Study of Hydro-Saline Characteristics of Soils a Palm Grove in Basin of Ouargla (Northern Algerian Sahara)

  • Rezagui Djihed
  • Daddi M. Bouhoun
  • D. Boutoutaou
  • A. Djaghoubi

Abstract

Saharan soils are often faced with several problems of development, taking account the hydro-edaphic constraints, mainly of hydric types by water table, mechanical by gypso-calcareous crusts and saline by irrigation waters and upwelling of water table. Our work consists in doing a soil characterization of a palm grove in Ouargla in order to study the constraints hydro-halomorphes. The results show that irrigation water by two plies of Senonian and Mioplcène had a high salinity with a value of 2.83 and 5.10 dS.m-1 respectively. The conduct of irrigation is traditional random of submersion type. The palm grove has a poor drainage with a level of water table 156.67±15.71 cm and salinity of 31.37±34.04 dS.m-1. The drains are open type and their maintenance is not regular. This situation of management of irrigation-drainage promotes the upwelling of water table and the waterlogging in soils. The study of soil profiles shows the existence of mechanical obstruction of gypso- calcareous crusts which limit the entrenchment of the date palms and the leaching of salts. Soil salinity is excessive in profiles with a range of 8.98 ± 4.58 dS.m-1. This accumulation of salts is due to the dynamic ascending and descending of salts respectively under the effect of upwelling of water table and leaching by irrigation. The salinization, the upwelling of water table and the presence of gypso- calcareous crusts recorded in Ouargla testify to a degradation hydro-halomorphe and mechanic of soil which constitute the major constraints in the management of system irrigation-drainage and sustainable agricultural development of the palm groves of the basin of Ouargla. Some hydro-agricultural planning are necessary to apply in the oasis to improve the hydro-mechanical properties of soils in order to reduce their degradation

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Study of Hydro-Saline Characteristics of Soils a Palm Grove in Basin of Ouargla (Northern Algerian Sahara)
Published
2017-02-28
How to Cite
DJIHED, Rezagui et al. Study of Hydro-Saline Characteristics of Soils a Palm Grove in Basin of Ouargla (Northern Algerian Sahara). Journal of Agricultural Science Research, [S.l.], v. 1, n. 1, p. 1-10, feb. 2017. Available at: <http://www.archyworld.com/journals/index.php/jasr/article/view/33>. Date accessed: 21 aug. 2017. doi: https://doi.org/10.22496/jasr2016092787.
Section
Articles