تأثير التسميد بالمخصب الحيوي Em-1 و حامض الهيومك في الصفات الكيميائية لشتلات البرتقال المحلي (Citrus Sinensis L. Osbeck)‎ المطعمة على أصل النارنج

Abstract EN

The study was carried out in certified.

Citrus production nursery at AL-Hindiyah district-Kerbala during 1/3 to 1/12/2017 on the seedlings of local orange at 6 months age that grafted on Local orange rootstock.

The effect of EM-1 bio fertilizer with four con concentrations 0, 10, 15, 20 ml.

L and humic acid with four concent rations 0, 3, 4.5 ml.

L and their combinations on total chlorophyll content, carbohydrates, and some nutrients as well as some soil chemical properties were studied.

The R.

C.

B.

D design was used in this experiment as factorial one with two factors and the means were compared by least significant difference L.

S.

D at 0.05 probability level.

The results revealed that, the spraying of seeding's with the treatments, individually or combined, resuled in a significant increase in total chlorophyll content, carbohydrates, nitrogen and phosphorus concentration in leaves, available phosphorus and soil pH.

the superiority was at the treatment (5 ml.

L humic acid + 20 ml.

L EM-1) which gave the highest values of those parameters which were 53.61 mg.

100 g-1 fresh weight, 6.25 mg.

g-1 dry weight, 2.3 % , 0, 615 % , 17.76 mg.

g-1 and 6.30 respectively as compared with control