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Sirvi Autor "Amirouche, M." järgi

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  • Pisipilt
    Kirje
    Influence of nitrogen fertilization on lettuce yields (Lactuca sativa L.) using the15N isotope label
    (2019) Amirouche, M.; Zella, L.; Smadhi, D.
    Nitrogen fertilization plays an important role in the growth of market gardening and the improvement of yields. Its efficiency of use is imperative for the preservation of the agricultural environment. An experiment is carried out over three consecutive years (2014/2015), (2015/2016) and (2016/2017), in a sub humid climate. The methodology adopted focuses on the variation of optimal nitrogen doses and their effects on the evolution of lettuce cultivation (Lactuca sativa L.), which has a socio-economic impact. The approach takes into account the isotopic marking technique, 15N. The experimental device adopted is of the complete random block type, with four (04) levels: 0 (control), 60, 120 and 180 kg N ha-1 with four (04) repetitions. These levels are used to diagnose the effect of different doses on biomass (dry matter) and yield. It has been shown those doses between 0 and 120 kg N ha-1 increase significantly (p < 0.05), yields and dry matter with values of 18.32, 45.49 to 57.93 t ha-1 and 4.32, 5.52 to 9.77 t ha-1 , respectively. The rate of 120 kg N ha-1 , is shown statistically, as the efficient rate to cover the nitrogen needs of lettuce. This efficiency reaches 74.48%. Beyond that, nitrogen is not valorized by the crop. These results contribute to the realization of a technical reference system for lettuce cultivation, for an efficient use of nitrogen.
  • Pisipilt
    Kirje
    Spatio-temporal analysis of water productivity of potato (Solanum tuberosum L.) under different bioclimatic stages
    (Estonian University of Life Sciences, 2025) Amirouche, M.; Smadhi, D.; Degui, N.
    Water scarcity is a major problem in Algeria. This shortage is set to worsen in the coming years as a result of both climate change and the growth in socio-economic activities, leading to an increasing demand for water. Market gardening, in particular potato cultivation - the second most important crop after cereals - is booming throughout the country, year-round. The aim of this study is to assess the water productivity of strategic potato crops in the regions of Algiers, Tiaret and El Oued, which have temperate, semi-arid and desert climates, respectively. The approach is based on calculating the water requirements of the potato crop (Solanum tuberosum L.), using the CropWat model (V 8.0) and the yields recorded by the Ministry of Agriculture and Sustainable Development, over a 23-year study period (2000–2022). The results obtained showed that the values of irrigation water requirements for potato cultivation in the three regions studied are 542.3 mm, 452.7 mm and 712.5 mm, respectively. On the other hand, the water productivity figures are around 6.1, 5.8 and 4.2 kg m-3. This analysis could be further used by irrigation system managers and potato growers, to help them use water resources efficiently.