乐昌含笑人工林培肥土壤与涵养水源功能分析

以杉木人工林为对照,采用标准地法分析了10年生乐昌含笑人工林土壤的理化性质、林下植被生物量及凋落物现存量、林分涵养水源的功能。发现乐昌含笑人工林表层土壤水稳性团聚体含量比杉木人工林增加3.80%,非毛管孔隙和总孔隙分别比杉木人工林高4.84%和7.46%,林地凋落物质量的(F+H)/L的比值为0.45,高于杉木纯林的0.21,乐昌含笑0～20 cm土层有机质、全N、全P分别比杉木纯林增加19.07%、13.67%和3.42%,水解性N、速效P、速效K分别增加3.64%、6.17%和11.01%,地上部分最大持水量达10.26 t/hm2,高于杉木人工林的9.02 t/hm2。

Soil fertility of Michelia chapensis plantation and its water conservation

Compared with the Chinese fir plantation,soil physicochemical property,vegetation biomass under the forest,litter biomass and function of forest water conservation in the ten-year-old Michelia chapensis plantations were analyzed.The results showed that the water stable aggregates content,non-capillary porosity and total porosity in the surface soil of M.chapensis plantations was 3.80%,4.84% and 7.46% higher than that in the Chinese fir plantation,respectively.The weight ratio of(F+H)/L in the forest litter ...