PJB-2022-496
Ecological dynamics and diagnosis of dieback of Pistacia atlantica Desf. – Anacardiaceae in the Messaâd region (Djelfa, Algeria) using the Archi method
Hadjadj Kouider, Guerine Lakhdar, Belhadj Safia, Walid Soufan and Hail Z. Rihan
Abstract
This research aims to study the morphological and the resilience capacity of the Atlas pistachio tree (Pistacia atlantica Desf.) in the region of Messaâd (Djelfa province), Algeria. A total of 512 trees were measured (total height, bole height, diameter) in Oum El Khechab (303 trees) and El Khoua (209 trees) groves. A horizontal projection of the crowns was carried out by measuring 4 radii, in equal directions and angles, the first radius of which was fixed randomly. The study of dieback and resilience of P. atlantica was carried out using the ARCHI diagnostic method. The method made it possible to determine the ARCHI types in each grove: healthy trees (Ht), resilient trees (Rt), descending crown tree (Dct), stressed trees (St), trees in irreversible decline (Di), and dead trees (Dt). The results reflect the presence of a regular structure stand dominated by two diameter classes (big wood, very big wood) in Oum El Khechab and an irregular structure stand dominated by three classes (Perch, small wood, very big wood) in El Khoua. For the vertical structure, we noted the dominance of trees with heights between 5 and 10 m in Oum El Khechab, and trees less than 3 m high in El Khoua. The diameter of the crown, its projected area, its proportion and its degree of bulging were determined by the diameter class in each grove. The application of the ARCHI method on the Atlas pistachio tree in Messaâd revealed the dominance of the ARCHI type healthy tree (Ht) with 60.07 %, resilient tree (Rt) with 21.12 % and stressed tree (St) with 16.50 % in Oum El Khechab grove. Concerning El Khoua grove, was observed the dominance of healthy trees (Ht) with 35.89 %, resilient trees (Rt) with 23.44 % and trees in irreversible decline (Di) with 16.27 %.
To Cite this article:
Kouider, H., G. Lakhdar, B. Safia, W. Soufan and H.Z. Rihan. 2024. Ecological dynamics and diagnosis of dieback of Pistacia atlantica Desf. – Anacardiaceae in the Messaâd region (Djelfa, Algeria) using the Archi method. Pak. J. Bot., 56(2): DOI: http://dx.doi.org/10.30848/PJB2024-2(20)
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