作　　者： ; ; ; ; (阎顺国）; (柴来智）; (张和平）; (郇庚年）;

机构地区： 甘肃草原生态研究所

出　　处： 《草业学报》 1994年第3期52-60,共9页

摘　　要： 对碱茅及芦苇等几种主要草地盐分动态及其影响因素的研究表明，土壤盐分在剖面中随深度降低迅速下降，自然条件下盐分运动的活跃层为０～４０ｃｍ土层，灌水及植被均可加深盐分运动活跃层。春秋两季及植被收割后土壤积盐，其余季节则处于脱盐状况。地下水位深度，植被覆盖度及气象因素是影响土壤盐分动态的主要因子。 The dynamics of salt expressed as electronic condutivity and the main factors affecting them in suchgrasslands as Puccinellia tenuiflora and Phragmites australis community ,and so on were investigated in situ,Theresults showed that salt were reducing with depth decrease in the profile。Salt movement in the profilemainly occured in 0～40cm soil layer in natural condition, however,both irrigation and vegetationoccurren ce could make the active layers deeper.The salt up-gathering periods werefecorded in spring,early autumn and time periods soon after havesting respectively,and moreover,the desalinizing periodswere followed in the rest of the year except when the soil was frozen,The dominate factors influencing theforementioned dynamics of salt were underground water depth,plant vegetation coverage and thosemeteorological parameters related。

关 键 词： 河西走廊 盐分动态 盐渍土 草地

领　　域： [农业科学] [农业科学] [农业科学]