摘要
半湿润地区沙地在植被作用下土壤水分动态随季节变化，可以划分为春、夏、秋、冬四个阶段。随土层深度而增加可划分出几个明显层次；浅耕层，根系作用下水分极活跃变化层，地下水持续影响层。由于不同植物生氏季不同，植物发育状况不同，生长所处位置不同而呈现出特定的土壤水分变化形势。降水、土壤性质、地下水强烈地影响着本沙地土壤水分的动态变化。植物根系对土壤水分动态变化影响明显。植被覆盖下的半湿润沙地表层干沙层发育最大可达４—５ｃｍ。
Semi-humid varibility of sand-larnd water influencing by vegetation can be divided Spring,Summer,Autumn,Winter four phrases with the seasons change. From the top to the bottom of a retrical profile there exist four clearly distinctive layers of soil water:shallow ploughing layer, active layer influencing by root system, stable layer influencing by groud water. Different vegetation show speoally soil water variation development according geographical position. Precipitation, soil characteristic ground water intense influence the trends change of soil water. Root system of vegetation clearly influence the trends change of soil water. Semi-humid sandy-land dry sand layer depth can reach 4-5cm.
出处
《干旱区研究》
CSCD
北大核心
1994年第4期58-63,共6页
Arid Zone Research
关键词
植被
半湿润地区
沙地
水分动态
Soil-variability, Sandy-land, influencing by vegetation, the semi-humide zone.
