【摘要】 对初级系比试验区47个橡胶树优树无性系幼龄期（2～7龄）的生长量（茎围）进行调查分析，结果表明：参试的47个橡胶树无性系间生长量差异极显著，2～7龄生长量均值分别为10.42、18.08、24.60、32.56、40.80、44.73 cm，无性系16、39、57的年生长量均排在前五。7龄时，47个无性系中，生长量以6、16、39的较大（均大于50.00 cm）；生长量大于45.00 cm的无性系有24个，占51.06%；生长量小于45.00 cm的有23个，占48.94%。2～7龄无性系的增长量均值分别为7.62、6.51、8.05、8.27、3.96 cm,6年的年均增长量为6.88 cm，其中无性系39、52较大，超过8.00 cm，其次是无性系6、16、36、55，均超过7.60 cm。依据生长量均值和增长量均值进行聚类，可分别将参试的无性系划分成3组和4组。其中生长量均值分别为34.98、25.94、29.25 cm，第Ⅰ组生长量均值最大，包含无性系16、39、57；增长量均值分别为7.67、7.49、6.17、6.85 cm，第Ⅰ组增长量均值最大，包含无性系16、27、39、57。综合分析，无性系6、16、39、57生长情况较好。更多还原

【Abstract】 The growth volume(stem circumference) of 47 Hevea brasiliensis clones at juvenile stage(2～7 years old) in primary comparative test area were investigated and analyzed. The results showed that the difference of growth volume among the 47 Hevea brasiliensis clones reached a very significant level, the average growth volume was 10.42, 18.08,24.60, 32.56, 40.80, 44.73 cm, the annual growth volume of clones 16, 39 and 57 ranked in the top five. At the age of 7, the growth volume of clones 6,16 and 39 was larger(greater than 50.00 cm); there were 24 clones with growth volume greater than 45.00 cm, accounting for 51.06 %, and 23 clones with growth volume less than 45.00 cm, accounting for 48.94%. The average increment of growth of 2～7 years old clones was 7.62, 6.51, 8.05, 8.27, 3.96 cm, with an average annual growth of 6.88 cm in 6 years, and clones 39 and 52 were larger, more than 8.00 cm, followed by clones 6, 16, 36, 55, all more than7.60 cm. According to the mean growth volume and the mean increment of growth, the clones were divided into 3 groups and 4 groups, and the differences between the groups were extremely significant. The mean growth volume was 34.98,25.94, 29.25 cm, the average growth volume of the first group was the largest, including clones 16, 39 and 57. And the average increment of growth was 7.67, 7.49, 6.17, 6.85 cm, the average growth increment of the first group was the largest, including clones 16, 27, 39, 57. Therefore, the comprehensive analysis found that clones 6, 16, 39, 57 had better growth conditions.更多还原