沙拐枣是蓼科的一个属,种类较多,我国有十余种,西北各省(区)均有天然分布,大都生长在流动、半固定的沙丘沙地上,一般高0.5—2.0米(少数种高达4—5米),分枝很多,呈灌丛状,丛幅0.5—2.0米。 沙拐枣无叶(以嫩枝进行光合作用),根系异常发达(水平根长20余米),非常耐旱,抗风烛沙割性极强,烈风后枝干上没有明显伤痕,裸露于地表的根系能长出根蘖苗,发育成新植株。沙拐枣枝条茂密,因而(?)于积沙,沙埋后反而促其生长,恰如水涨船 Calligonum is a genus of Polygonaceae, with more species. There are more than ten species in our country. Each province (region) in the northwest has a natural distribution. Most of them grow on mobile and semi-fixed sand dunes, usually 0.5-2.0 meters in height Species up to 4-5 meters), a lot of branches, was shrublike, Cong amplitude 0.5-2.0 meters. Calligonum no leaves (to shoots for photosynthesis), root abnormalities developed (horizontal root length of 20 meters), very drought-resistant, anti-wind sand cut extremely strong, no significant flaws on the branches after the gale, exposed Roots of the surface can grow root tillers, develop into new plants. Saw jujube branches dense, and therefore (?) In the sand, sand but instead to promote their growth, just as the water rose