Category: Water management
The roles of fruit sink in the regulation of gas exchange and water uptake: A case study for avocado
The effects of drip irrigation frequency on ‘Hass’ avocado trees grown in lysimeters were examined. The experimental design comprised three irrigation frequencies: (a) pulsed irrigation (10–20 min every 30 min) throughout the day (Irg1); (b) one daily irrigation event beginning at night and terminated in the morning every day (Irg2); and (c) one irrigation event every two days (Irg3). Irrigation treatments induced significant differences in water availability in the root zone and in plant water
Response of ‘Hass’ avocado trees to irrigation management and root constraint
The performance of ‘Hass’ avocado trees grown in lysimeters under different irrigation regimes obtained by manipulating drip irrigation frequency and root volume was examined. The experimental design comprised six treatments (3×2) with three irrigation frequencies and two container volumes (100- and 200-L). The three irrigation frequencies were: pulsed irrigation (10–20min every 30min) throughout the day (Irg1), one daily irrigation event beginning at night and terminated in the morning every
Irrigation of ‘Hass’ avocado: effects of constant vs. temporary water stress
The main objectives of the present study were to assess the water demand for heavy fruit load of ‘Hass’ avocado throughout the growth periods and to investigate the effects of deficit irrigation during sensitive phenological phases on yield. The experimental set-up allowed the comparison between trees responses to three irrigation strategies during the entire growth period (no water stress; excessive irrigation; constant water stress) as well as the comparison between regulated deficit irrigation
Avocado Production: Water Footprint and Socio-economic Implications
The market for avocados is among the fastest expanding markets worldwide, and consumption, particularly in North America and Europe, has increased during recent decades due largely to a combination of socio-economic and marketing factors. Avocado production, however, is associated with significant water conflicts, stresses and hot spots, as well as with other negative environmental and socio-economic impacts on local communities in the main production zones. In considering near-future climatic change
Economic analysis of irrigation and fertilization management of avocados
The effect of integrated applications of various irrigation and fertilization rates on productivity (yield and size) and returns of the 'Hass' avocado (Persea americana Mill.) have been analyzed from 1987 to 1991 in western Riverside County. Eighteen treatment combinations comprised of three irrigation levels [80%, 100%, and 120% crop water use (ETc)], three N fertilizer levels (0.16, 0.7, and 1.4 kg/tree per year), and Zn (0 and 0.2 kg/tree per year) were included in the analysis, Using a partial
Soil oxygen and water dynamics underlying hypoxic conditions in the root-zone of avocado irrigated with treated wastewater in clay soil
Alternative water sources for agriculture are in high demand in a world with diminishing fresh water (FW) availability. Treated wastewater (TWW) offers a reliable alternative, but increasing evidence is pointing to damage to TWW irrigated orchards planted in clay soils related to soil hypoxia. The mechanisms responsible for this hypoxia have not been extensively studied to date. The aim of this study was to elucidate meaningful insights into the mechanisms responsible for the hypoxia in TWW irrigated