AGROBIOLOGIA
Volume 12, Numéro 2, Pages 3034-3051
2022-12-31
Influence Of Mechanical Coppicing On The Biometry And Biomass Of Pastoral Plantations Of Atriplex Canescens: A Case Study Of Restored Rangelands In The Djelfa Region, Algeria.
Authors : Azzouz Mohamed .
Abstract
Topic description: The aging of Atriplex canescens plantations requires development, to better satisfy the food needs of the sheep herd on steppe rangelands. Objectives: The aim of the study was to replace animal grazing with mechanical pruning to improve biomass production and to show to what extent cutting levels influence the behavior and regeneration dynamics of plants. Methods: Three experimental stations (S1, S2, and S3) they are located respectively on a sandy substratum (dune) with a very low biomass, a salty soil and a soil of an old forest. In plots of one hectare with a density of 1000 plants/hectare, mechanical cuts were carried out on shrubs at different heights (H10, H30 and H50 cm) during a follow-up period of 05 years (before pruning A0 and after pruning A1, A2, A3 and A4). Results: The results obtained reflect the influence of the factors studied (substrate, age, and cutting level) on the biometric parameters (height and girth) of the clumps. For S1, whose age exceeds 25 years, the plants have already been transformed for the most part into wood with very low fresh material rates. The substrate and age were unfavorable to the development of the plant; the three levels of cutting had only a derisory effect, especially for H50.On the other hand for the two other stations S2 and S3 younger. The influence of cutting levels shows better results for H10 and H30, where there is a significant presence of grassland. Conclusion: In view of the results obtained, it would be desirable to opt for a judicious generalization of mechanical pruning in A. canescens plantations with cuts at H10 and H30 from the ground level to increase the biomass yield and the longevity of the plantations.
Keywords
A.canescens ; Pastoral management ; Biomass ; Biometry ; Djelfa ; Steppe rangelands ; Plantation ; Re-cutting ; Over explantation ; Aménagement pastoral ; Biomasse ; Biométrie ; Parcours steppiques ; Recépage ; Surexploitation
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