Large amounts of shallow underground water typically with salt content at around 4.7 dS m⁻¹ are available in the North Chain Plain (NCP), which requires managing and thus can be properly used in irrigated agriculture to relieve the increasing pressure on fresh water in this region for supplementary irrigation. Field experiments were conducted to investigate the soil salt accumulation, responses, and yield simulation of winter wheat to the alternate irrigation strategies during 2017–2019. Five irrigation strategies included rain-fed cultivation (NI), fresh and saline water irrigation (FS), fresh water irrigation (FF), saline water irrigation (SS), and saline and fresh water irrigation (SF) during the growth stages. Irrigation with saline water increased soil salinity level and could be balanced annually; however, the leaf gas exchange of winter wheat was almost not significantly affected. The salinity caused by saline water irrigation negatively influenced the vegetative growth. The grain yield was increased by 24% and 32% under the FS and SF treatments compared to NI, while a minor reduction by 12% and 5% in yield under these treatments was recorded compared with the FF treatment. The SALTMED model was calibrated and validated to predict yield, and the high value of the R² reflected a good agreement between modeled and observed values, indicating that the SALTMED model was able to simulate grain yield under the alternate irrigation strategies in the regional climate condition. Supplementary irrigation using saline water at the stem elongation stage and fresh water at the flowering stage is a practical solution to achieve comparable yields with low risk of salt accumulation for winter wheat particularly in the NCP.

大量的浅层地下水，其盐含量通常约为4.7 dS m ^-1可在北链平原（NCP）中使用，需要进行管理，因此可以适当地用于灌溉农业中，以缓解该地区补充灌溉所需的淡水压力。进行了田间试验，以调查2017-2019年间冬小麦对替代灌溉策略的土壤盐分累积，响应和产量模拟。五种灌溉策略包括：雨养（NI），淡水和盐水灌溉（FS），淡水灌溉（FF），盐水灌溉（SS）以及生长阶段的盐水和淡水灌溉（SF）。用盐水灌溉可以提高土壤盐分水平，并且可以每年进行平衡。但是，冬小麦的叶片气体交换几乎没有受到显着影响。盐水灌溉引起的盐度对营养生长产生负面影响。与镍相比，FS和SF处理的谷物产量分别提高了24％和32％，而与FF处理相比，这些处理下的谷物产量分别降低了12％和5％。已对SALTMED模型进行校准和验证，以预测产量以及R ²反映了模型值和观测值之间的良好一致性，表明SALTMED模型能够模拟区域气候条件下交替灌溉策略下的谷物产量。在冬小麦特别是在NCP中，在茎伸长期用盐水和花期用淡水补充灌溉是一种可行的解决方案，可实现相当的产量，且盐分累积的风险较低。