晋宁县引种元宝枫优良无性系嫁接苗木的年生长节律研究

Study on Growth Rhythm of Grafted Clones from Acer truncatum Plus Trees Introduced into Jinning County

2007年,从12个元宝枫优良无性系上采穗,在晋宁县嫁接苗木2 400株,设5次重复,随机区组排列,对其嫁接成活率及苗木的株高、基径、生长节数的年生长节律进行了调查与分析,结果表明,引种的12个无性系苗木中,92号嫁接成活率最高,为94%,88号最低,为62.5%。嫁接成活率在无性系内部变异不大,在无性系间达到了极显著差异。嫁接苗木的高生长高峰期为5～6月,基径的生长高峰期集中在5～7月,7月后生长速度变慢;生长节数每间隔1个月增长1次,5月增长量最大,其后逐渐减少;利用苗高、基径、生长节数平均数进行Logistic方程拟合,拟合效果均达到了显著水平。

Investigation and analysis on the graft survival rate of Acer truncatum plus trees and plant height, basal diameter, node numbers was made during 2007. The result showed that： the graft survival rate of No. 92 was the highest （94 % ）, and No. 88 was the lowest （62. 5 % ）. The differences among the 12 clones were extremely sig- nificant. Plant height of grafted clones growth concentrated on the May - June, and basal diameter growth concen- trated on the May - July, after July which became slow]y. The node numbers growth once every two months, the largest in May, then gradually reduced. At the same time the fitting effect with Logistic equation was significance.