تأثير حامض الجبرلين ( GA3)‎ في حاصل نبات الكجرات Hibiscus sabdariffa L.

الملخص EN

The experiment was conducted in a private field at Al – Bargah district ( 30 Km ) North east Kerbela city from March 25th to October 15th , 2004 .

The aim of the experiment was to assess the effect of spraying date and different levels of gibberellic acid (GA3) (i.e.

0,100 ,200 and 300 mg/l) on the The treatments were applied either at ( 4 -6 ) leaf stage or before flowering stage of plants .

Randomized Complete Block Design ( R.

C.

B.

D.

) with three replications was adopted .

The least significant difference ( L.

S.

D.

) at !.05 probability level was used as a method of mean separation wherever the treatment effect was evident .

Results could be summarized as follow : 1.

The first date of spraying led to a significant increase in dry weight of sepals and dry weight of seeds , whereas , the second date of spraying led to an increase in number of fruits , fresh weights of fruits and sepals .

2.

Increasing gibberellic acid concentration caused a significant increase in the above mentioned characteristics .

3.

The interaction between the date of application and concentrations of gibberellic acid showed a significant influence on number of fruits , fresh weight of fruits , fresh and dry weight of sepals and dry weight of seeds .