浑善达克沙地黄柳活沙障防风固沙效益的研究

Research on the Effect of Wind-breaking and Sand-fixation of Salix gordejevii Living Sand Barriers in Hunshandake Sandy Land

本文研究了浑善达克沙地流动沙地上黄柳活沙障的防风固沙效益,通过对设置3年后的不同类型的活沙障进行测定和分析,得出如下结论:沙障设置3年后,沙地趋于固定,障内植物种类明显增多;设置黄柳活沙障的区域内下垫面粗糙度显著增大,风速明显减弱,其顺序为:4 m×4 m黄柳网格沙障>6 m×6 m黄柳网格沙障>间距4 m的黄柳带状沙障>间距6 m的黄柳带状沙障>流沙,而且黄柳网格沙障降低风速的能力较带状沙障强;当旷野平均风速为7.86 m/s时,只有流沙和间距6 m的黄柳带状沙障起沙,其他几类活沙障内均不起沙。

In this paper,the effect of wind-breaking and sand-fixation of Salix gordejevii living sand barriers was studied in moving sand of Hunshandake Sandy Land.Through measurement and analysis on living sand barriers in different types set up for 3 years,the results showed： after 3 years of setting up sand barriers,the sandy land tended to be fixed,the varieties of vegetation increased obviously.In the area of Salix gordejevii living sand barriers,the ground roughness increased and wind speed decreased obviously,with an order of 4 m×4 m Salix gordejevii grid sand barriers 6 m×6 m Salix gordejevii grid sand barriers 〉4 m Salix gordejevii ribbon sand barriers 6 m Salix gordejevii ribbon sand barriers 〉moving sand.When the average wind speed was 7.86 m/s in the field,only in moving sand and 6 m Salix gordejevii ribbon sand-barriers,the sand can be blown,which the sand can＇t be blown in other types of living sand barriers.