The influence of biofertilization with phosphorene at 5,10r and 15 gltree.
pottassine at 250, 500 and 1000 ppm and active bread yeast at 0.4. 0.8 and 1.0% on
leaf mineral content, yield as well as physical and chemical properties of Zebda and
Langra mango fruits was investigated during 2003 and 2004 seasons.
Obtained results showed that application of phosphorene at 5 to 15 g/trae,
pottassine at 250 to 1000 ppm and active bread yeast at 0.4 to 1.0% was very
effective in enhancing nutritional status of the trees, yield as well as physical and
chemical characters of the lruits in Zebda and Langra mango trees. The promotion
was associated with increasing the applied rates. Application of active bread yeast
and pottassine was superior than phosphorene in improving all studied parameters,
except 13%, No practical influence on the investigated parameters was observed when
using higher rates of phosphorena (10 and isgr‘tree,) pottassine (500 and 1000
ppm) and active bread yeast (0.8 and 1.0%)
From the economic point of view, the best results with regard to nutritional
status of the trees, yield and fruit quality were obtained when Zebda and Langra
mango trees biotertilized three times with active bread yeast at 0.8% or three times
with pottassine at 1000 ppm or phosphorene at 10.0gitree once.