桉树无性系在阳江地区适应性及生长比较研究

Study on adaptability and growth traits of Eucalyptus clones in Yangjiang

在广东阳江地区对5个桉树无性系、4种肥料、3个年度生长性状进行研究分析。结果表明:WC3和DH42-6适宜在丘陵背风面种植,而DH19-6、DH32-13和DH32-29抗风性较强,适宜迎风面种植;肥料特别是基肥影响着桉树无性系早期生长,施用量较多时促进生长,同时生长快的树木受风面积增加,降低了保存率,从而影响着最终的生长水平。3个年度所有生长性状间具有较强的相关性,有利于生长的预测。最优种植模式为:基肥以0.50 kg/穴为最佳,深穴种植及前3年每年抚育和施适量追肥是提高其生长和抗风性能的重要措施。

The three years growth traits and adaptability of 5 Eucalyptus clones including with 4 varieties fertilizers, in Yangjiang city had been studied. The results show that： the clones such as DH19-6, DH32-13 and DH32-29 had stronger wind-resistance than WC3 or DH42-6, and the latter two were only suitable for planting on the leeside of hills, the first three were suitable for planted at windward of hills; fertilizer, especially the base fertilizer affected early growth of the eucalyptus clones; large fertilization dosage amounts promoted growth of the clones; there were close correlation among the growth traits in 3 years old which can be use for the future growing prediction. The optimal planting method for the suitable growing level is 050 kg/hole fertilizer, more deep hole for rootgrowing, annual tending and using topdressing processing in early management.