中文摘要：

为了研究沙埋对种子萌发和幼苗出土的影响,本论文通过温室控制实验,对梭梭和驼绒藜出苗与沙埋的关系进行研究。实验进行了0 cm、0.5 cm、1 cm、1.5 cm和2 cm共5个沙埋深度处理,每个处理做3个重复。结果表明,梭梭和驼绒藜0 cm埋深与其它埋深的萌发率差异显著;随着沙埋深度的增加,梭梭和驼绒藜种子出苗率逐渐降低,没有沙覆盖（0 cm埋深）时,梭梭和驼绒藜种子的出苗率达到最大,分别为80%、90%,沙埋深度为2 cm时,梭梭和驼绒藜幼苗不能出土;梭梭和驼绒藜种子在0 cm沙埋深度下的出苗速率最大,分别为60%、69.8%。

英文摘要：

This paper studied the effects of sand - burying on the seed germination and seedling emergence of Haloxylon ammodendron and Ceratoides latenso The experiment was conducted in a greenhouse. Five treatments of artificially sand - burying to depths 0cm,0.5cm,1cm,1.5cm and 2cm were designedo There were 5 treatments for each species with 3 replicates of each treatmento The results showed that the seed germination of Haloxylon ammodendron and Ceratoides latens were only significantly different between 0 cm and other burial depths. With the increase of depth, the seedling emergence of Haloxylon ammodendron and Ceratoides latens decreased. When there is no sand cover （0cm depth） ,the seedling emergence of Haloxylon ammodendron and Ceratoides latens reached the maximum were 80%, 90% . Sand - burying at a depth of 2cm, the seedlings of Haloxylon ammodendron and Ceratoides latens can not be excavated ; The seedling emergence rate of Haloxylon ammodendron and Ceratoides latens reached the maximum were 60,69.8 at the sand burial depth of 0cm.