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本项研究历时４年，研究结果显示，营造蓝桉纯林会引起林地土壤肥力明显降低，有机质、全Ｎ、有效Ｎ、Ｐ、Ｋ、交换性Ｃａ２＋、Ｍｇ２＋等７项指标均直接受影响。蓝桉人工林，经造林初期林地施肥能提高其生长量，但不能阻止林地土壤肥力下降。由于施肥促进了林木的生长，故也加强了对土壤肥力的消耗。
The study lasted for 4 years. The results showed that the establishment of a pure forest of Eucalyptus grandis could cause the soil fertility of the forestland to decrease obviously. Seven indicators of organic matter, total N, available N, P, K, exchangeable Ca2 + and Mg2 + were directly affected. Blue eucalyptus plantation, after the early stage of afforestation, woodland fertilization can increase its growth, but can not prevent the forest soil fertility decline. As fertilization promotes the growth of trees, it also increases the consumption of soil fertility.