Based on experiment of pot-cultivating under different degree of drought stress for 4 hemp cultivars: Yunma 1, BM001, Wandama 1 and Xinyang 1, their drought tolerance, including physiological characteristics and growth, were comprehensively evaluated and compared. The results showed that: 1) Leaf relative water content of Yunma 1 and Wandama 1 were declined fast in earlier stage and later stage of drought stress respectively. For BM001 and Xinyang 1, leaf water content decreased constantly during the whole stage of drought stress. It indicated that different hemp cultivars had different response mechanism to drought tolerance. 2) The protective enzyme activities of 4 hemp cultivars sharply declined when water content of soil was below 15%, indicated that this percentage of water content was a critical point for cultivating hemp. 3) Compared with the other three hemp cultivars, BM001 could tolerate a higher degree of drought stress for its plant height and stem diameter were least effected, which indicated that BM001 could be used for breeding the drought resistance varieties.%通过对4个不同地域来源的大麻品种:云麻1号、BM001、皖大麻1号和信阳1号的盆栽干旱胁迫试验,研究了不同程度干旱胁迫对这4个大麻品种生理特性和生长的影响.结果表明:1、云麻1号和皖大麻1号的叶片含水量分别在干旱胁迫前期和后期下降幅度较大,BM001和信阳1号的叶片含水量在干旱胁迫中呈持续下降状态,说明不同的大麻品种对干旱胁迫的响应模式不同；2、在土壤含水量低于15％时,四种大麻叶片保护酶活性骤降,说明15％的土壤含水量可作为大麻抗旱栽培措施的临界点；3、干旱胁迫对BM001的株高和茎粗生长影响较其他3种品种小,说明这一品种的抗旱能力较强,可用于大麻抗旱品种的选育.
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