Effect of foliar application of boron trioxide and zinc oxide nanoparticles on leaves chemical composition, yield and fruit quality of Olea europaea L. cv. Picual

Abstract

Background and objective Olive tree is one of the most important and a widely distributed tree grown in many arid and semi-arid areas of the world. The production of olive in these areas is generally low due to the poor soil fertility. Zinc is one of the essential micronutrients for plants, and its deficiency is common in many crops. Boron deficiency is also a common micronutrient problem in agriculture, which results in reducing of yield production and quality. Nanotechnology has emerged as one of the most innovative scientific field in agriculture. So the objective of this work is determine the appropriate concentration of nano-zinc and nano-boron to reach the best olive fruits yield and improve its chemical and morphological traits. Materials and methods The present investigation has been made during two successive seasons of 2017 and 2018 in a private orchard located at Ismailia governorate, Egypt, to study the effect of foliar application of boron nanoparticles at a rate of 10 and 20 ppm and zinc nanoparticles at a rate of 100 and 200 ppm on leaf chemical composition, yield, and fruit quality of Picual olive tree. Results The application of boron and zinc nanoparticles in different concentration was able to effect on the qualitative and quantitative characteristics of Picual cultivar in the first and second seasons, respectively, compared with the control treatment leaves mineral content and pigments, fruit set percent, fruit drop percent, fruits yield, fruit physical, and chemical characteristics. Moreover, spraying Picual cultivar with nano-boron at 20 ppm + nano-zinc at 200 ppm (T8) is the best treatment in this study to obtain the maximum final fruit set which led to harvest the maximum fruits yield with the high seed oil percentage and low acidity in the first and second seasons, respectively. Conclusion It could recommend that spraying Picual olive trees with nano-boron at 20 ppm + nano-zinc at 200 ppm is the best treatment in this study to obtain the maximum final fruit set which led to harvest the maximum fruits yield with the high seed oil percentage and low acidity.

Improvement of Growth, Yield, Seed Production and Phytochemical Properties of Satureja khuzistanica Jamzad by Foliar Application of Boron and Zinc

“…The highest B concentration (19.19 and 19.96 mg.kg-1 in the first year and second year, respectively) was obtained by 0.8% B spray (Table 4, 5). A significant difference was also observed between Zn treatments in terms of the Zn content of leaves (Supplementary Table 4,5). The application of 0.6% Zn recorded the highest Zn content in the leaf (25.22 and 27.55 mg.kg-1 in the first and second years, respectively), while the lowest content was observed in the control in both experimental years (Table 4, 5).…”

“…Micronutrients, found in small amounts in plants, play an important role in plant growth and development, as well as in the yield and quality of products [4]. Zinc (Zn) is one of the most important micronutrients for plants and acts as a functional, structural or regulatory cofactor for cell membrane stability, chlorophyll, cytochrome, protein and auxin synthesis, the activation of enzymes (dehydrogenases, aldolases, isomerases, transphosphorylases, RNA and DNA polymerases), photosynthesis and cell transparency [4][5][6][7]. It also plays an important role in the transport of metabolites between plant organs.…”

Nano-Fertilization as an Emerging Fertilization Technique: Why Can Modern Agriculture Benefit from Its Use?

“…Ibrahim et al sprayed90–180 mg/L of B NPs on mung bean crops, and they reported higher number of pods per plant and a greater seed yield compared to a control (B metal) [ 135 ]. Likewise, Genaidy et al [ 136 ] sprayed nano-boron at 20 ppm and nano-zinc at 200 ppm on olive trees, and the plants yielded a maximum number fruits with a high seed oil content. Similarly, Davarpanah et al [ 134 ] reported a greater number of fruits and a higher yield in in pomegranate ( Punica granatum ) after the application of B nanofertilizer (34 mg B per tree −1 ).…”

Effects of Edaphic Fertilization and Foliar Application of Se and Zn Nanoparticles on Yield and Bioactive Compounds in Malus domestica L.

“…According to the results, the foliar application of Zn and Se NPs influenced higher yields in apple production. Some studies have reported that the application of ZnO NPs had a positive effect on the yields of pomegranate [25], mango [12], olive [24], melon [38], strawberry [39], and grapes [40]. Zn is an essential element that acts as an enzyme activator for many metabolic processes.…”

“…In fruit trees, nanoparticles increased the vegetative growth and improved the reproductive growth and flowering, thereby increasing the productivity and fruit quality [23]. Genaidy et al [24] obtained a higher yield of olive fruits, with a high percentage of oil in the seed and low acidity, with foliar applications at 20 ppm of NP B 2 O 3 plus 200 ppm of NP ZnO. Elsheery et al [12] reported increased nutrient absorption after combined applications of ZnO and Si nanoparticles, which positively modified the growth, productivity, and quality of mango fruits.…”