Improving the yield and fruiting characteristics of Ewais Mango Cultivar by spraying with Nano-chitosan and Nano-potassium silicate

Abstract

This study was carried to improve flowering, productivity and fruit quality of the Ewais mango cultivar by foliar spraying with Nano-chitosan and Nano-potassium silicate. This trial included seven treatments, before flowering selected trees were sprayed with Nano-chitosan at 50, 100 or 150 ppm, Nano-potassium silicate at 0.4, 0.6, 0.8g/L and control treatment. Under this experiment conditions, the Ewais mango cultivar showed a positive response to the treatments with Nanoparticles, whether for chitosan or potassium silicate, compared to the untreated trees, which gave the lowest results in the characteristics related to flowering, fruit set, yield, fruiting characteristics and the leaves content of chlorophyll, zinc, and potassium. Spraying Nano-potassium silicate at 0.6 and 0.8 g/L were more effective in increasing panicle length and decreasing floral malformation in addition to achieving the highest yield and the best fruit characteristics as compared with un-treated trees. Also, Nano-potassium silicate at 0.8g/L was more effective in enhancing final fruit set than other treatments. Furthermore, spraying the trees with chitosan at a concentration of 50 or 100 ppm showed the nearest or same results as those achieved with Nano-potassium silicate. Application with Nanoparticles of chitosan at a concentration of 50 or 100 ppm lead to improve leaves content of chlorophyll, zinc, and potassium. It is recommended spraying Ewais mango with Nano-potassium silicate at 0.6g/L or Nano chitosan at 100 ppm which decreased floral malformation and achieved the highest yield & the best fruit characteristics.

Effect of Nano NPK Fertilizers on Growth and Fruit Quality of Sapota (Manilkara achras Mill Fosberg) Cv. Kalipatti

“…Increased TSS of fruit may be due to nano-fertilizers application, as these nanoparticles have unique in behavior and characteristics, such as small size, targeted delivery of nutrients and highly active area, which increased the rapidity of fruit chemical reactions and also would have activated many enzymes involved in the biochemical pathways such as carbohydrate metabolism and protein. These results are in line with Davarpanah et al (2016) in pomegranate, Roshdy and Refaai (2016) in date palm and Mohamed Gad et al (2021) in mango.The decreased level of acidity was observed in nano-fertilizers sprayed fruits might be due to these nano-fertilizers absorbed easily by plant and translocated into the different parts of the plants especially the potassium application resulted in reduced acid content of the fruits. These results are similar with the findings of Abdelaziz et al (2019) in mango.…”

Influence of Selenium, Titanium, and Silicon Nanoparticles on the Growth, Yield, and Fruit Quality of Mango under Drought Conditions

“…In another study, it was documented that the leafy spraying of Si NPs on mango at 50, 100, and 150 mg L −1 throughout the complete flowering time and one month later raised the leaf NPK content, total carbohydrates, and proline under salinized drainage water [111]. The leafy application of K 2 SiO 3 NPs on mango trees markedly increased the flowering rate, chlorophyll content, fruit set percentages, panicle length, and the fruit yield, while it decreased the floral malformation in mango [112].…”