【摘要】 对尾巨桉无性系造林时6种基肥处理的试验林2年来的观测结果研究表明,不同基肥造林对幼林高生长仅在林龄5个月时有显著影响,钙镁磷肥加复合肥作基肥的树木高生长显著高于仅用钙镁磷肥作基肥和无肥处理,但5个月后各处理高生长差异不显著;而不同基肥对幼林径生长和单株材积影响显著,6种基肥中以钙镁磷肥加复合肥作基肥的生长效果最好,林龄24个月时,其胸径、单株材积分别达8.70 cm、0.033 24 m3,均显著大于其他5种基肥处理,其他5种基肥处理间差异不显著。复合肥中含有氮、磷、钾等养分元素,因此以含氮、磷、钾等养分元素的肥料作尾巨桉造林基肥为佳。更多还原

【Abstract】 Six base fertilizer treatments were applied on the field planting of Eucalyptus urophylla×E.grandis with the objective to study the effects of different fertilizers on saplings.The growth of saplings was continuously observed for two years.The results showed that the differences of sapling height growth between the tested treatments were only significant at 5 months after fixed planting,the effect of combination use of calcium magnesium phosphate fertilizer plus compound fertilizer was significantly higher than calcium magnesium phosphate fertilizer or the treatment of no fertilizer.Since then,the sapling height of different fertilizer treatments did not produce significant differences,the diameter growth and individual volume,however,were significant different between the tested fertilizer treatments.Among all the fertilizer treatments,the effect of combination use of calcium magnesium phosphate fertilizer plus compound fertilizer was the best,24 months after fixed planting,the diameter and individual volume achieved 8.70 cm and 0.033 24 m3,significantly higher than other five tested treatments,and the differences among other five treatments were not significant.The compound fertilizer contains the elements of N,P and K,it is recommended to apply compound fertilizer as the base fertilizer in field planting of Eucalyptus urophylla×E.grandis.更多还原