Effects of Magnetized Water on Salt Leaching under Drip Irrigation Condition

Objective Soil salinization is one of a major obstacle factors affecting crop yield in arid region. In this study,a field plot experiment was conducted to investigate the effects of magnetized water irrigation on soil water infiltration and soil salt leaching under the drip irrigation condition. The purpose of our research is to find a novel method to reduce soil salt content and prevent soil secondary salinity in water-saving agriculture. MethodUsing in situ soil moisture sampler and collecting soil leachate in 2 m soil layer,a field experiment was set up,and three treatments including Control( CK).,one times magnetized water irrigation( T1).,two times magnetized water irrigation( T2).,soil water leachate,soil solution salt content and soil salt content were determined.ResultTotal salt content,and the content of Cl-and Na+of soil leachate variation trend was found as CK T1 T2. Soil solution salt content in 60-100 cm layer was greatly higher under magnetized water irrigation treatment than that of the CK,suggesting that magnetized water irrigation played a significant role in soil infiltration and soil salt leaching. Moreover,in contrast to one time magnetized water irrigation treatment,an more obvious soil salt leaching effect was found under the treatment of two times magnetized water irrigation. For instance,the amounts of soil water leachate were 80. 27 kg,91. 39 kg and87. 99 kg,respectively,under CK,T1,T2treatment,compared with control( CK).,the amounts of soil water leachate were increased by 13. 9 % with T1 and increased by 9. 6 % with T2treatment. After the last water irrigation,soil Cl-concentration and soil Na+concentration in 0-100 cm soil layer decreased markedly,and the salt decreased degree order was CK T1 T2. ConclusionFrom our study a conclusion could be drawn that magnetized water irrigation had a significant role in soil water infiltration as well as soil salt leaching in drip irrigation condition.