不同生长调节剂对大叶速生槐扦插繁殖生长的影响

Effects of Different Growth Regulators on Cutting Propagation of Robinia pseudoacacia

采用不同生长调节剂对2年生大叶速生槐主杆进行扦插繁殖试验,结果表明：①扦插平均成活率在24.97％～37.84％,显示出IBA＞NAA＞GGR＞ABT＞CK（对照）＞2.4-D的规律;扦插平均成活率的季节影响变化为秋季（62.08％）＞冬季（50.74％）＞春季（11.11％）＞夏季（6.95％）.②扦插的各生长量指标（主杆高、分枝及叶片数,等）以NAA和ABT处理较高,2.4-D最低;扦插3月龄的幼苗总生物量显示出NAA＞ GGR＞ABT＞IBA＞CK＞2.4-D的规律,其中地上部分分别占94.36 ％～99.16％.③综合分析得出,在秋、冬季节里,采用生长调节剂NAA和GGR处理2年生大叶速生槐扦插的幼苗成活率、生长量及生物量较高.

Using different growth regulators on two-year-old Robinia pseudoacacia in the main stem for cutting propagation test. The results showed that （1） the average survival rate of cuttage was between 24.97 % and 37.84 %, and the law that IBA〉NAA〉GGR〉ABT〉CK （comparison） 〉2.4-D was shown; the average survival rate of cuttage changed with the seasonal variation-62.08 % （inautumn） 〉50.74% （inwinter） 〉11.11% （inspring） 〉6.95% （insummer） （2） The growth index of cutting propagation （including the height of main stem and the number of branch and leaf） illustrated that NAA and ABT had powerful treatment effects, conversely 2.4-D had the weakest treatment effect. The total biomass of three-month-old cutting seedlings revealed another law that NAA〉GGR〉ABT〉IBA〉CK （comparison） 〉2.4-D, and the ground part occupied from 94.36 % to 99.16 %. （3） The comprehensive analysis proves that the increment, the total biomass, and the survival rate of two-year-old Robinia pseudoacacia cutting cuttage achieved a higher level when they were handled with NAA and GGR.