杨树无性系区域化造林试验研究

Test Study on Regional Afforestation with Poplar Clones

以江淮1号杨(15-129)、江淮2号杨(17-57)等为试验材料,I-69杨为对照,通过多年追踪研究,对试验林杨树无性系的成活率、生长量、抗性等指标进行分析,采用主成分分析法对其生长适应性进行综合评价。结果表明,参试杨树无性系间在胸径、树高、单株材积等生长指标方面都存在极显著差异(p=0.0 001<0.01),9年生江淮1号杨、江淮2号杨的材积达到0.709 8 m^3和0.666 7 m^3,不仅超过I-69杨的20.1%、12.8%,且各项测试指标表现均高于其他无性系。其中江淮1号杨在综合指标评价中排名第1,江淮2号杨在江淮地区表现中排名第3,均优于对照I-69杨,适宜在长江流域推广。

In this paper, Poplar Clones including Jianghuai No.1(15-129), Jianghuai No. 2(17-57) were used as test materials with Poplar Clone I-69 as the control. A multi-year follow-up study was carried out and such indexes as survival rates, increments and resistances of the poplar clones in the test plantations were analyzed, and their growth indexes were comprehensively evaluated with principal component analysis(PCA). The results showed that the indexes including the DBH, height and individual volume of the tested poplar clones had extremely significant differences(p=0.0 001<0.01) with the individual volumes of 9-year-old trees of Jianghuai No.1 and No. 2 reaching 0.709 8 m^3 and 0.666 7 m^3 respectively, 20.1% and 12.8% higher than that of the control Poplar Clone I-69, and all the test indexes of Jianghuai No.1 and No. 2 were higher than those of the other clones. Poplar Clone Jianghuai No.1 ranked first in the comprehensive index evaluation and Jianghuai No. 2 ranked third, both were better than Poplar Clone I-69 and suitable for promotion in the Yangtze River Watershed.