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在广东省阳西县 ,对赤桉、巨桉和细叶桉进行 10个 P处理水平的施肥试验 ,结果表明 :造林后 1～ 6 4个月期间 8次测定的树高和 9～ 6 4月期间 6次测定的胸径在 10个 P处理水平间和 3个树种间均有显著或极显著差异 ,P肥对促进 3种桉树树高和胸径生长的肥效明显 ,3个参试树种对P肥的需求也有明显差异 ,表现为 6～ 2 4个月期间观测的生长指标存在树种与 P肥的交互效应。各树种肥效明显的高峰区域的开始和持续时间也不同 ,为筛选施 P量创造了条件 ,讨论了参试树种造林时必须的施 P量
The results of 10 P treatments on Eucalyptus urophylla, Eucalyptus grandis and Eucalyptus globulus in Yangxi County of Guangdong Province showed that the tree height and the height of 8 measurements in the period from 1 to 64 months after planting were between 9 and 64 There were significant or extremely significant differences in DBH between 6 treatments and 10 P treatments and 3 tree species during the month. The effect of P fertilizer on the tree height and DBH growth of 3 species of Eucalyptus was obvious. There is also a significant difference in the demand for fertilizer, which is manifested as the interaction between tree species and P fertilizer observed in the growth indicators observed between 6 and 24 months. The beginning and duration of the peak area where the fertilizer effect of each tree species is obvious is also different, which provides the conditions for screening and applying the amount of P, and discusses the amount of P required for reforestation