Abstract

An experiment was carried out in a greenhouse at Agricultural Research Station in Bani
Maqan, which is belonged Chamchamal Agriculture Directorate in Sulaymaniya Governorate, The
factorial experiment was conducted in a randomized complete block design, with three replications.
Where the seeding date was on 10th of June 2021. First factor was adding 0 ,4, 8, 12 and 16 kg
hectares-1 for humic acid when planting and before the first irrigation and after each mowing
process, and the second factor was foliar application with seaweed extract Alga000 at three levels
0, 1, and 2 ml/ litre (2 and 4 ml per litre of total spray).The application were at two stages in every
mowing 20 and 30 days after planting and 10 and 25 days after mowing were at the height of 20
cm above the soil surface. The results showed that adding 16 kg hectares-1 of potassium humate
and spraying with a concentration of 2 ml/litres of seaweed extract had the significant on most of
studies traits. The highest fresh shoot weight was 3.638 kg m-2 and the highest leaves and stems
wet weight of was 0.827 and 2.82 kg m-2 at the second mowing, and the highest shoot dry weight
was at the third mowing 0.652 kg m-2 and the leaves dry weight at the first mowing was 0.203 kg
m-2, while the highest stems dry weight at the second mowing was 0.474 kg m-2, and the highest
dry leaves percentage of the shoot dry weight was 32% at the first mowing and 27.22% at the third
mowing, and in most of them it was a non-significant difference compared to the level of addition
12 kg / hectares of potassium humate and at the same spray concentration of algae extract Navy.