水曲柳个体生长节律及优良单株选择试验

Growth Rhythm of Fraxinus mandshurica and its Selection Experiment on High-grade Individual-Plant

对水曲柳个体树高生长节律进行了研究。结果表明:各个体生长期无明显差异,速生期均在5月中旬至6月下旬,速生期生长量占全年生长量的70%～80%;个体间树高当年生长量差异显著,其中134#、146#、121#高生长优势明显,全年高生长量分别为76.2 cm、73.9 cm和73.6 cm,分别是对照个体的194.4%、188.5%和187.8%。初步选择出134#、146#、121#为优良个体。

Through the study of the high growth rhythm of the families of Fraxinus mandshurica , result shows that there is no obvious difference in the growth period of each family. The fast-growing period is from mid May to late June, and the growth rate of the fast-growing period accounted for 70%-80%of the annual growth.The variance analysis shows that there are significant differences in annual growth of tree height among individuals families, and height growth of Fraxinus mandshurica ‘134#’, Fraxinus mandshurica‘ 146#’, Fraxinus mandshurica ‘121#’ have obvious advantage. The annual height growth is 76.2 cm, 73.9 cm & 73.6 cm,which is 194.4%, 188.5%& 187.8% of contrast individual plant,respectively.Preliminary selection of comprehensive growth description index of Fraxinus mandshurica‘ 134 #’, Fraxinus mandshurica‘ 146 #’and Fraxinus mandshurica‘ 121 #’were selected as excellent individuals.