IMPACT OF PLANTING Atriplex Canescens ON THE FLORISTIC DIVERSITY AND ON THE PHYSICO-CHEMICAL CHARACTERISTICS OF THE SOIL IN A DEGRADED STEPPE RANGELAND.

Autor: Souffi, Ibtissam, Achoubi, Leila Kadik, Allai, Farida, Bounab, Souhila, Benyahia, Mohammed Elsseddik
Zdroj: Fresenius Environmental Bulletin; 2024, Vol. 33 Issue 5, p390-401, 12p
Abstrakt: To combat desertification and lessen its effects on the impacted population, the Algerian government chose fodder plantation strategy by introducing Atriplex canescens, an invasive plant with high fodder value brought from the USA. A. canescens into Algerian pastures can potentially alter the floristic procession of the areas into which it is introduced. The objective of this work is to analyze the effect of planting A. canescens on the biodiversity and soil properties of a steppe pasture. In a planted rangeland, a floristic study is carried out using the linear method. Physico-chemical analyzes of the soil of this rangeland are carried out on a thickness of 0-40 cm. The results showed presence of 58 species, 46 genera and 22 families, with the predominance of Aster-aceae and Poaceae. The specific contribution of the two locale species Macrochloa tenacissima and Artemisia campestris decreases as soon as A. canescens is present in the rangeland. The soils water content is ranged from 0.356 to 1.291. Total nitrogen content in the planted rangeland, was within the normative range of 0.021 to 0.02 g/kg. A lowest value of pH 7.38 is observed in the plantation and the highest value 8.26 is measured in the non-planted rangeland. Electrical conductivity ranged from 0.155 mmhos/cm to 0.428 mmhos/cm. Sodium content varies from a minimum of 1.407g/kg to a maximum of 3.423 g/kg observed in the planted rangeland. Assimilable phosphorus levels are very low, almost traces. The observed potassium values are between 0.465 g/kg and 1.207 g/kg. Overall, A. canescens contributes to soil fertility but in the long term, it can compete with the presence of local plant species, particularly perennial ones. [ABSTRACT FROM AUTHOR]
Databáze: Supplemental Index
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