钻天柳嫩枝扦插苗生长特性研究及优良单株选择

对6年生钻天柳嫩枝扦插苗生长特性及优良单株选择进行研究的结果表明,6年生钻天柳嫩枝扦插苗高生长平均4.8578 m,最高6.5 m;胸径生长平均31.3079 mm,最大58.24 mm。胸径、树高分布基本遵循正态分布;钻天柳扦插苗初期栽植苗木等级对钻天柳树高生长影响较大,栽植密度对钻天柳胸径生长影响较大;初步选出优良单株15株,初选优良单株树高平均值5.84 m,超过3块地树高平均值的20.22%,最优个体超过树高平均值的33.81%;初选优良单株胸径平均值50.97 mm,超过3块地胸径平均值的62.80%,最优个体超过胸径平均值的86.02%。

Study on the Growth Characteristics of Softwood Cutting of Chosenia arbutifolia and Selection of Excellent Individual Trees

The growth characteristics and selection of excellent individual of 6-years-old softwood cuttings of Chosenia arbutifolia were studied in this paper.The results showed that the average height of 6-years-old softwood cuttings was 4.8578 m,the highest was 6.5 m,and the average dbh was 31.3079 mm,Maximum58.24 mm.The height and dbh distribution of Chosenia arbutifolia were in accordance with normal distribution,the height growth of Chosenia arbutifolia was influenced by the grade of the seedlings planted at the initial stage,and the dbh growth of Chosenia arbutifolia was influenced by the planting density.The average height of excellent individual tree is 5.84 m,which is more than 20.22%of the average height of tree in 3 plots,and the best individual is more than 33.81%of the average height of tree in 3 plots.The average dbh of excellent individual tree is 50.97 mm,which is more than 62.80%of the average dbh of 3 plots The best individual exceeded 86.02%of the mean dbh.It provides materials for ornamental Chosenia arbutifolia and cultivation of large diameter timber of Chosenia arbutifolia.