Effect of irrigation on salt distribution profile at umjawasir farm in the Northern State, Sudan
2009
Al-amin, N.K., University of Sudan Science and Technology, Khartoum (Sudan). College of Forestry and Range Science, Dept. of Botany and Environmental Science
This work was carried out at Umjawasir irrigated farm in the Northern State, Sudan. It aimed to assess the salts distribution pattern within the root zone to predict soil secondary salinity development, which causes a risk for sustainability of production. The irrigation water was analysed and rated by monitoring average root zone salinity and soil structure stability using E. (Ci) and SAR (Ci) Three sites: I (irrigated for eight years), II (irrigated for three years) and III (bare soil, as control), were studied. Soil samples were taken in 2003, every 0.25 m to a depth of 1.25 m, for each site. The soils E.Ce., Na, Mg and Ca content, ESP, SAR, O.C. and N content were determined. Regression analyses were carried out to investigate the possibility of transient salinization. The results showed that the soil salt content was lower at site I than sites II and III at the soil surface (0.25-0.50 m), and at the depth of 0.75 m, sites I and II had higher E.Ce. compared to site III. Sites I and II showed significant (P= 0.05) differences in E.Ce. with depth. The results also indicated that there was washing of salts from the soil surface and accumulation at depths greater than one metre. Therefore, the hazard of development of transient salinity is expected. Further detailed investigations of the leaching factor and soil physical properties need to be done to make recommendation for suitable irrigation and cultivation practices for sustainable crop production
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