【摘要】 不同潜水埋深下玉米田土壤水分动态表现为:该区玉米田土壤水分的季节性变化可划分为3个阶段:春季缓慢失墒期(4~6月)、雨季干湿交替期(7~8月)、稳墒恢复期(9月)。地下水埋深愈浅,相同层次土壤含水率愈高。当地下水埋深较大时,0.6m以下土层含水率呈现明显的分层分布状态,表层受地下水补给的水量已大大减小,其降低的程度主要与各层次土壤的持水特性有关。更多还原

【Abstract】 The dynamic changes of the soil moisture in maize field at the different depth of groundwater table show that there exist three stages of the seasonal change of soil moisture: the gradual loss stage in the spring(April-June),the dry and wet alternant stage(July-August),the recover stable stage(September).The more shallow the depth of groundwater table,the higher is the soil moisture content coefficient at the same soil section.The soil moisture content below 0.6m soil layer shows the obvious section changes when the increase of depth of groundwater table,the water amount supplied by groundwater to soil surface decreases enormously,this mainly has relation with the water retention ability of the soil in different layer.更多还原