Examinando por Materia "Drip irrigation"

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A method of monitoring of the bulb of quinoa plantations orientated to the dosing of the water volume for drip irrigation systems
(Institute of Electrical and Electronics Engineers, 2018-10-03) Phellan, Eduardo; Gutiérrez, Justiniano; Soto Jeri, Jonell; Capuñay, Simon; López, Jorge; Del Carpio, Christian
The present work proposes a method of electronic monitoring of physical variables of the plant's wet bulb, in order to properly dose the water volume required for drip irrigation systems. The method has the ability to be conditioned to the need of the plant, in order to maintain an optimum level of humidity in the crop field, as it would be achieved in a laboratory. The monitoring is carried out on the percentage of humidity and the electrical conductivity of the soil. For this, sensors are used that are properly calibrated in the operating ranges of 10 to 30% for humidity and 1.2 to 1.7 ds/m for electrical conductivity. The electronic equipment developed for the implementation of the method uses 3 humidity sensors placed at different depths and 1 electrical conductivity sensor for monitoring salinity. Based on the information sent by these sensors in real time, the activation times of the solenoid valve that makes up the drip irrigation system are adjusted.
Unraveling ecophysiological mechanisms in potatoes under different irrigation methods: a preliminary field evaluation
(MDPI, 2020-06-11) Silva Díaz, Cecilia; Ramírez, David A.; Rodríguez Delfín, Alfredo; De Mendiburu, Felipe; Rinza, Javier; Ninanya, Johan; Loayza, Hildo; Quiroz, Roberto
Potatoes—a global food security and staple crop—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 (g𝑠_𝑚𝑎𝑥) irrigation thresholds (T2: 0.15 and T3: 0.05 mol H2O m−2 s−1) compared with a fully irrigated control (g𝑠_𝑚𝑎𝑥 > 0.3 mol H2O m−2 s−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.