中文摘要：

研究了塔里木河下游主要荒漠植物（21种）繁殖体的形状、大小、质量（17种为种子，4种为果实）。用三维方差衡量繁殖体形状，用三维之和衡量繁殖体大小，繁殖体百粒质量衡量繁殖体质量。结果表明：1）21种植物繁殖体的形状差异很大，且豆科（Fabaceae）植物的繁殖体形状接近圆球形，菊科（Compositae）植物的繁殖体形状较大地偏离圆球形（方差〉0．05）。21种植物繁殖体大小、质量差异也很大；2）繁殖体大小的表现趋势与其相应的质量的表现趋势具有一定的一致性；3）研究区主要荒漠植物中，多年生草本植物的种类虽然不及灌木（半灌木）的种类丰富，但其繁殖体平均质量却比灌木（半灌木）多18％；4）在21种植物的繁殖体中，9种具有持久土壤种子库。100％的柽柳科（Tamaricaceae）植物、100％的菊科植物都具冠毛，这些附属物对植物繁殖体的传播和定居具有重要的意义。

英文摘要：

A comparative study was conducted on the shape, size, and mass of diaspores of 21 main desert plants in the lower reaches of Tarim River. The diaspores included 17 kinds of seeds and 4 kinds of fruits. Their shape was measured by three-dimension variance, size was measured by the sum of three-dimension, and mass was measured by 100-seed mass method. The diaspore shape of test plants varied greatly, with that of Fabaceae being nearly spherical, and of Composi- tae greater deviating spherical （ variance 〉 0. 05 ）. Diaspore mass also had greater difference. There was a definite consistency between the trend of diaspore size and mass. The mean mass of perennial herb＇ s diaspore was 18% heavier than that of shrub and semi-shrub＇ s diaspore, though the perennial herb had lesser species than shrub and semi-shrub. Nine of the 21 main desert plants had persistent seed bank. 100% of Tamaricaceae and 100% of Compositae plants had pappus which is of significance for the dispersal and settling down of the diaspore.