雷州半岛桉树人工林土壤肥力特征及其成因

Characteristics and Causes of Soil Fertility Under Eucalyptus Plantations in Leizhou Peninsula

对雷州林业局桉树人工林地进行了土壤普查,结果表明,桉树人工林土壤肥力很低;其现状肥力特征的形成与桉树人工林生态系统水土流失严重,人为因素对土壤养分生物积累过程的干扰,桉树全树利用方式,耕垦和采后剩余物处理不适当有关。因此,增加桉树人工林生物多样性、回归林地凋落物于土壤,应用适当地采伐利用方式和采伐剩余物的处理方式,是改善桉树人工林土壤肥力必须采取的措施。

<Abstrcat> The characteristics and causes of soil fertility under eucalyptus plantations on the Leizhou Peninsula are discussed. Investigation indicates that the soil fertility under this vegetation type is characterized by low soil organic matter content and soil nutrient impoverishment. Probable causes include severe soil and water loss, anthropogenic disturbance to the bioaccumulation process of nutrients, clear fallings practices, unsuitable land reclamation and residue management. Increasing the biodiversity characteristics of the eucalyptus plantations, returning litter to the forest floor, adopting sustainable harvesting techniques, as well as improved residue management are likely to improve the status of soil fertility.