闽南不同桉树种植区土壤肥力比较

Comparison on Soil Fertility of Eucalyptus spp. Plantations in Southern Fujian Province

为掌握闽南桉树主要种植区的土壤肥力状况,对其6个县市桉树人工林土壤理化性质进行分析,结果表明:闽南主要桉树种植区桉树人工林的土壤呈酸性,与全国土壤养分分级标准相比,林地土壤全N、全K和有机质含量中等,全P含量中等偏下,速效养分含量偏低,其中速效P缺乏最严重,可能成为桉树生长的主要限制因子。闽南主要桉树种植区林地土壤物理性质一般,土壤较为紧实,通气性和透水性较差。6个不同桉树种植区中,以长泰、南靖种植区林地的土壤肥力相对较好,云霄种植区林地土壤肥力较差。总体来说,闽南桉树种植区林地土壤肥力一般为Ⅲ～Ⅳ类地,处于中等偏下肥力水平,建议通过施肥补充林地养分。

In order to determine soil fertility in the main planting regions of Eucalyptus spp.,the physical and chemical properties of E.spp.plantation soil in six counties of the southern Fujian Province were analyzed.The results showed that the E.spp.plantation soil was acid in the major planting regions.According to the classification standard of soil nutrition in China,the contents of total N,total K and organic matter in the E.spp.plantation soil was at the medium level,the content of total P and the available nutrients were at low level,while the available P was in severe deficiency,which could be a limiting factor for the growth of Eucalyptus spp..The physical properties of the soil in the major E.spp.planting regions were at the average level,where the soil was rather compact with poor air ventilation and water permeability.Among the six counties in Southern Fujian Province,the soil fertility condition was relatively poor in Yunxiao County,and little better in Changtai County and Nanjing County.The mean fertility of E.spp.plantation soil in southern Fujian Province generally belonged to the medium to poor level,which should be ameliorated by artificial fertilization.