The treatment of 10kg organic fertilizer +0.5kg fertilizer 3 and different organic fertilizer +different P fertilizer was obvious higher than contrast in promoting dbh increment of poplar.

• 10 kg有机肥+0.；5kg3号复合肥和不同有机肥+不同磷肥的处理在胸径连年生长量上；也极显著高于对照。