作　　者： ; ; ;

机构地区： 中国科学院长春地理研究所

出　　处： 《中国生态农业学报》 2001年第1期43-45,共3页

摘　　要： 根据农田土壤水分要素实测资料,结合年度气象因素分析了三江平原大豆田水分收支及生长季农田土壤水分盈亏状况。结果表明,正常年份作物生育期内自然降雨基本能满足大豆蒸散耗水需求;发生季节性干旱且生育期降水与正常年份持平但分配不均时,大豆生长受到阶段性水分胁迫,农田水分收支平衡;若生育期降水量比正常年份少则大豆生长受到严重水分胁迫,自然降雨不能满足作物需水量。近年,该区季节性干旱频繁发生,研究农田水分平衡和区域水资源有效利用是很重要的。 According to the field experiments and the climate data in Sanjiang Plain wetland,the profit and loss of soil water in soybean field were analyzed. The results showed that the natural rainfall could meet the needs of soy-bean water consumption in normal years and the growth of soybean would suffer from water stress in arid season. The seasonal drought has taken place here frequently in recent years. So it is very important to study water balance and effective utilization of regional water resources.

关 键 词： 三江平源 湿地 农田水分特征 雨养农田 自然降雨 农田荒散 农田径流 土壤水分

领　　域： [农业科学] [农业科学]