@article{fdi:010072325, title = {{E}valuation and analysis of deep of drip irrigated citrus crops and saline conditions in a semi-arid {W}ater {S}tatus percolation losses er non-saline and area}, author = {{N}assah, {H}. and {E}r-{R}aki, {S}. and {K}habba, {S}. and {F}akir, {Y}. and {R}aibi, {F}. and {M}erlin, {O}livier and {M}ougenot, {B}ernard}, editor = {}, language = {{ENG}}, abstract = {{I}n arid and semi-arid regions, irrigation management is important to avoid water loss by soil evaporation and deep percolation ({DP}). {I}n this context, estimating the irrigation water demand has been investigated by many studies in the {H}aouz plain. {H}owever, {DP} losses beneath irrigated areas in the plain have not been quantified. {T}o fill the gap, this study evaluated {DP} over two drip-irrigated citrus orchards ({A}gafay and {S}aada) using both water balance and direct fluxmeter measurement methods, and explored the simple {FAO}-56 approach to optimise irrigation in order to both avoid crop water stress and reduce {DP} losses in case of non-saline and saline soils. {T}he experimental measurements determined different terms of the water balance by using an {E}ddy-{C}ovariance system, fluxmeter, soil moisture sensors and a meteorological station. {U}sing the water balance equation and fluxmeter measurements, results showed that about 37% and 45% of supplied water was lost by {DP} in {S}aada and {A}gafay sites, respectively. {T}he main cause of {DP} losses was the mismatch between irrigation and the real crop water requirement. {F}or {A}gafay site, it was found that increased over-irrigation had the effect of reducing soil salinity by leaching salts. {T}he applied {FAO}-56 model suggested an optimal irrigation scheduling by taking into account both rainfall and soil salinity. {T}he recommended irrigations could save about 39% of supplied water in non-saline soil at {S}aada and from 30% to 47% in saline soil at {A}gafay.}, keywords = {{S}aline soil ; {W}ater balance ; {F}luxmeter ; {FAO}-56 approach ; {I}rrigation scheduling ; {MAROC} ; {ZONE} {SEMIARIDE}}, booktitle = {{S}ensing and control of crop water status}, journal = {{B}iosystems {E}ngineering}, volume = {165}, numero = {{N}o {S}p{\'e}cial}, pages = {10--24}, ISSN = {1537-5110}, year = {2018}, DOI = {10.1016/j.biosystemseng.2017.10.017}, URL = {https://www.documentation.ird.fr/hor/fdi:010072325}, }