ABSTRACT
This research was carried out at the experimental Farm, Faculty of
Agriculture, Al-Azhar University, Assiut, during the two successive seasons
of 2018 and 2019 aiming to study the influence of filter mud as organic
manure stimulant substances namely (amino acids {tryptophan +
methionine}, active yeast and seaweed extract), as well as, their Interactions
on plant growth traits and chemical constituents of Khaya (Khaya
senegalensis) seedlings. The soil of Khaya seedlings was supplied with filter
mud at 0, 18, 36 and 54 g/bag and the seedlings were sprayed with stimulant
substances, whereas the treatments of these materials were: control, amino
acids at 100 ppm, active yeast at 5 g/l, seaweed extract at 3 ml/l, amino acids
+ active yeast, seaweed + active yeast, amino acids + seaweed extract and
amino acids + active yeast + seaweed extract. The obtained results indicated
that applying filter mud at all levels led to a significant increase in vegetative
growth traits (stem length, stem diameter, leaves dry weight / seedling and
stem dry weight / seedling) as well as , the elements of N, P and K %, except
for the low level of filter mud (18 g/bag), in some cases. the highest values
of these parameter were detected when adding filter mud at the high level
(54 g /bag). Foliar spray with the examined stimulant Substances, in many
cases, either separately or mixed resulted a significant augment in the
studied traits. Clearly, bitter results were noticed by treating the seedlings
with the triple combined treatment (amino acids + active yeast + seaweed
extract) and the double combined treatment (amino acids + seaweed
extract). the most of combined treatments significantly increased the growth
traits and N, P and K %. Obviously, the most effective combined treatments
of examined characters, in many cases were detected from supplying the
seedlings with the high level of filter mud ( 54 g/bag ) followed by filter
mud at the moderate one ( 36 g/ bag ) in combination with the triple
combined treatment (amino acids + active yeast + seaweed extract) and the
double combined treatment (amino acids + seaweed extract).