STUDIES ON MANGO NUTRITION

Abstract

This investigation was conducted on 6 month old, potted mango seedlings in the green house of the Plant Res. Dept, Nuclear Res. Cent., Atomic Energy Authority at Enshas region, Sharkia Governorate. It aimed to investigate the influence of soil drench applied rates in combination with various zmc rates of phosphorus applied either as soil drench "experiment, I" or foliar sprays "experiment, II" on mango seedlings regarding the response of their growth measurements and nutritional status during both 1997 and 1998 seasons. Moreover, absorption, translocation and utilization of the radioactive isotope of zinc (Zn-65) foliar applied in relation to concentration of zinc solution and P soil applied rate was also studied "experiment, III" during 1999 year.

V.I. Experiment, 1: Growth and nutrieional status of mango seedlings in relation to various levels of both phosphorus and zinc soil drench application:

In this experiment sixteen fertilization treatments represented the various combinations between four soil application rates of both phosphorus (0.0, 25.0, 50.0 and 100 ppm) and zinc (0.0, 5.0, 10.0 and 20.0 ppm) were investigated pertaining the specific effect of each fertilizer element and interaction effect of their combinations on growth and mineral composition of 6 month old mango seedlings grown in plastic containers filled with 10 kg of sand+ clay mixture (2:1, v/v).