JFAS_Vol 09 N 03

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Browsing JFAS_Vol 09 N 03 by Author "Ababsa, N."

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    ABUNDANCE AND SPECIES RICHNESS OF LOMBRIC MACROFAUNA IN A SEMI-ARID FOREST ECOSYSTEM
    (University of Eloued جامعة الوادي, 2017-09-01) Ababsa, N.; Laiche, A.; Djabbar, F.
    The importance of earthworms for soils has evolved over time. Our study was conducted in the forest of Ouled yagoub (North East Algerian). Sampling at three different altitudes resulted in a total of forty-nine individuals (49) and only three species were identified: Octodrilus complanatus, Allolobophora molleri and Aporrectodea rosea. Spread over two ecological categories. The specific richness is higher in the site of 1400 m of altitude. The Simpson index (Is) varies between 0.44 and 0.49 for the three study sites. The Shannon index fluctuates between 0.41 and 0.74. The values of the Hill index vary between 1 and 1.5 in the three Sites.
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    IMPACT OF EARTHWORM ACTIVITY ON THE CHEMICAL FERTILITY OF IRRIGATED SOIL WITH URBAN EFFLUENTS
    (University of Eloued جامعة الوادي, 2017-09-01) Addad, D.; Kribaa, M.; Ababsa, N.; Tamrabet, L.; Hafidi, M.; El Fels, L.; Benmahammed, A.
    The reuse of urban effluents to irrigate the soils of peri-urban grasslands in the vicinity of the town of Setif (northeastern Algeria) is an old and widespread practice. In this context, the present study was conducted to evaluate the effect of the irrigation with urban effluents on the biological and chemical behavior of soils. Effluents analysis showed significant organic and particulate pollution, the latter contributed to earthworm abundance and increased the richness of irrigated soils with nutrients. The analysis of turricules revealed the role of earthworms through the activity of bioturbation in the increase of the rate of organic matter as well as in the bioavailability of the nutrients of the irrigated soils. In space, permanent vegetation cover has played an important role as a biofilter. This was confirmed by the inter-site differences recorded through the measured variables particularly organic ones.