Combined effect of technical, meteorological and agronomical factors on solid-set sprinkler irrigation: I. Irrigation performance and soil water recharge in alfalfa and maize

摘要: Abstract In this work, maize ( Zea mays L.) and alfalfa Medicago sativa were irrigated in two adjoining plots with the same sprinkler solid-set system. Irrigation was evaluated between four sprinklers central position within each plot, above canopy pluviometers soil a FDR probe. Maize simultaneously under operational technical conditions during seasons: 2005, irrigation system layout rectangular, 15 m along line among lines (R15 × 15), seasonal applied according to crop evapotranspiration ET c ); 2006, R18 × 15 around 30% lower than . The depth canopies ID C ) water recharge after RW monitored using 3 m × 3 m grid (25 points 2005 30 2006). For maize, assessed both of plants CL BCL ). average values similar crops seasons but uniformity CUC noticeably depended on crop: differences greater spacings (R15 × 15 R18 × 15). , for maize. crops. significantly related throughout season alfalfa. correlation weaker important positions growth stages. At beginning season, correlated positions. However, weakened when grew, especially because redistributed water. results show that height architecture must be considered analysis distribution as factors influencing performance.