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为了改良连栽桉树人工林土壤养分循环,促进桉树人工林的可持续经营,在广泛查阅相关研究文献的基础上,综合分析了桉树不同连栽代次对不同土层土壤有机质、氮、磷、钾含量的影响,并进行连栽桉树人工林与其它林对土壤养分影响的对比。结果表明,桉树连栽会导致土壤有机质明显下降,特别是表层有机质,且会造成土壤氮、磷、钾含量下降,土壤表层钾含量和中下层全氮含量下降趋势较为明显。保持自肥+科学施肥+施用菌肥,改变耕作制度,发展复合经营,优化林分结构,降低养分移出强度,这些措施都能有效提高连栽桉树人工林土壤养分含量,改良土壤养分循环。
In order to improve the soil nutrient cycling in Eucalyptus plantations and to promote the sustainable management of Eucalyptus plantation, based on a comprehensive review of relevant research literature, the effects of different successive planting generations of Eucalyptus on soil organic matter, nitrogen, phosphorus, Potassium content of the impact of continuous planting eucalyptus plantations and other forest nutrient effects on soil nutrients. The results showed that Eucalyptus continuous planting would lead to a significant decline in soil organic matter, especially the surface organic matter, which would result in the decrease of soil N, P and K contents and the decrease of surface K and N contents. Maintaining self-fertilization, scientific fertilization and application of bacteriostat, changing farming system, developing composite management, optimizing stand structure and decreasing nutrient removal intensity can effectively improve soil nutrient content of Eucalyptus plantation and improve soil nutrient cycling.