Unraveling Ecophysiological Mechanisms in Potatoes under Different Irrigation Methods: A Preliminary Field Evaluation
| Autor: | David A. Ramírez, Cecilia Silva-Díaz, Roberto Quiroz, A. Rodríguez-Delfín, Johan Ninanya, Felipe De Mendiburu, Hildo Loayza, Javier Rinza |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Irrigation Drought stress Stomatal conductance drip irrigation Chemistry physiological recovery Water stress potato yield lcsh:S rewatering 04 agricultural and veterinary sciences Drip irrigation Photosynthesis 01 natural sciences lcsh:Agriculture Horticulture water stress furrow irrigation 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science Surface irrigation 010606 plant biology & botany |
| Zdroj: | Agronomy, Vol 10, Iss 827, p 827 (2020) Agronomy Volume 10 Issue 6 |
| ISSN: | 2073-4395 |
| Popis: | Potatoes&mdash a global food security and staple crop&mdash is threatened by dry spells in drought-prone areas. The use of physiological thresholds to save water while maintaining a reasonable tuber yield has been proposed, but their effects on physiological performances and usefulness under different irrigation methods are yet to be evaluated. In this study, photosynthetic traits were monitored to assess the effect of water restriction and rewatering under drip (DI) and furrow (FI) irrigations. The treatments consisted of two maximum light-saturated stomatal conductance (g s _ m a x ) irrigation thresholds (T2: 0.15 and T3: 0.05 mol H 2O m &minus 2 s &minus 1 ) compared with a fully irrigated control (g s _ m a x > 0.3 mol H 2O m &minus 1 ). DI used less water than FI but promoted early senescence and low percentage of maximum assimilation rate (PMA) at late developmental stages. FI caused no yield penalization in T2 and higher recovery of carbon isotope discrimination and PMA than DI. It is suggested that moderate water quantities of early and frequently water pulses in the irrigation, promote short-term water stress memory improvement, senescence delay and more capability of recovery at late stages. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|