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

Abstract

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.

Engineered Nanomaterials for Improving the Nutritional Quality of Agricultural Products: A Review

“…El-Gioushy et al used Washington navel orange trees as the research object and sprayed ZnSO 4 (0 mg/L, 300 mg/L, 600 mg/L) solution on the leaves. The results showed that ZnSO 4 could improve the growth, nutritional quality, and productivity of Washington navel orange trees [ 35 ]. Recent research has demonstrated that the use of mepiquat chloride (MC) can significantly boost the nutrient content and biological accumulation in seeds under the control circumstances of boron deficiency and sufficient boron, boosting the yield and nutritional quality of seed cotton [ 36 ].…”

Active Bionanocomposite Coating Quality Assessments of Some Cucumber Properties with Some Diverse Applications during Storage Condition by Chitosan, Nano Titanium Oxide Crystals, and Sodium Tripolyphosphate

“…The reducing and total sugars from cucumber samples of each group were triplicatedand evaluated using a UV-Vis spectrophotometer (Max M2, San Jose, CA, USA) [27][28][29]. An aliquot of freeze-dried samples in liquid N 2 was refluxed with 100 mL alkaline solution of copper salt, boiling for 30 min [30].…”

Physiological and Ultrastructural Responses to Excessive-Copper-Induced Toxicity in Two Differentially Copper Tolerant Citrus Species

“…The soil copper (Cu) contamination induced by the over-application of Cu-based agrochemicals is a primary environmental and toxicological concern for sustainable agriculture [ 1 , 2 ]. In citrus orchard management, Cu-plus fungicides (such as Bordeaux mixture) and micronutrient fertilizers are frequently foliar-sprayed for pathogen controlling and nutrient adjustment, respectively [ 3 , 4 ]. The Cu-containing solution dripped from the trees or washed by precipitation increased the Cu concentration of the topsoil.…”