Impact of shading and foliar spray with some nutritive solutions on growth, nutritional status, productivity and fruit quality of keitt mango trees

الملخص EN

Present study was carried out on 7 years old Keitt mango trees budded on Succary rootstock, grown under drip irrigation in sandy soil orchard located at Wady EL-Natroon, EL-Behaira Governorate, Egypt during 2019 and 2020 seasons.

Factorial experiment was conducted to investigate specific and interaction effects of tree shading with ceroon net combined with foliar spray of 9 N, P, K, Ca, Mg nutritive solutions on some growth, nutritional status, yield and fruit quality (physical & chemical properties) of Keitt mango cv.

Data obtained revealed that, most evaluated parameters responded specifically to both studied factors (shading & foliar nutrition treatments).

Hence, all growth parameters, leaf N, P, K% , yield (No.

& weight), fruit physical (weight & pulp % ) and fruit juice chemical properties (TSS, TSS/Acid ratio, total sugars and v.

c) contents were increased by shading application.

Moreover, all nutritive solutions improved the abovementioned parameters than control (water spray).

However, both T9 (fertifeed Ca, Mg-COOH + fertifeed P, K-COOH) and T5 (Fertifeed phosphy-K COOH) and to great extent T7 (Carpox-K COOH + NH₄NO₃) were the superior.

Accordingly, specific effect of each factor (shading & nutritive solutions) reflected certainly on their combinations whereas spraying shaded Keitt mango trees with T9 (fertifeed Ca, Mg-COOH plus fertifeed P, K-COOH) and / or T5 (Fertifeed P-K COOH) nutritive solutions exhibited statistically the greatest beneficial effects on their various evaluated growth, nutritional status, yield and fruit quality parameters.