Abstract

     This study was conducted on Sunflower plants (Helianthus annuus L.) with the aim of studying the effect of adding Urea and Cerialine fertilizers and spraying with major elements NPK 10 % on morphological and physiological characteristics of cultivar (Sakha 53) growing in plastic bags in the greenhouse in the Biology Department, Faculty of Education, Aden during the season 2018/2019-2019/2020.

    The most important results obtained can be summarized as follows:

 -Sunflower plants, cultivar (Sakha 53), responded to the biological and the morphological indicators (plant length, stem diameter and number of leaves) showed significant differences between the studied treatments and Physiological growth indicators of dry matter accumulation (leaf area LA (m²), representation efficiency NAR, and relative velocity of crop growth RGR) significantly were affected by the addition of biological and mineral fertilizers in all the reading of these traits at 30-45,45-60, and 60-75. where the treatment of the combined treatment with Cerialine 75g/kg seeds with mineral fertilizer spraying (NPK10%), was significantly surpassed to the other treatments. It gave the highest averages of the values of these indictors, while all the treatments had significant effect during the growth seasons 2018/2019 and 2019/2020.

 -The effect of adding biological and mineral fertilizer was significant on the characteristics of chemical analysis of leaf components of chlorophyll (A), chlorophyll(B), total chlorophyll, seed content of protein and crude oil. Biological fertilizer Cerialine treatment at a rate of 75g/kg seed as a single treatment or with mineral spraying with major mineral elements at 10% concentration was significantly superior, compared to untreated control and some other treatment, and it gave the highest values for chemical analysis properties of leaves and seeds during the first and second growing seasons.