scholarly journals IRRIGATION AND FERTILIZATION PROGRAMS FOR "WASHINGTON NAVEL" ORANGE TREES IN SANDY SOIL UNDER DESERT CLIMATIC CONDITIONS. 1- EFFECT ON SOIL PROPERTIES, VEGETATIVE GROWTH AND YIELD

2016 ◽  
Vol 42 (2) ◽  
pp. 210-233
Keyword(s):  
Soil Properties ◽  
Sandy Soil ◽  
Vegetative Growth ◽  
Climatic Conditions ◽  
Growth And Yield ◽  
Navel Orange ◽  
Washington Navel ◽  
Orange Trees

scholarly journals MITIGATION OF HEAT STRESS EFFECTS BY USING SHADE NET ON WASHINGTON NAVEL ORANGE TREES GROWN IN AL-NUBARIA REGION, EGYPT

2020 ◽  
Vol 19 (3) ◽  
pp. 15-24
Author(s):  
Saied Kamel Mohamed Abd El-Naby ◽  
Abdel Monem Ahmed Mohamed Esmail ◽  
Mohamed Hemdan Mohamed Baiea ◽  
Osama Abd El-Fattah Amin ◽  
Amr Abdelkhalek Ahmed Mohamed
Keyword(s):  
Sandy Soil ◽  
High Temperature Stress ◽  
Tree Canopy ◽  
Soluble Solids ◽  
Navel Orange ◽  
Acid Yield ◽  
Stress Effects ◽  
Washington Navel ◽  
The Face ◽  
Orange Trees

High temperature stress can be detrimental to plants, resulting in reduced fruit yield and increased incidences of fruit disorders. One strategy that farmers can use to maintain or increase their yields in the face of a changing climate is to adjust of farm climate by using shade net on the trees. Such, the use of shade netting on Washington navel orange planted on the sandy soil in Al-Nubaria region, Egypt were studied during two successive seasons, either using a permanent shade throughout all the season or using a moveable shade for certain period from the first of March until the end of June for every season. Growth (No. of shoots/one meter branch, No. of leaves/shoot, shoot length and chlorophyll content of the leaves, leaf area and tree canopy), macronutrients (N, P, K, Ca, Mg) and micronutrients (Fe, Zn, Mn, Cu, Na) content in the leaves, fruit characteristics (number, weight, diameter, peel thickness, total soluble solids, total acidity and ascorbic acid), yield and crop efficiency, were determined. It can be concluded that covering Washington navel orange trees grown on sandy soil with shade net especial covering the trees for certain period was very effective at protecting orange trees and led to improve the growth, increase the yield and maintain fruit quality.

scholarly journals Foliar Application of ZnSO4 and CuSO4 Affects the Growth, Productivity, and Fruit Quality of Washington Navel Orange Trees (Citrus sinensis L.) Osbeck

Horticulturae ◽  
2021 ◽  
Vol 7 (8) ◽  
pp. 233
Author(s):  
Sherif Fathy El-Gioushy ◽  
Rokayya Sami ◽  
Amina A. M. Al-Mushhin ◽  
Hanan M. Abou El-Ghit ◽  
Mohamed S. Gawish ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Fruit Quality ◽  
Vegetative Growth ◽  
Foliar Application ◽  
Foliar Spray ◽  
Navel Orange ◽  
Effective Response ◽  
Washington Navel ◽  
Orange Trees

The goal of this study was to examine how to improve the vegetative growth, nutritional status, productivity, and fruit quality of Washington navel orange trees by examining the effect of foliar application of ZnSO4 (0, 300, and 600 mg/L) solutions in combination with CuSO4 (0, 200, and 400 mg/L) solutions on Washington navel orange trees, which were 11 years old and grown in clay loam soil with a surface irrigation system. The results showed that all the investigated measurements responded specifically to each investigated factor. ZnSO4 elicited a stronger and more effective response than CuSO4. Nonetheless, the response varied only slightly or moderately from one measurement to the next. In terms of the interaction effect between ZnSO4 and CuSO4 concentrations, the effect of each investigated factor was directly reflected in its combinations, with ZnSO4 (600 mg/L) and CuSO4 (200 and 400 mg/L) being the most effective for the majority of the measurements under consideration. When the highest level of ZnSO4 was combined with the highest level of CuSO4, the highest values for the various vegetative growth parameters shoot length and diameter, number of leaves per shoot, leaf area, and total assimilation area per shoot were obtained. As a result, the nutritional status (the highest total leaf chlorophyll and leaf mineral contents) was significantly coupled with the treatment of 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4. Moreover, the combinations of the highest ZnSO4 concentration (600 mg/L) and CuSO4 concentration (400 mg/L) exhibited the greatest statistical values of the measurements of fruiting aspects as well as fruit quality. Consequently, it can be recommended that using 600 mg/L ZnSO4 in combination with 400 mg/L CuSO4 as a foliar spray on monthly basis during the period from March to July could be safely recommended under similar environmental conditions and horticulture practices adopted in the present experiment.

scholarly journals Foliar Application of Nano, Chelated, and Conventional Iron Forms Enhanced Growth, Nutritional Status, Fruiting Aspects, and Fruit Quality of Washington Navel Orange Trees (Citrus sinensis L. Osbeck)

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2577
Author(s):  
Sherif F. El-Gioushy ◽  
Zheli Ding ◽  
Asmaa M. E. Bahloul ◽  
Mohamed S. Gawish ◽  
Hanan M. Abou El Ghit ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Vegetative Growth ◽  
Citrus Sinensis ◽  
Arid Regions ◽  
Foliar Spray ◽  
Fruit Production ◽  
Navel Orange ◽  
Washington Navel ◽  
Orange Trees ◽  
Iron Forms

Iron (Fe) is required for most metabolic processes, including DNA synthesis, respiration, photosynthesis, and chlorophyll biosynthesis; however, Fe deficiency is common in arid regions, necessitating additional research to determine the most efficient form of absorbance. Nano-fertilizers have characteristics that are not found in their traditional equivalents. This research was implemented on Washington navel orange trees (Citrus sinensis L. Osbeck) to investigate the effect of three iron forms—nano (Fe-NPs), sulfate (FeSO4), and chelated (Fe-chelated)—as a foliar spray on the growth, fruiting aspects, and nutritional status of these trees compared to control. The highest values of the tested parameters were reported when the highest Fe-NPs level and the highest Fe-chelated (EDTA) rate were used. Results obtained here showed that the spraying of the Washington navel orange trees grown under similar environmental conditions and horticulture practices adopted in the current experiment with Fe-NPs (nanoform) and/or Fe-chelated (EDTA) at 0.1% is a beneficial application for enhancing vegetative growth, flower set, tree nutritional status, and fruit production and quality. Application of Fe-NPs and Fe-chelated (EDTA, 0.1%) increased yield by 32.0% and 25% and total soluble solids (TSS) by 18.5% and 17.0%, respectively, compared with control. Spraying Washington navel orange trees with nano and chelated iron could be considered a significant way to improve vegetative growth, fruit production, quality, and nutritional status while also being environmentally preferred in the arid regions.

Growth and yield of orange (Washington Navel 141) grafted on different citrus rootstocks

2020 ◽  
Vol 12 (3) ◽  
Author(s):  
Alaa Suhiel Ibrahim
Keyword(s):  
Soluble Solids ◽  
Growth And Yield ◽  
Sour Orange ◽  
Fresh Weight ◽  
Experimental Station ◽  
Section Area ◽  
Washington Navel ◽  
Orange Trees ◽  
Cleopatra Mandarin ◽  
Troyer Citrange

Abstract. This investigation was conducted during 2014, 2015 and 2016 in the field of the citrus experimental station in Ciano, the general corps of scientific agricultural researches. The growth and yield of orange trees (Washington navel 141) budded on seven citrus rootstocks (Sour orange, Troyer citrange, Carrizo citrange, Citrumelo 4475, Citrumelo 1452, Macrophylla and Cleopatra mandarin) and farmed since 1989 have been studied. The results for the average of yield showed that the trees grafted on Cleopatra mandarin (58.33 kg. tree-1) were significantly superior to those grafted on Macrophylla (34.17 kg. tree-1). Orange trees grafted on Citrumelo 4475 and Citrumelo 1452 were significantly superior to other treatments in trunk section area of the rootstock (922.41 and 841.02 cm2, respectively). The greatest fruit fresh weight was in trees grafted on Citrumelo 4475 (284.85 g. fruit-1) which were significantly superior to those grafted on Carrizo and Troyer citrange (232.49 and 236.06 g. fruit-1, respectively). The biggest total soluble solids (%) was in trees grafted on Carrizo and Troyer citrange (12.83% for both treatments) which were significantly superior to those grafted on Sour orangе and Macrophylla (11.5% for both treatments), while the greatest total acids (%) was by Sour orange (2.08%) without significant differences.

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