Effects of Infiltration from Different Flow Point Sources on Soil Salt Distribution in Apple Orchard
[Objective]By investigating the salt distribution characteristics of point source infiltration bodies,the changes of soil salinity in ap-ple orchards with the infiltration of drip irrigation point sources were analyzed to screen out the optimal dripper discharge and drip irrigation du-ration that affect the distribution of soil salt in the main apple orchard.[Method]Set five types of dripper discharge for experiment(q1,q2,q3,q4,CK),using profile grid sampling method,monitor the soil salt content of the horizontal and vertical grids under the drip point before drip ir-rigation,at 3,7,10 hours after the start of drip irrigation and at 24 hours after the end of drip irrigation,further study on the effects of drip flow rate and drip irrigation duration on the horizontal and vertical distribution of soil salinity.[Result]The research results indicate that:the hori-zontal distance between each treatment and the emitter is 0-60 cm,soil salt content is the lowest when treated with q2 drip irrigation for 7 hours,is 82.55 g/kg,reduced by 6.33 g/kg compared to the control group(CK).Vertical distance from the emitter 0 to 30 cm,soil salt con-tent is the lowest when treated with q2 drip irrigation for 7 hours,is 83.67 g/kg,reduced by 10.26 g/kg compared to the control group.[Con-clusion]This indicates that the optimal drip flow rate that affects soil salt transport in apple orchards in this experiment is 8 L/h,the most suit-able drip irrigation duration is 7 hours.
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