摘要
通过对中国东北松嫩平原西部自然环境调查和分析,结合当地作物不同生长阶段的需水量及水分亏缺,在试验区选择对照区和不同淋洗定额灌溉区进行淋洗试验,结果表明:相对于承压地下水和雨水,松嫩平原西部丰富的潜层微咸水对苏打盐渍土有更高的入渗速率,达到19.4mm/h;微咸水淋洗使土壤中的盐分下移,在耕层土壤(0～0.6m),随着淋洗定额的增加,ECe和SARe明显降低,作物的产量相对于对照亦有明显提高。
According to the survey and the analysis about the natural environment in the western Songnen Plain of the Northeast China, and thinking of the water requirement and the water deficit of the local crops in differently growing periods, we made some leaching experiments in the contrast field and the different leaching quota fields that are in the experimental cite. The result shows: the infiltration rate of mildly salty water in the unconfined water layer is 19.4 mm/h, much higher than that of the rainfall and the local confined water; the salty compositions in the salinesodic soil move down with the leaching, and the ECe and SARe values of 0~0.6 m decreased evidently with the increasing of leaching volume, but the crop yield in treatment fields increased obviously compared with that of the contrast.
出处
《水土保持学报》
CSCD
北大核心
2003年第2期145-148,共4页
Journal of Soil and Water Conservation
基金
国家科技攻关课题"松嫩平原西部盐碱地综合治理及高效利用模式与技术研究"(2001BA508B05)
中国科学院知识创新工程项目及吉林省农业综合开发大安示范区资助
