元江县尾叶桉扦插苗造林适应性调查研究

对用尾叶桉扦插苗2001~2004年在元江县造林的林木进行胸径及树高生长调查及分析.结果表明:在490 m的低海拔干热河谷地区,4.5 a生尾叶桉的平均树高达20.1 m,年均高生长4.5 m;平均地径达22.8 cm,年均生长5.1 cm,其生长量均超过国家速生树种标准的4倍以上;在海拔1 100、430、800、1 500 m范围内,尾叶桉树高及胸径生长差异不显著,与海拔2 100 m和1 750 m生长的树木相比,差异达极显著水平,说明尾叶桉的适生海拔范围是430~1 500 m;在相同立地条件下,尾叶桉平均年树高生长量分别比兰桉、赤桉和柠檬桉高0.8、0.7和0.9 m,平均胸径生长量比兰桉、赤桉和柠檬桉高1.8、3.2和3.3 cm.

Adaptability Research of E.caphylla Cuttings Seedlings Afforestation In Yuanjiang

The diameter and height growth of trees planted in Yuanjiang by using eucalyptus caphylla cuttings seedling from 2001 to 2004 were investigated and analyzed.The results showed that： in low-altitude of 490 m dry-hot valley,the average height of 4.5 year old eucalyptus caphylla tree went up to 20.1 m,yearly average height growth of 4.5 m;average ground diameter to 22.8 cm,the average annual growth of 5.1 cm,its volume growth exceeded the national fast-growing species for more than four times the standard;at altitude of 1100,430,800,1500 m within,the difference of eucalyptus high and DBH growth was not significant,with trees at altitude of 2 100 m and 1 750 m,the difference reached a significant level,indicating the suitable elevation range for eucalyptus caphylla are 430 to 1 500 m.In the same site conditions,average tree height of eucalyptus caphylla was higher respectively,than the blue gum,Eucalyptus and lemon eucalyptus height of 0.8,0.7 and 0.9 m,average DBH growth of eucalyptus caphylla higher than blue gum,eucalyptus caphylla and lemon of 1.8,3.2 and 3.3 cm.