巨尾桉株行配置造林试验研究

Study on the Plantation Spacing of E.grandis×E.urophlla

巨尾桉是最速生高产的桉树，在相同的条件下造林，单位面积株数相等（１６６５株／ｈｍ２），采取四种株行配置造林方式，生长差异非常明显，株行距１ｍ×６ｍ的，定植后３年５个月，平均树高１３．７２ｍ，平均胸径１０．１４ｃｍ，蓄积量６８．７６ｍ３／ｈｍ２，长势名列前茅。

E. grandis×E. urophlla is the most quickly-growth and highest yield in Eucalyptus. Under the same condition and the equal number of trees in a unit area (1665 N/hm2). There were significent differences in growth among the four treatments of plantation spacing. The trees with the space of 1m×6m 3. 5 years after plantation had an average height of 13. 72 m and average diameter at breast height of 10. 14 cm, growing stores was 68. 76 m3/hm2. The growth is in the first place.