ASABE Technical Library - Abstract

Abstract. Greenhouse saline soil was induced by excessive nitrogen fertilizer and closed environment. A soil culture experiment was conducted to study the effects of organic fertilizer on evaporation in greenhouse saline soil and coastal saline soil. Two organic fertilizer rates (Rice bran, fish bone; 0, 75g kg^-1) were applied at high humidity and low humidity in the two saline soils (soil salinity, 6‰) with constant temperature. Organic fertilizer can effectively reduced saline soil evaporation for all treatments. During an irrigation cycle, greenhouse soil decreased 15% and coastal saline soil decreased 8% at high humidity, respectively; evaporation of both soil reduced about 20% at low humidity. Evaporation of greenhouse saline soil reached the peak at the later stage in low humidity, and evaporation of coastal saline soil has a maximum at the initial stage. Both saline soils reached the highest evaporation at the initial stage in low humidity. The soil evaporation (y) curves over time (x) in all treatments can be described by nonlinear equations: y=a*(x³)+b*(x²)+c*x+d.