关键词: 河西荒漠区, 中麻黄, 栽培学因子, 积沙固沙

Abstract: The investigation to Ephedra intermedia natural resources in Hexi desert area shows that the distribution area is about 133 000 hm². Soil moisture and salinity are the main factors influencing the high yield cultivation and management. With the decreasing of precipitation (250~30 mm) from east to west, both of the distribution and the growth are decreased obviously. Saline soil and high altitude (above 2 800 m) also limit its distribution. Its saline tolerance is relatively high in seedling stage and gradually become higher with growth. When the soil salt content reaches 0.82%, the seedling ratio is reduced to 41% and the death rate gets 48.8%. Suitable irrigation and fertilizers may increase the growth and biomass accumulation; rotated cutting and cultivation in time can increase the yield and quality. Ephedra intermedia is one of the key sand fixation plants in desert area. The communities often accumulate sands and form fixed and semi-fixed dunes with 1~70 m² area and 0.3~0.7 m height. Through the resources restoration and cultivation in Hexi desert area, it will produce large economic and ecological benefits.

Key words: Hexi desert area, Ephedra intermedia, cultural factors, sand fixation effect