| Autor: |
Carina Rosa Álvarez, Helena Rimski Korsakov, Martín Torres Duggan |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Saline and Alkaline Soils in Latin America ISBN: 9783030525910 |
| DOI: |
10.1007/978-3-030-52592-7_15 |
| Popis: |
Drought events are frequent in the Pampas region of Argentina where most field crops are being managed under rainfed farming conditions and hence supplementary irrigation allows farmers to increase and stabilize yield crops. Supplementary irrigation for grain production supplies between 10 and 30% of the total water received annually by the cropping system. Most irrigation water across the Pampas is characterized by high sodium bicarbonate concentrations. According to a synthetic analysis from representative field experiments carried out across different farming systems, supplementary irrigation increased pH by 9%, electric conductivity by 34% and exchangeable sodium percentage by 177%. There is conflicting information on the impact of increased exchangeable sodium percentage on soil physical characteristics. Some field experiments show higher values of bulk density, mechanical resistance, or lower water infiltration rates in supplementary-irrigated fields, but available data is not sufficient to build a general conceptual model for the whole Pampas region. More research should be conducted to assess the long-term impact and sustainability of supplementary irrigation systems across different farming and irrigation conditions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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