Analysis of soil wetting and solute transport in subsurface trickle irrigation

摘要: The increased use of trickle or drip irrigation is seen as one way helping to improve the sustainability systems around world. However, soil water and solute transport properties profile characteristics are often not adequately incorporated in design management systems. In this paper, we describe results a simulation study designed highlight impacts on from buried emitters. analysis addresses influence hydraulic properties, layering, discharge rate, frequency, timing nutrient application wetting patterns distribution. We show that (1) can plant availability medium low permeability fine-textured soils, providing adapted account for their (2) highly permeable coarse-textured nutrients move quickly downwards emitter, making it difficult wet near surface zone if emitters too deep, (3) changing fertigation strategy soils apply at beginning an cycle maintain larger amounts above thereby them less susceptible leaching losses. demonstrate need differences when designing strategies. Failure do will result inefficient lost opportunities reducing negative environmental irrigation.