Response of drip-irrigated chufa (Cyperus esculentus L. var. sativus Boeck.) to different planting configurations: Yield and irrigation water-use efficiency

Abstract

A two-year study was conducted to analyse the yield and irrigation water-use efficiency of chufa crop in response to planting configuration and drip irrigation scheduling as a function of the volumetric soil water content. The planting configurations were: beds with three plant rows and three driplines (B3), beds with three plant rows and two driplines (B2), beds with two plant rows and two driplines (b), and ridges (R). The yield *Revised Manuscript with No changes Marked Click here to view linked References 3), which in turn was higher than B3 (5.92 kg m-3) and b (5.69 kg m-3). These values of the irrigation water-use efficiency were considerably higher than those obtained in previous experiments (based on the volumetric soil water content in the ridges). Neither the yield nor the average tuber weight were affected by the position of the different planting rows in the bed.

Regulated Deficit Irrigation as a Water-Saving Strategy for Onion Cultivation in Mediterranean Conditions

“…where ET c (mm) is the crop evapotranspiration; Pe is the effective precipitation (mm), determined from rainfall data using the method of the U.S. Bureau of Reclamation [40], as presented by Pascual-Seva et al [41]; and Ef is the irrigation efficiency, being 0.95 (considering that the uniform distribution = 0.98; deep percolation ratio = 0.97; the leaching requirement is negligible, as has been stated for onion cultivars grown in the Experimental Centre). The ETc (mm) was calculated from the ET o , and a single crop coefficient (K c ) was proposed for local conditions by the IVIA [42], adapting the duration of each stage to the growing cycle ( Table 1).…”

Deficit Irrigation as a Sustainable Practice in Improving Irrigation Water Use Efficiency in Cauliflower under Mediterranean Conditions

“…where ET c (mm) is the crop evapotranspiration, Pe is the effective precipitation (mm) determined from rainfall data using the method of the U.S. Bureau of Reclamation [32], as presented by Pascual-Seva et al [33], and Ef is the irrigation efficiency of 0.95 (considering distribution uniformity = 0.99 and deep percolation ratio = 0.04 which is comparable to leaching requirement, as it has been stated for cauliflower cultivars grown in the Experimental Centre [30]).…”

Effect of Deficit Irrigation on the Productive Response of Drip-irrigated Onion (<i>Allium cepa</i> L.) in Mediterranean Conditions

“…where ETc is the crop evapotranspiration (mm), Pe is the effective precipitation (mm) determined from rainfall data using the method of the U.S. Bureau of Reclamation (Stamm, 1967) as presented by Pascual-Seva et al (2016), and Ef is the irrigation efficiency (including percolation and uniformity), which was considered to be 0.95 (as stated for onion cultivars grown in the Experimental Centre Allen et al (1998) as follows:…”

“…Increasing water scarcity and irrigation costs have heightened interest in improving the productivity of water use in agriculture (Bessembinder et al, 2005;Fereres and Soriano, 2007) by using efficient irrigation management approaches and appropriate strategies that increase water productivity (Molden et al, 2010;Malek and Verburg, 2017). Irrigation water use efficiency (IWUE) and water use efficiency (WUE) are common indicators used to assess the efficiency of irrigation water use in crop production (Tolk and Howell, 2003;Pascual-Seva et al, 2016). Currently, the main aim is to increase crop production by maximizing IWUE and increasing crop production per unit of water applied.…”