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袁成福.石羊河流域咸水灌溉下土壤水盐动态及春玉米产量模拟水资源与水工程学报[J].,2019,30(2):239-244
石羊河流域咸水灌溉下土壤水盐动态及春玉米产量模拟
Simulation of soil water-salt dynamic and spring maize yield under saline water irrigation in Shiyang River Basin
  
DOI:10.11705/j.issn.1672-643X.2019.02.37
中文关键词:  咸水灌溉  SWAP模型  土壤盐分动态  春玉米  产量  石羊河流域
英文关键词:saline water irrigation  SWAP model  soil salt dynamic  spring maize  yield  Shiyang River Basin
基金项目:江西省水工程安全与资源高效利用工程研究中心开放基金项目(OF201606); 江西省教育厅科学技术研究项目(GJJ161471、GJJ161472)
作者单位
袁成福1,2 (1.江西省水工程安全与资源高效利用工程研究中心, 江西 南昌 330099
2.江西水利职业学院, 江西 南昌 330013) 
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中文摘要:
      为了探究石羊河流域地下咸水资源的利用方式,利用春玉米咸水灌溉田间试验观测资料对SWAP(Soil-Water-Atmosphere-Plant)模型参数进行了率定和检验,并利用率定参数后的SWAP模型模拟了较长时期咸水灌溉对土壤盐分动态及春玉米产量的影响。研究结果表明:土壤含水量、土壤含盐量和春玉米产量的实测值与模拟值吻合较好,均方误差(RMSE)和平均相对误差(MRE)均在允许的误差范围之内,经过率定和检验后的SWAP模型可以用于研究区春玉米咸水灌溉的模拟;较长时期咸水灌溉模拟结果表明,在模拟期内,矿化度在3.0 mg/cm3以下的微咸水灌溉土壤盐分累积量在2.8 mg/cm3以下,春玉米减产幅度在20%以内,矿化度在6.0 mg/cm3以上的咸水灌溉土壤盐分累积量在4.0 mg/cm3以上,春玉米减产幅度在38%以上。在研究区可以较长时期利用灌水矿化度低于3.0 mg/cm3的微咸水进行灌溉,土壤积盐量较少,对春玉米产量影响较小,可以达到合理利用地下咸水资源的目的。
英文摘要:
      In order to explore the utilization of underground saline water resource in Shiyang River Basin, the soil-water-atmosphere-plant (SWAP) model was calibrated and validated based on field experiments data of saline water irrigation in spring maize field and was used to simulate the long time effect on soil salt dynamic and spring maize yield of saline water irrigation. The results showed that simulated soil water content, soil salinity and spring maize yield agreed well with the measured values. The root mean square error (RMSE) and mean relative error (MRE) were within the allowable error ranges. The SWAP model could be used to simulate saline water irrigation of spring maize after calibration and validation. The long time simulation results indicated that soil salt accumulation was below 2.8 mg/cm3 and spring maize yield was reduced by below 20% under brackish water irrigation of 3.0 mg/cm3 during the simulation period. The soil salt accumulation was above 4.0 mg/cm3 and spring maize yield was reduced by above 38% under brackish water irrigation of 6.0 mg/cm3 during the simulation period. Brackish water irrigation of 3.0 mg/cm3 can be used for irrigation for a relative long duration in the research area, as it has little soil salt accumulation and will not cause significant reduction in spring maize yield. This study has an important significance for saline water irrigation and also guides agricultural production practice.
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