胡杨是杨属的一个亚属,包括5—6个种,广泛分布于我国内蒙、甘肃、青海和新疆沙漠地带。它们是沙漠及低凹盐渍化土壤上的唯一乔木树种,不仅有高度的抗旱和耐盐性,又因根系发达,比其它树种耐干旱、高温和风力更强。但材质较差,生长慢。近几年来,由于采用了米邱林远缘杂交的方法,已获得杨一胡杨的杂交种,它具有生长快,抗旱耐盐的特性。如苏联и.А.卡扎尔采夫培育出的新种,四年生高达5米以上,我们培育出的一年生苗也在1米左右。得到杨一胡杨有性杂种的方法如下:1.用低温处理刚开裂的花芽。在花芽将开放时,把带花芽的 Populus is a genus of Populus, including 5-6 species, widely distributed in Inner Mongolia, Gansu, Qinghai and Xinjiang desert areas. They are the only tree species in the desert and low salinization soils. They are not only highly resistant to drought and salinity, but are also more resistant to drought, heat and wind than other species because of their well-developed roots. But the material is poor, slow growth. In recent years, due to the use of rice Qiu Lin far edge hybridization methods have been Yang hybrid poplar, it has the characteristics of fast growth, drought and salt tolerance. Such as the Soviet Union и.А. Kazal Sev breed new species, four-year-old up to 5 meters or more, we nurture the annual seedlings are about 1 meter. The method of obtaining sexual hybrids of Populus euphratica is as follows: 1. The newly cracked flower buds are treated with low temperature. Flowers buds will be open when flower buds will be open