9 – FERTIGATION MANAGEMENT AND CROPS RESPONSE TO SOLUTION RECYCLING IN SEMI-CLOSED GREENHOUSES

摘要: Economical and environmental constraints limit the daily quantity of water fertilizer that can be added via open irrigation systems frequency. Consequently, salt nutrient concentrations at root surface increase decrease, respectively, between successive irrigations thus reducing nutrients’ uptake efficiency rendering leaching from zone less effective. In well-planned closed-loop systems, frequency constrains are practically non-existent, temporary stresses stemming reduced potentials do not crop development yield. It is expected therefore transition open- to would result only in safer environment diminishing input costs but also enhanced yield produce quality. This chapter describes principles related greenhouse solution recycling. evaluates horticultural consequences emission greenhouses impact salinity build-up ample high fertigation on quality important crops. Finally, it assesses efforts simulate accumulation response recirculation under different conditions.