永嘉县四海山林场森林枯落物及土壤持水能力研究

Study on Water Holding Capacity of Forest Litter and Soil in Sihaishan Forest Farm of Yongjia County

为掌握永嘉县四海山林场不同森林枯落物和土壤的持水能力,采用野外调查和室内浸泡法,对该林场4种主要森林类型的枯落物及林下土壤持水性进行了研究,并对林地水源涵养功能进行了估算,结果表明:森林枯落物总储量大小为马尾松林>柳杉林>针叶混交林>针阔混交林,枯落物有效拦蓄量大小表现为柳杉林>马尾松林>针叶混交林>针阔混交林;柳杉林和针阔混交林0~10 cm土层土壤非毛管孔隙度、非毛管持水量显著高于马尾松林和针叶混交林;森林水源涵养能力大小表现为针阔混交林>柳杉林>针叶混交林>马尾松林;四海山林场林地水源涵养总量为7 530 343.4 t,经济价值量为6 174.8万元。

In order to know well the water holding capacity of different forest litters and soils in Sihaishan forest farm of Yongjia County,the paper studied the water holding capacity of litter and soil under four main forest types of the farm and estimated the water conservation function of forest land by using the methods of field survey and indoor soaking extraction. The outcomes show that a) the total amount of forest litter is Pinus massoniana forest > Cryptomeria japonica var. Sinensis forest > coniferous mixed forest > coniferous and broad-leaved mixed forest. The effective storage capacity of litter is Cryptomeria japonica var. Sinensis forest > Pinus massoniana forest > coniferous mixed forest > coniferous and broad-leaved mixed forest;b) the soil non-capillary porosity and non-capillary water capacity of Cryptomeria japonica var. Sinensis forest and coniferous and broad-leaved mixed forest at 0-10 cm layer are obviously higher than that of Pinus massoniana forest and coniferous mixed forest;c) the order of water holding capacity is coniferous and broadleaved mixed forest > Cryptomeria japonica var. Sinensis forest > coniferous mixed forest > Pinus massoniana forest and;d) the total amount of water conservation of the forest land is 7 530 343.4 t and the economic value is 61.748 million Yuan.