中文摘要：

经济林作为一种重要的林分类型,对于促进林业产业发展和林农增收具有重要作用。为了了解经济林地的土壤肥力状况,以促进经济林的高产稳产和可持续经营,选取广东省内三种典型的经济林（包括板栗林、油茶林、笋用麻竹林）,对此三种经济林地的土壤孔隙性、持水量等物理性质及氮、磷、钾等养分含量和储量进行了测定与分析。测定结果表明：板栗林地的土壤容重较大,其孔隙度为40.30%-55.99%,田间持水量在208.37-241.29 g·kg^-1之间,土壤中的有机质、氮素含量偏低,磷和钾极度缺乏,0-60 cm土层中的有机碳和氮、磷、钾储量分别为70.50与11.25、2.70、113.48 t·hm^-2;油茶林地的土壤容重较小,其土壤孔隙度为49.73%-53.58%,田间持水量在313.90-397.61 g·kg^-1之间,土壤中的氮和钾元素含量偏低,磷元素极度缺乏,0-60 cm土层中的有机碳和氮、磷、钾储量分别为40.91与7.13、1.94、84.97 t·hm^-2;笋用竹林地的土壤容重不大,其土壤孔隙度为46.70%-48.16%,田间持水量在269.11-297.85 g·kg^-1之间,土壤中的氮素含量丰富,而钾素含量很低,磷元素较为缺乏,0-60 cm土层中的有机碳和氮、磷、钾储量分别为69.54与12.68、2.93、83.18 t·hm^-2。分析结果表明：三种经济林地土壤中的磷与钾元素均缺乏,施肥时应注重磷钾肥的施用。

英文摘要：

As a kind of important forest type, non-timber forest plays an important role in promoting development of forestry industry and increasing farmers＇ income. In order to understand soil fertility and promote stable high yield and sustainable management of non-wood forest, three typical non-wood plantations（including Castanea mollissima, Camellia oleifera and Dendrocalamus laliflorus plantations） in Guangdong Province were studied, some physical properties（soil porosity, water-holding capacity, and so on）, contents and serves of N, P and K. The results show that in C. mollissima plantation, the soil bulk density is higher, the soil porosity is between 40.30% and 55.99%, the water-holding capacity is between 208.37 and 241.29 g·kg^-1; the contents of organic matter and N are lower, P and K elements are severely deficient, and the reserves of organic carbon, N, P and K in 0-60 cm soil layer are 70.50, 11.25, 2.70 and 113.48 t·hm^-2, respectively. In C. oleifera plantation, the soil bulk density is lower, the soil porosity is between 49.73% and 53.58%, the water-holding capacity is between 313.90 and 397.61 g·kg^-1; the contents of N and K are lower, P element is severely deficient, and the reserves of organic carbon, N, P and K in 0-60 cm soil layer are 40.91, 7.13, 1.94 and 84.97 t·hm^-2, respectively. In D. lalifl orus plantation, the soil bulk density is lower, the soil porosity is between 46.70% and 48.16%, and the water-holding capacity is between 269.11 and 297.85 g·kg^-1; N content is rich, K content is lower, P element is extremely deficient, and the reserves of organic carbon, N, P and K in 0-60 cm soil layer are 69.54, 12.68, 2.93 and 83.18 t·hm^-2, respectively. Both P and K are deficient in soils of the three non-wood plantations, and P and Kfertilizers should be applied to the studied plantations.