Ameliorative effect of foliar application of calcium on vegetative growth and mineral contents of olive trees Kalmata and Manzanillo cultivars irrigated with saline water

Abstract

Background: This work was carried out through 2017 and 2018 seasons on tow olive cultivars (Kalmata and Manzanillo). Trees were 15 years old, grown in sandy soil, planted at 5 × 5 m apart, and irrigated with saline water through drip irrigation system. This investigation aimed to improve vegetative growth and its mineral contents of the tow olive cultivars. Trees were sprayed with calcium at 0.5% as calcium chloride (21% Ca) and chelated calcium. Results:The results revealed that there were significant differences with calcium source treatment regarding vegetative growth and leaf mineral contents. Conclusions: Results proved that olive trees sprayed at the end of December with 0.5% calcium as chelated calcium was the promising treatment for good vegetative growth and leaf mineral contents.

Effect of Integration Vermicompost and Nano-Fertilizer on Fig Seedlings Growth and Soil Health

“…However, conventional fertilizer produced the lowest value of leaf fresh weight. Also Hagagg et al [22] noted that olives leaf fresh weight has increased significantly with increasing Nano-fertilizers doses at same level of conventional fertilizer (whether 1, 0.5 or 0.25g/seedling/week). 2) shows that high level of Nanofertilizer increased lea dry weight of fig crop.…”

“…Obtained results were in same line with finding of Mustaf et al, [21] who noticed for fig leaf dry weight, the highest value of dry weight was recorded with both (300 and 400 ppm of Nano-fertilizer) and the lowest value for leaf dry weight was recorded with conventional fertilizers at (500 ppm) . In addition (Hagagg, et al [22] reported that spraying Nano-fertilizers at high level produced the highest value of olives leaf dry weight (19.8) comparing with other levels of Nanofertilizers. ) obtained when vermicompost applied at (1500g/seeding) + Nano-fertilizer (400 ppm).…”

“…Also, the highest leaf P content was obtained with treatment (vermicompost 1000g/seedling + 400 ppm nanofertilizer). Hagagg et al [22] noted that high level of phosphorus was recorded with applying nanofertilizer at (0.2%) without significances differences with other concentrations of nanofertilizer. These results revealed that, there was a capacity for absorption foliar fertilizer through leaves and increasing concentration of foliar fertilizer will have a positive reflection on nutrient status in leaf.…”

“…However Mustafa et al, [21] reported that nitrogen content improved with applying Nanofertilizers and no markedly differences with control. Hagagg et al [22] noted that level of nitrogen in olive leaves were raised with increasing doses of sprayed nano-fertilizer and higher results recorded with high concentration of nano-fertilizer (0.2%). In (Table 5), it can be noticed that low level of nano-fertilizers led to increasing in leaf K content (2.14%) comparing with high level of these type of fertilizer [15].…”

“…For impact of gathering vermicompost and nanofertilize on leaf K content, data showed that treatment (vermicompost at 1500 g/seedling + 200 ppm of nano-fertilizer) resulted in the highest leaf K content than other treatments. On the other hand the highest leaf potassium content produced with applying conventional fertilizers at (1 g/seedling/week) in combination with nanofertilizers at (0.2%) as foliar application [ 21,22]. Table 6 howed that high level of nano-fertilizers (400ppm) produced higher level of leaf P content (0.35) comparing with 200ppm of nano-fertilizer that produced (0.25%).…”