Abdulghani Alkhaldi(1)* and Monier Alnabhan(2)
(1). Cotton Research Administration, Aleppo, Syria.
(2). Center Hama for Agriculture scientific Research, GCSAR, Syria.
(*Corresponding author: Dr. Abdulghani Alkhaldi. E-Mail abdulgh64@gmail.com)
Received: 19/10/2022 Accepted:1/05/2022
Abstract:
Cotton crop is (Gossypium hirsutum L.) one of the most important strategic crops in Syria, because of its multiple uses, and the large size of the population is working in it directly or indirectly. The aim is evaluation of cotton variety Aleppo 124 (Which was approved in the year 2017) with Aleppo 33/1 variety under different fertilizer levels (F1 = +15% N from the fertilizer recommendation, F2 = the fertilizer recommendation, and F3 = -15% kg N/ha from the fertilizer recommendation) and two irrigation levels (I1 = 100% of the field capacity and I2 = 85% of the field capacity). Field experiment was carried out at Hama center for agriculture scientific research – General commission for agriculture scientific research 2018, heavy clay soil, three replications .It was designed according to split-split design. The results wear analyzed by Genstat 12 program. Results of variance analysis (ANOVA) at significant level 5%, There are significant differences in nitrogen fertilization treatments, Cotton productivity increased 16% in the first treatment compared with the second treatment, and the productivity decreased 8% for the third treatment when compared to the second treatment. There were also no significant differences in productivity between the two irrigation treatments, the crop Productivity increased about 6.7%, for full irrigation (a virtual increase). The walnuts opening rate on 13 September for the Aleppo 124 variety was twice as much as that for Aleppo 33/1. The first fertilization treatment chlorophyll exceeded the second treatment by about 16% and the third treatment by about 37%, and the second fertilization treatment over the third 18% .
Key words: Gossypium hirsutum L., Cotton, nitrogen fertilization, Aleppo 33/1 variety, Aleppo 124 variety, chlorophyll, water requirements.
Full paper in Arabic: pdf