【摘要】 以从祁连县小叶杨主要分布区选取的50个优树无性系为材料,对其生长特性进行测定分析,以期筛选出速生、丰产、观赏价值高、适应性强的小叶杨优良无性系。结果表明:无性系T43、T42、G49、D31、T38、T35成活率均达80%以上;无性系T43、T42、S15、S3、S26的苗高均高于85 cm;地径排序依次是T39、T43、T38、S21、S13、T42,显著大于其他无性系;叶面积排序依次是T42、T43、T36、T35、T39,明显大于其他无性系;T43、T42、T39、T35、T40、S26的叶量大,观赏性高。综合各指标可知:T43与T42无性系的成活率高,速生繁殖能力强,观赏价值高,对当地的气候和试验地的土壤条件有较强的适应性。更多还原

【Abstract】 With the aim of fast growing, fertility, ornamental value and adaptability of superior Populus simonii clones, fifty samples in the main distribution area of Qilian County were selected by determination and analysis of growth characteristics.It turned out that survival rates of T43,T42,G49,D31,T38,T35 were all above 80%;seedling heights of T43,T42,S15,S3,S26 exceeded 85 cm;ground diameters of T39,T43,T38,S21,S13,T42 were obviously higher than the others;the order of leaf areas was T42,T43,T36,T35,T39, evidently larger than the other clones;amount of leaves and ornamental value of T43,T42,T39,T35,T40,S26 surpassed the rest of the clones.The comprehensive indicators showed that T43 and T42 had higher survival rates, fast growing rates, great ornamental values, which had strong adaptability to the local climate and soil conditions of the test site.更多还原