ABESTRACT
A field experiment was carried out during winter season 2018 /
2019 in Maryout the agriculture experiment station of the Desert
Research Center, south west Alexandria, Egypt to study the influence of
foliar application of Humic acid, mixture of Amino acids and Active dry
yeast and their interaction on the productivity and chemical contents of
Egyptian clover (var. Meskawey) grown in calcareous soil. The
experiment was planned in a split- split plot design with three replicates.
The main plots were applying foliar spay of Active dry yeast include
three levels ( 0 , 2 , 4 g / L ) ,the subplots included foliar spray of three
levels of Humic acid ( H ) , i.e. ( 0 , 2 , 4 ml / L) and sub –sub plots was
the mixture of Amino acid (A) spayed at rates ( 0 , 2 , 4 ml / L ) . Foliar
spray of the studied treatments were added using four doses , first after
25 days from planting , 2nd ,3rd. and 4th after 10 days of each cutting .
Results showed that spraying Egyptian clover 4 through times of
bio stimulators active dry yeast (4 g /L), combined with humic acid (4 ml
/L ) and amino acid ( 4 ml /L) were the most effective treatment in
improving fresh and dry forage yields ton /fed, which recoded ( 46.88
and 8. 52 ton / fed), respectively through the whole season and which
record the highest protein % were 15.4 , 18 , 18.2 and 18.6 % for the
1st , 2nd, 3rd and the 4th cuts , respectively. Also, this treatment recoded
the highest values of nitrogen, potassium, phosphorus as concentration
and uptake in the dry forage of Egyptian clover.