共和盆地沙区水分含量消长趋势评价

Evaluation Dynamic Tendency of Dunes's Moisture in Gonghe Basin

通过青海共和盆地流动沙丘和固定沙丘0－40cm层（植物根层）水分含量的观测测定，建立了二元二次多项式回归方程，评价流动沙丘和固定沙丘在生长季期间（5－10月），水分消长趋势变化，为改造和利用沙丘沙地提供可靠依据。

Dynarnic changed tendency of moisture was studied by duality quadraticmultinomal spread determine spot on migratory dunes and fixed dunes. The results of studiedindicated that the moisture of dunes is correlation with precipitation, evaporation, temperature and vegetational types. The fewest moisture position is on the stosssides and summit.It's the most and stable position of moisture is on the foot of the lee -side and behind the lee- side aftout. Thelefore these positions are the most suitable to growth plants for control theactive sand- fter the migrator dunes were fixed a few years, it's moisture will be reducinggradually,and even happened withered extent. How could the dunes moisture rise enough tosupport the plants growing need? The problem is becomming the one of the importance research subjects on desertification from then on. In order to speed up the rehabilitation of desertificational land, the biological measures has to combine irrigation technique.