This study was carried out at the experimental orchard, Faculty of Agriculture, Assiut University, Egypt, to investigate the effect of boron, zinc and silicon foliar spray on growth and fruiting of Balady mandarin trees during 2016 and 2017 seasons.The experiment was arranged in a randomized complete block design with three replications per treatment, one tree each. Boric acid (17% B), zinc sulphate (23% Zn) and potassium silicate (25% Si + 10% K 2 O) were sprayed three times on March, May and August. The obtained results could be summarized as follow:Spraying either boron, zinc or silicon singly or in combination significantly increased the growth traits and the total chlorophyll as well as the total carbohydrates, nitrogen content and C/N ratio of shoots compared to water spraying (control).The maximum values of these traits were recorded on trees that were sprayed with combination of 0.025% boron, 0.050% zinc and 0.10% silicon followed by silicon, zinc and boron spray, boron or zinc as well as zinc or silicon.All treatments significantly increased the fruit retention percentage and yield/tree compared to the untreated one.All foliar application treatments improved the fruit quality in terms of increasing the fruit weight, pulp percentage, total soluble solids, sugar and vitamin C contents and decreasing the total acidity compared to spraying water (control). The best fruit quality was recorded when the trees were sprayed with combination of boron, zinc and silicon.It is evident from the foregoing results that the foliar application of boron, zinc, silicon alone or combination improved the tree nutrient status, yield and fruit quality.As a conclusion it is suggested to use boric acid at 0.050%, zinc sulphate at 0.10% and potassium silicate at 0.2% (as a source of silicon) alone or a combination of boron 0.025, zinc 0.050 and silicon 0.10% three times during growth season for improving the growth and fruiting of Balady mandarin trees.
This study was carried out during 2011 and 2012 seasons on "Manfalouty" pomegranate cv. grown at the experimental orchard of Pomology Department, Faculty of Agriculture, Assiut University. The objectives of this study were examining the effects of pre-harvest spray with CaCl 2 (4%) and GA 3 (100 ppm) as well as post-harvest treatments with jasmine oil (2.5 cm 3 /L), olive oil (2.5 cm 3 /L), fiber gard (20 cm 3 /L) and wrapping individually fruit with food polyolefin stretch as an improving effect in physicochemical characteristics of "Manfalouty" pomegranate cv. during storage under room temperature (22+5°C). The experiments were set up on split-plot arrangements in complete randomized block design (CRBD), with three replicates, 20 fruits each. According to the obtained results of this study, it could be deduced that pre-harvest spray with GA 3 (100 ppm) gave in general, the best results on improving physical and chemical characteristics, followed by CaCl 2 (4%) during the two growth seasons, as well as wrapping individually fruits with food polyolefin stretch gave the best quality during shelf-life period, followed by dipping fruits in both jasmine oil or olive oil and fiber gard during fruit storage under room temperature. Therefore, the authors recommended with wrapping individually fruits to keep fruits with good quality during fruit storage under room temperature.
This study was carried out at the Experimental Orchard, Faculty of Agriculture, Assiut University, Egypt, to study the effect of Gibberellic Acid (GA 3), Naphthalenacetic acid (NAA), calcium chloride and zinc sulphate spraying on fruiting of Manfalouty pomegranate during 2017 and 2018 seasons. The experiment was set up in a complete randomized block design with three replicates, one tree per each. GA 3 , NAA, calcium chloride (CaCl 2) and zinc sulphate (ZnSO 4) spraying significantly increased the yield/ tree compared to unsprayed ones. GA 3 spraying gave the highest yield followed by calcium chloride. On the other hand, all treatments significantly decreased the fruit cracking percentage compared to unsprayed ones. The least fruit cracking was recorded due to calcium chloride spraying. All treatments significantly increased fruit weight and fruit dimensions as well as pulp percentage and juice contents compared to unsprayed ones. Moreover, calcium chloride and zinc sulphate as well as combination of GA 3 or NAA with them significantly improved the fruit chemical constituents, whereas, GA 3 spraying alone decreased the chemical fruit constituents compared to unsprayed ones. It could be concluded that spraying Manfalouty pomegranate trees with calcium chloride (CaCl 2) at 2% and zinc sulphate at 0.025% plus GA 3 at 50 ppm or NAA 25 ppm thrice was necessary to get high yield, reduce the fruit cracking percentage and improve fruit quality.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.