Influence of foliar spray with some calcium sources on flowering, fruit set, yield and fruit quality of olive Kalmata and Manzanillo cultivars under salt stress

Abstract

Background This work was carried out through 2017 and 2018 seasons on Kalmata and Manzanillo olive cultivars. Trees were 15 years old, grown in sandy soil and planted at 5 × 5 m apart irrigated with saline water through drip irrigation system. This investigation aimed to improve flowering, fruit set, yield and fruit quality 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 number of inflorescences/shoot, no. of total flowers/inflorescences, sex expression, initial fruit set, final fruit set (%) and yield/kg (tree) and decreasing fruit drop (%) of olive oil Kalmata and Manzanillo cultivars compared with unsprayed in both seasons. 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 flowering, fruit set, yield and fruit quality.

Effect of Calcium Chelate and Carbonic Powder on Growth, Yield and Quality of Strawberry (Fragaria x ananassa Duch.) cv. Winter Dawn

“…This can contribute to healthier plants with improved flowering and fruiting, including during the first fruit set in strawberries. Same results were observed by Eman et al [15].…”

Effect of Pre-Harvest Sprays with Calcium and Ascorbic Acid on Fruit Quality of Olive

“…The obtained results concerning the effect of calcium chloride application on flowering and fruiting parameters go in line with Mikhail and Goargios (2014) on" Manzanillo" olive trees, they revealed that calcium play a significant role in fruit set and fruit development when calcium applied during pit hardening. Moreover, El-Hady et al (2020) pointed out calcium chloride or chelated calcium foliar spray at 0.5 % at the end of December improved flowering, fruit set of "Kalmata" and "Manzanillo" olive trees. The enhancement effect of calcium chloride application on flowering and fruiting parameters may be explained that calcium is important to regulate absorption other minerals to across plasma cell membranes.…”

“…In addition, calcium enhanced fruit set, fruit growth and maturation when foliar spray during pit hardening, it reduced fruit drop percentage as well as increased fruit weight and yield of "Manzanillo" olive trees (Mikhail and Goargios, 2014). Additionally, El-Hady et al (2020) mentioned that calcium chloride and/or chelated calcium foliar sprays at 0.5 % at the end of December improved fruit set, yield, fruit quality and oil content of "Kalmata" and "Manzanillo" olive trees. Moreover, Hagagg et al (2020a) indicated that foliar sprays of 0.5% chelated calcium at the end of December enhance vegetative growth and its mineral contents of "Kalmata" and "Manzanillo" olive trees.…”

Strategies for enhancing the growth and economics of Greengram

“…Foliar feeding is a popular technique for mitigating nutrient shortages in crop plants at critical growth phases. (El-Hady et al, 2020) [5] . Given the aforementioned information, a field experiment was conducted to ascertain the growth and economics of greengram.…”