尾巨桉无性系不同造林措施林分生长调查

摘要

Taking Eucalyptus urophylla × E. grandis clone as planting variety, demostrating by de- signing five different planting densities and six different fertilizing combinations, the growths of 43- month-old sample forests with different planting measures were analyzed. The results showed that the growths of tree height, DBH and signal tree volume decreasd with the increase of stand density, while the stand accumulation increased, the highest of which reached to 129.28 m^3/hm^2. The stand forest after manuring performed better, the accumulation of which was 1. 667 times more than that without manuring, and the more amount of fertilization used, the better it growed. If manuring after one month followed planting, it was a good selection to choose phosphatic fertilizer or compound fertilizer as base fertilizers.%以尾巨桉（Eucalyptus urophylla×E.grandis）无性系为造林品系，设计了5种不同造林密度和6种不同施肥组合进行造林示范，对43个月生不同造林措施示范林生长量进行分析。结果表明，尾巨桉无性系林分树高、胸径、单株材积生长量随林分密度的增加而减小，但林分蓄积量则有随林分密度的增加而增大趋势，最高密度的林分蓄积量最大，达129．28m^3／hm^2；造林后追肥可明显促进林木生长，追肥的林分蓄积生长量是不追肥的166．7％，并且以追肥用量大的林木生长效果更好；在造林后1个月及时追肥情况下，可选用磷肥或复合肥作基肥。