Effects of deficit irrigation strategies on soil salinization and sodification in a semiarid drip-irrigated peach orchard
| العنوان: | Effects of deficit irrigation strategies on soil salinization and sodification in a semiarid drip-irrigated peach orchard |
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| المؤلفون: | Antonio Martínez-Cob, E. T. Medina, J.M. Faci, R. Aragüés |
| المصدر: | BASE-Bielefeld Academic Search Engine Digital.CSIC. Repositorio Institucional del CSIC instname |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Irrigation, Salinity, Soil salinity, Soil test, suelos y riegos, Escasez de agua, Deficit irrigation, Soil Science, Drip irrigation, Leaching fraction, Sodicity, Leaching (agriculture), Water deficit, Earth-Surface Processes, Water Science and Technology, Leaching model, Riego por goteo, Suelo árido, Agronomy, Salinidad del suelo, Environmental science, Salinidad, Agronomy and Crop Science, Leaf ions |
| الوصف: | 28 Pags., 4 Tabls., 6 Figs. The definitive version is available at: http://www.sciencedirect.com/science/journal/03783774 Deficit irrigation strategies save water, but may enhance soil salinization and sodification when irrigated with low-quality waters. The objectives of this five-year study performed in the middle Ebro Basin (Spain) were to quantify these processes and assess their potential deleterious impact on the response of peach trees subjected to full irrigation (FULL), sustained deficit irrigation (SDI, irrigated at 62.5% of FULL) and regulated deficit irrigation (RDI, irrigated at 50% of FULL in Stage II of fruit development). In relation to FULL, water savings were 40% in SDI and 9% in RDI. Soil salinity (ECe), chloride concentration (Cle) and sodicity (SARe) measured in the saturation extract of 480 soil samples generally increased in the irrigation seasons, particularly in the more severe deficit irrigation strategy (SDI). These increases were counteracted by the leaching of salts induced by high leaching fractions (LF) and low water deficits (WD) attained during the non irrigation seasons. The changes in ECe, Cle and SARe measured between sampling dates were significantly correlated (p < 0.01) with WD and LF calculated for the periods between sampling dates. These parameters were therefore suitable to estimate the required irrigation depths for soil salinity and sodicity control. Peach trees were unaffected by the irrigation treatments, but yield productivity tended to decline above a threshold ECe of 4 dS m−1. Under the irrigation salinity (mean EC = 1.1 dS m−1) and the semiarid climatic characteristics of the study area, the three examined irrigation strategies proved to be sustainable in the five studied years. This work was financed by the CSD2006-00067 project (CONSOLIDER-INGENIO 2010). |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0378-3774 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::202460f5efca5b76b9f0ed499a422069 http://hdl.handle.net/10532/2593 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....202460f5efca5b76b9f0ed499a422069 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 03783774 |
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