【摘要】 水分和土壤盐分是影响中麻黄在河西沙区分布、丰产栽培的主要因子。随着西去 ,降雨量减少 ,干燥度增加 ,中麻黄群落递减 ;中麻黄幼苗具有一定的耐盐性 ,成苗后耐盐能力显著增强 ,当土壤含盐量在 0 .82 %时 ,出苗率降为 41% ,盐害死亡率 48.8% ;年灌水量以 15 0 0～ 2 2 5 0m3 ·hm-2 为宜 ,施N、P肥可增加中麻黄高生长和分蘖枝数。中麻黄是河西沙区生态建设的重要植物 ,其植丛的固沙能力强 ,通过积沙固沙可形成固定、半固定沙地。依据中麻黄生长规律 ,集约栽培 ,减缓对天然植被的破坏 ,使其发挥最大的经济效益和生态效益。更多还原

【Abstract】 The investigation to \%Ephedra intermedia\% natural resources in Hexi desert area shows that the distribution area is about 133 000 hm 2 . 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 m 2 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.更多还原