تأثير رش مستخلص الطحالب البحرية و معاملات الحث الزهري في نمو و إنتاج محصول القرنابيط Brassica oleraceavar botrytis

الملخص EN

The research was conducted at two sites; the first site was in DiyalaProvince, Al Khalis District, inAl Mowafaq Agricultural company farm.

The second cite was in DiwaniaProvince, Al BarakatDistrict, in a private farm, during 2010-2011 growing season.

The objective of the experiment was to study the effect of; spraying with Marine algae extract (Algaton) in three concentrations (0, 1.5 and 2) ml.

L-1 coded (A0,A1 and A2) and the effect of applying flowering initiation treatments on growth and yield of cauliflower which comprised (control, vernalization, gibberellic acid GA3 and vernalization plus gibberellin treatments) ,coded (B1, B2, B3 and B4successively).

The adopted experimental design was Randomized Complete Block Design in three replicates.

The mean differences was analyzed using Duncan Multiple Range Test at the probability level 0.05.

The results showed that spraying the Marine algae extract increased significantly the vegetative characteristics compared with the control treatment.

Gibberellin treatment projected significant effect amongst the flowering initiation treatmentson vegetative growth characteristics at both sites.

The interaction between spraying Marine algae extract and flowering initiation treatments demonstrated significant effect on vegetative growth and yield characteristics at both sites.

The interaction treatment between spraying Marine algae extract atconcentration of 2 ml.

Land the gibberellin exhibited the highest means of growth characteristics (plant height, stem diameter, total leaves number, weight mean of flower stalks and the marketed yield) which gave (81.58 and 80.70) cm, (4.18 and 4.16) cm, (33.00 and 32.10) leaf.plant-1 (1.40 and 1.70) kg and (12.466 and 11.733) ton.

Donem-1 , for both sites successively.

The results showed that spraying Marine algae extract concentration1.5 ml.1 speeded up flower stalk maturity,in comparison with the other treatments.

While the flower initiation treatments,vernilization B2 was the fastest in flower stalk maturation, in comparison with the rest of the flower initiation treatments.

The interaction between Marine algae extract and flower initiation showed significant effect, spraying with concentration of 1.5 ml.

L-1 and vernilizationtreatment was the fastest in flower stalk maturation.

The results also showed that spraying Marine algae extract with concentration 2ml.

L-1 gave the highest means of flower stalk colour characteristic, flower stalks compaction.In regards to the flowering initiation treatment, the gibberellin plusvernilization treatment gave the highest meansin flower stalk colour and compaction characteristics.

Meanwhile the interaction between the Marine algae extract and flowering initiation treatment showed significant effect, the treatment of 2ml.1L-1 and gibberellinandtogether with vernilization gave highest means of flower stalk colour and compaction, at the two sites.