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松嫩平原中、西部地区土壤盐渍化非常严重,盐渍土改良对于土地资源利用和生态环境改善具有重大意义。在大安古河道苏打草甸盐化土、碱化盐土和草甸碱土复区选择试验田,通过种植水稻,借助周期性的灌水、排水过程,溶洗土壤中的盐分,达到改良盐渍土的目的。经过连续4年的试验,土壤平均含盐量由试验前的0.45%降至第4个试验年的0.15%。从第1试验年到第4试验年,水稻产量由绝收逐渐增至4250 kg hm-2。试验结果表明,充分利用地表水资源,通过种稻改良强度盐渍土是可行的,同时也可为松嫩平原中、西部更大范围利用强度盐渍土壤资源、恢复生态环境提供科学指导。
The soil salinization in the middle and west parts of Songnen Plain is very serious. The improvement of saline soil is of great significance to the utilization of land resources and the improvement of ecological environment. In the Daan ancient river soda meadow salinized soil, alkalized saline and meadow alkaline soil plots to choose the experimental field, through the cultivation of rice, with periodic irrigation, drainage process, washing salt in the soil, to achieve the purpose of improving the saline soil . After 4 consecutive years of experiment, the average soil salt content decreased from 0.45% before the test to 0.15% during the 4th test year. From the first trial year to the fourth trial year, the yield of rice gradually increased from the absolute value to 4250 kg hm-2. The results show that it is feasible to make full use of surface water resources and improve the strength of saline soils through planting rice, and provide scientific guidance for utilizing the strength of saline soil resources and restoring the ecological environment in the middle and west of Songnen Plain at the same time.