citrumelo', 'Naronja' and mandarins 'Cleopatra' and 'Sun Chu Sha' on 'Washington Navel' orange [Citrus sinensis (L.)] was evaluated at Corozal and Isabela, Puerto Rico, during the first four years of production. Mean number of fruit per tree was significantly different between locations and among rootstocks for 1996-97 and 1997- 98. Data were not taken in 1998-99 because of damage caused by Hurricane Georges. The first two years the amount of fruit was significantly higher at Corozal than at Isabela, with Swingle producing greatest fruit yield. In 1999-00 (fourth year of production) no significant differences between locations were detected for tree canopy volume. Significant differences for internal fruit quality were detected between locations and among rootstocks for acidity, brix/acidity ratio and pH. No significant differences were observed for brix between locations or among rootstocks.

scholarly journals Growth, Yield, Efficiency, and Fruit Quality of Five Navel Orange Clones During 4 Years

1969 ◽  
Vol 68 (4) ◽  
pp. 405-411
Author(s):  
Agripino Pérez-López ◽  
Carlos J. Torres
Keyword(s):  
Puerto Rico ◽  
Growth Yield ◽  
Tree Height ◽  
Fruit Weight ◽  
Navel Orange ◽  
Yield Efficiency ◽  
Acid Ratio ◽  
Canopy Volume ◽  
Selection Of

Clone 7 can increase three-fold the production of navel oranges in Puerto Rico. Clone 7 produced 293 fruits per tree. The number and weight of fruits per tree increased with age, whereas the size and fruit weight, navel volume and peel weight diminished. Growth measurements such as rootstock and scion diameter, scion/rootstock ratio, canopy diameter, tree height, and canopy volume are not as good parameters for the selection of navel orange clones as the number of fruits per m3 of canopy volume. Screening for varieties according to yield revealed that clones 5 and 7 were the most productive and that they should be recommended to the citrus growers. Clones 5 and 7 also had the highest Brix and acidity values, and an intermediate pH, which contribute to an appropriate Brix/acid ratio, typical of the high quality of these navel clones. The smallest fruits had significantly the highest juice percentage.

scholarly journals Production and quality of 'Hamlin' sweet orange [Citrus sinensis (L.) Osb.] grown on four rootstocks at three locations in Puerto Rico.

1969 ◽  
Vol 95 (1-2) ◽  
pp. 25-34
Author(s):  
Félix M. Román-Pérez ◽  
Agenol González-Vélez ◽  
Raúl Macchiavelli
Keyword(s):  
Puerto Rico ◽  
Fruit Quality ◽  
Citrus Sinensis ◽  
Sweet Orange ◽  
Soluble Solids ◽  
Quality Data ◽  
Horticultural Traits ◽  
Acid Ratio ◽  
Canopy Volume ◽  
Swingle Citrumelo

The 'Hamlin' sweet orange [Citrus sinensis (L.) Osb.] was evaluated in Isabela, Adjuntas and Corozal, Puerto Rico. This cultivar Is an early producer and Is used mainly by the Industry for juice. The cultivar was grafted to the rootstocks 'Swingle Citrumelo', 'Carrizo', Cleopatra' and 'Sun Chu Sha'. For six years, production, growth and fruit quality data [pH, total soluble solids (TSS), titrable acidity and TSS/acid ratio] were recorded to evaluate horticultural traits. Significant differences were detected In mean fruit number per tree between Corozal and the other sites. The highest yields were obtained at Corozal for the rootstock Sun Chu Sha. Yields at Isabela and Adjuntas were similar. In terms of growth, Swingle Citrumelo and Carrizo showed significantly smaller height and canopy volume. No significant differences were detected for fruit quality among the rootstocks at the three sites. At Isabela we observed the best maturity Index (TSS/acid ratio) for all the rootstocks (17.3). This cultivar could be recommended for planting in coastal areas such as Isabela for availability of ripe fruit In the months when there are none in the higher altitudes, from September to November. With regard to locality and yield, the best performance for this cultivar among all the rootstocks was observed at Corozal.

scholarly journals EFFECT OF PRE-HARVEST SPRAYING ON YIELD AND FRUIT QUALITY OF WASHINGTON NAVEL ORANGE FRUITS

2012 ◽  
Vol 3 (8) ◽  
pp. 2335-2345
Author(s):  
Thanaa Ezz ◽  
M. Aly ◽  
Ekbal Ahmed ◽  
M. Khalaf
Keyword(s):  
Fruit Quality ◽  
Navel Orange ◽  
Washington Navel

Effects of postharvest topping, autumn cincturing, and paclobutrazol on growth, yield, and fruit quality of the low chill nectarine cv. Sundowner in subtropical Australia

1993 ◽  
Vol 33 (3) ◽  
pp. 353 ◽  
Author(s):  
AP George ◽  
RJ Nissen ◽  
T Rassmussen
Keyword(s):  
Fruit Quality ◽  
Seasonal Pattern ◽  
Growth Yield ◽  
Tree Size ◽  
Yield Efficiency ◽  
Fruit Maturity ◽  
Canopy Volume ◽  
Effect On Yield ◽  
Subtropical Australia

Combinations of 3 methods of controlling tree size (use of the growth retardant paclobutrazol, postharvest topping, and autumn cincturing) were evaluated for their effects on growth, yield, and fruit quality of the low chill nectarine cv. Sundowner in subtropical Australia. Compared with controls over 3 seasons, paclobutrazol used alone reduced tree size by 34-52%, with further reductions when combined with light and severe postharvest topping (by 5-25 and 58-71%, respectively). Yield efficiency (as measured by yield per unit canopy volume) was significantly improved by paclobutrazol and was doubled when paclobutrazol was combined with severe postharvest topping. Although this combination reduced time associated with pruning, thinning, and harvesting, it had the disadvantage of delaying flowering and, consequently, fruit maturity in the subsequent harvest season. Light postharvest topping and autumn cincturing used with paclobutrazol had little effect on yield efficiency, fruit quality, or harvest period. The seasonal pattern of starch reserves for twigs was similar for all treatments, with starch levels falling to a minimum during the early harvest period. Measurements of starch in the major tree organs showed that at very low harvest increments (<10) there was little or no depletion of starch from the twigs and leaves, but as harvest increments increased (range 10-40), there was increasing starch depletion, in order of priority, from the roots, trunks, and limbs.

scholarly journals Plant growth, yield and fruit quality of ‘Lane Late’ navel orange on four citrus rootstocks

2011 ◽  
Vol 9 (1) ◽  
pp. 271 ◽  
Author(s):  
P. Legua ◽  
R. Bellver ◽  
J. Forner ◽  
M. A. Forner-Giner
Keyword(s):  
Plant Growth ◽  
Fruit Quality ◽  
Growth Yield ◽  
Navel Orange

scholarly journals The Efficiency of Calcium Boron and Carpox-K Sprays on Fruit Quality of Washington Navel Orange Trees

2020 ◽  
pp. 23-31
Author(s):  
A. A. EL- Khwaga ◽  
F. M. Abd El- Latif ◽  
M. H. M. Baiea ◽  
S. F. EL- Gioushy
Keyword(s):  
Fruit Quality ◽  
Chemical Properties ◽  
Quality Parameters ◽  
Navel Orange ◽  
Fertilization Program ◽  
Washington Navel ◽  
Orange Fruit ◽  
Physical And Chemical ◽  
Orange Trees

This research was conducted during seasons 2018 & 2019 on nine-years-old Washington navel orange trees. These trees were grafted on Sour orange rootstock, planted at 5 x 5 meters apart, under surface irrigation conditions, in a private orchard at Manzala village, Toukh region, Qalubia Governorate, Egypt. The seven treatments were used for comparison as follows: T1-100% of chemical NPK (NPK fertilization program adopted at 5, 3 and 1 kg/tree from (NH4)2SO4, superphosphate and K2SO4, respectively) according to the Ministry of Agriculture Recommendation (Control or recommended doses RD). T2-RD+Calcium boron 2 cm3 /L; T3-RD+Calcium boron 3 cm3/L; T4-RD+Carpox-K 1g/L; T5-RD+Carpox-K 1.5g/L; T6-RD+Calcium boron 2 cm3 /L +Carpox-K 1g/L, and T7-RD+Calcium boron 3 cm3/L +Carpox-K 1.5g/L.  The main goal of this investigation was directed towards increasing Washington navel orange fruit quality. The obtained data revealed that all investigated treatments increased fruit quality parameters (physical and chemical properties). However, T7- RD + Calcium boron 3 cm3 /L + Carpox-K 1.5g/L was statistically superior. On the contrary, T1- Control or recommended doses (RD) ranked statistically the lowest treatment in this concern. From the obtained results, It can be concluded that the use of RD+ Calcium boron 3 cm3 / L + Carpox-K 1.5g / L or RD+ Calcium boron 2 cm3/ L + Carpox-K 1g / L could be safely recommended under similar environmental and horticultural practises adopted in this experiment.

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