• Masoud.J.Al–marri

• Osman A. Elsharief Abdalla

• Mohammed Al-Masri

• Mohammed I. Abubaker

• M. Mohamed

• R. Hichem

Abstract

Net greenhouse tomatoes were produced under surface conventional drip irrigation and newly introduced subsurface buried diffusers irrigation methods in Qatar during 2016/2017 season to evaluate the effects of the two methods as to salt build up/accumulation in the root zone. Irrigation water was supplied at three levels 100, 75 and 50% of crop water consumption. Measurement values of soil salinity collected one month after planting and at the end of the experiment for 0-7.5 cm, 7.5-15cm and 15-30 cm soil depths were evaluated. No significant effects were obtained but observations had indicated favorable lesser soil salinity conditions under buried diffuser at the early stage of plant growth and the association of this irrigation method with consistently lower ECe values throughout the duration of the experiment. The two methods seemed to be comparable as to their effect as water-saving technologies. Under 100% level of irrigation, the buried diffuser irrigation method was significantly more effective in reducing soil salinity. Soil salinity became 27.74 % lesser than 100% irrigation level, whereas at 75% and 50% levels of irrigation this method of irrigation did not significantly reduce soil salinity. Drip irrigation method, on the contrary to the buried irrigation method reduced but insignificantly soil salinity at 75 & 50% levels of irrigation by 37.68 and 47.76%, respectively.

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