中国北方棉区从 2 0世纪 40年代开始生产应用陆地棉品种 ,至 80年代末有六次大的品种更新 ,后三次为中国自育品种 ,其改进与进展学术界评价不一。此项研究 ,1 991年将历代储存原种大田恢复活力 ,1 992～ 1 994年置于无病地条件观察、测定 ,在生物特征、生理指标和农艺形状诸方 Up to the late 1980s, there have been six major varieties of cotton cultivars in China’s northern cotton region since the 1940s, and the second three are Chinese self-breeding varieties. The academic evaluation of their improvement and progress is different. This study, in 1991 to restore the original storage of the original field Daejeon vitality, from 992 to 1994 placed in disease-free conditions observed and measured in the biological characteristics, physiological indicators and agronomic shape Zhu Fang