A preliminary study on inducing naomi mango trees to produce an additional crop

Abstract EN

The present study was conducted on 7 years old Naomi mango trees budded on Succary rootstock, grown under drip irrigation in sandy soil orchard at Wady EL-Natroon, EL-Behaira Governorate, Egypt during (2019-2020) and (2020-2021) seasons.

Specific and interaction effects of shading with ceroon net, inflorescence thinning and their combinations were investigated.

Most evaluated parameters responded specifically to shading application i.

e.

, two yield measurements (No.

& weight of fruits /tree), fruit weight, pulp% , TSS% and TSS/Acid ratio of shaded trees were significantly higher than those of non shaded ones.

Meanwhile, total sugars and vitamin C did not respond considerably.

Such trend was detected with both common and additional crops.

As for the specific effect of inflorescences thinning application both crops followed two conflicted trends.

With the secondry (additional) crop thinning especially at 50% increased it obviously (10 times much more as control), while decreased its most fruit quality (fruit weight, pulp% , TSS% , total sugars% and vitamin C content).

The revers was detected with the common crop parameters.

Concerning interaction effect, specific effect of each factor reflected on their combinations, whereas the greatest yield values (No.

& weight /tree) of the secondry crop was significantly coupled with the 50% thinned trees under shading application.

While, good fruit quality was exhibited by the common crop of the nonthinned trees especially shaded ones.