关键词: 土壤改良, 土壤改良, 田菁, 生物量, 磷石膏, 含盐量

Abstract: Due to the influence of moisture and vegetation, the surface sand flow of abandoned lands of differentSabandoned ages presented regular variation. Abandoned lands of differentSabandoned ages as the research object in Minqin county of the Shiyang River basin, the paper determine the characteristics of sand flow structure of abandoned lands in differentSSabandoned ages by using 100cm height sand flow observation instrument. The result showed that：(1) Total sand transport flux showed an increasing trend with the increasing of abandoned time, the longer the abandoned time the greater sand transport flux, at the same time sand transport flux are greatly influenced by the sample area surrounding landscape environment; (2) Sand transport flux of abandoned lands of differentSages changed regularity with the seasons, and closed to the wind speed, the size of sand transport flux was consistent with regular of local wind season; (3) Sand transport flux of wind-sand flow of abandoned lands overall showed the binary linear correlation with abandoned time, the correlation coefficient was 0.88;(4) Total sand transport flux of 10 samples were divided into three classes through cluster analysis, For a class of 17 years, 13 years as the category, for the rest of abandoned time for category. Due to the difference of abandoned time and the influence of the surrounding landscape vegetation, the sand transport flux of wind-sand flow of differentSabandoned lands showed very great difference.The results provided scientific basis for utilization of abandoned lands .