前言桉树林地地力下降已是常听到的话题。据雷州林业局林科所1979年取样分析,桉树林地与非林荒地土壤比较,五十厘米深度内根系主要活动层的土壤肥力,有机质含量下降46.5%;全氮下降79.9%;速效钾下降46.7%。广西合浦林科所凌昌发的调查分析, Preface Eucalyptus woodland landfall is often heard the topic. According to the sampling and analysis conducted by Forest Bureau of Leizhou Forestry Bureau in 1979, the soil fertility and organic matter content of main active layer in the root system at the depth of 50 cm decreased by 46.5%, the total nitrogen decreased by 79.9% and the available potassium decreased by 46.7% compared with the non-abandoned land. %. Guangxi Hepu Linke Lingchang hair investigation and analysis,