Evaluation Nitrogen Fixation Efficiency in some Peas (Pisum sativum L.) Genotypes under Homs Governorate Conditions

Alaa Khallouf*1, Abd ElMuhsen Meri2, Samiha Mahmoud3, Amira Khazal3, Dima Al-Sied3

  • Administration of Natural Resources Research- General Commission for scientific Agricultural Research (GCSAR). Damascus, Syria.
  • Administration of horticulture Research- General Commission for scientific Agricultural Research (GCSAR), Damascus, Syria..
  • Homs Research Center- General Commission for scientific Agricultural Research (GCSAR), Homs, Syria.

(* corresponding author:  A. Khallouf E-mail:  alaakhallouf@gmail.com)

Received: 15/08/2020        Accepted: 14/9 /2020

Abstract

The research was carried out in plots at Natural Resources Research Department- Homs Research Center- General commission for Agricultural Scientific Research, during the 2017/2018 season. It aimed to study some phenological and morphological characteristics and the nitrogen fixation efficiency of some pea genotypes under Homs Governorate conditions. 20 genotypes were used in addition to two local introduced varieties as control C1 and C2. The amount of nitrogen fixation was determined using the N-difference method. The study demonstrated that A14 and A12 genotypes were the earliest to complete germination (16.8-17.5 days) respectively, while the genotypes A15 and A17 were the earliest to reach maximum flowering (63.3- 63.9 days) respectively. The experiment also showed that the genotype A14 had the most effective bacterial nodes number with (24.3 nodes/ plant) with significantly differences from the genotype A5. As for the efficiency of genotypes in nitrogen fixation, the study showed that the genotype A5 was the most efficient in fixing atmospheric nitrogen at a rate of (81.68 Kg N/ha), followed by A14 genotype (71.46 Kg N/ha) and the rest of the genotypes. Therefore, both genotypes A5 and A14 may be included in genetic improvement programs to obtain high-efficiency of atmospheric nitrogen fixation and thus reduce the use of chemical fertilizers.

Keywords: Phenological and morphological traits, Atmospheric nitrogen fixation, Effective bacterial nodes, Pea.

Full paper in Arabic: PDF