黄土高原西部植物耗水实验研究

针对兰州地区8种常见植物的盆栽试验，比较了其耗水量的变化特征，结果表明：在充分供水条件下，8种植物在试验期间内都能正常生长，植物耗水量从大到小排序为：柽柳＞柠条＞芨芨草＞侧柏＞甘蒙锦鸡儿＞紫穗槐＞红砂＞珍珠；在集雨条件下，植物耗水排序为：芨芨草＞珍珠＞柠条、侧柏、甘蒙锦鸡儿、＞红砂、紫穗槐＞柽柳，但柽柳和紫穗槐在集雨条件下生长出现干枝，生长不好。在雨养条件下，除红砂、甘蒙锦鸡儿、珍珠受到干旱胁迫不明显外，其余植物不同程度上有枯叶出现。紫穗槐死亡，柽柳接近死亡，其他植物耗水排序为：珍珠、芨芨草＞侧柏、甘蒙锦鸡儿、柠条＞红砂。

Experimental Study on Plant Water Consumption in West of Loess Plateau

Water consumption(WC) of 8 dominant plant species in Lanzhou was measured by pot experiment.The results showed that all plant species were well growing during experiment periods in sufficient water supply condition,and the water consumption of all species ranked as follows: Tamarix ramosissima>Caragana korshinsk>Achnatherum splendens >Platycladus orientalis>Caragana opulens>Amorpha fruticosa >Reaumria soongorica>Salsola passerine; In controlled water supply(rainwater harvesting) condition,the WC ranked as A.splenden >S.passerina>C.korshinsk,P.orientalis,C.opulens>R.soongorica,Am.fruticosa>T.ramosissima,but T.ramosissima and Am.fruticosa badly developed;Whereas in rainfed condition,Am. fruticosa was not survived,T.ramosissima was totally defoliated,and the WC were ordered as Salsola passerine,A.splenden >P.orientalis,C.opulens, C.korshinsk>R.soongorica.