杉木连栽地营造米老排林后的土壤物理性质  

Soil Physical Properties of Mytilaria laosensis Plantation Planted on Site of Continuous Chinese fir (Cunninghamia lanceolata) Monoculture

作　　者：张红梅 Zhang Hongmei(Hulushan State Forest Farm,Nanping,Fujian 353009,China)

机构地区：[1]福建省南平葫芦山国有林场,福建南平353015

出　　处：《绿色科技》2022年第17期90-94,共5页Journal of Green Science and Technology

摘　　要：采用环刀法采集土壤样品进行容重、孔隙度、持水性能和渗透性能测定,研究了福建省南平市延平区杉木2代采伐迹地营造的29年生米老排人工林及其临近的杉木人工林土壤物理性质,以期为本地区人工林的科学经营奠定理论基础。结果表明:米老排人工林各层次土壤容重均低于杉木人工林,而总孔隙度、非毛管孔隙度、通气度、最大持水量、排水能力和渗滤系数均高于杉木人工林。米老排和杉木人工林土壤物理性质的差异主要体现在表层(0~10 cm)土壤。米老排人工林表层土壤容重为0.893 g/cm^(3),比杉木人工林降低了5.80%;表层土壤总孔隙度、非毛管孔隙度、通气度、最大持水量、排水能力、渗滤系数分别为63.50%、19.77%、29.37%、71.23%、36.91 mm、11.79 mm/min,分别是杉木人工林的1.056倍、1.509倍、1.055倍、1.119倍、1.196倍、1.322倍。米老排人工林表层土壤的排水能力、表层和10~20 cm土层土壤渗滤系数显著高于杉木林(P<0.05),但其余物理性质的差异未达显著水平(P>0.05)。杉木连栽地营造米老排人工林可改善土壤物理性质和水源涵养能力。The soil samples were collected by the volumetric ring method for the determination of soil bulk density, porosity, water holding capacity and permeability. The soil physical properties of a 29-year-old Mytilaria laosensis plantation and its neighboring Chinese fir(Cunninghamia lanceolata) plantation in Yanping District, Nanping City, Fujian Province was studied in order to lay a theoretical foundation for the scientific management of plantation forests in the region. The soil bulk density of M. laosensis plantation at all soil depth was lower than that of Chinese fir plantation, while the total porosity, non-capillary porosity, aeration, maximum water holding capacity, drainage capacity and infiltration coefficient were higher than those of Chinese fir plantation. The difference in soil physical properties between M. laosensis and Chinese fir plantation is mainly reflected in the surface layer(0~10 cm). The surface soil bulk density of M. laosensis plantation is 0.893 g/cm^(3), which is 5.80% lower than that of Chinese fir plantation. The total porosity, non-capillary porosity, aeration, maximum water holding capacity, drainage capacity, and infiltration coefficient of the soil in the surface layer of M. laosensis plantation were 63.50%, 19.77%, 29.37%, 71.23%, 36.91 mm, and 11.79 mm/min, respectively, which were 1.056 times, 1.509 times, 1.055 times, 1.119 times, 1.196 times, and 1.322 times that of Chinese fir plantations, respectively. The drainage capacity of the top soil and the soil infiltration coefficient of the top and 10~20 cm soil layers in the M. laosensis plantation were significantly higher than those in the Chinese fir plantation(P<0.05), but the differences in other physical properties were not significant(P>0.05). Planting M. laosensis on site of continuous Chinese fir monoculture can improve soil physical properties and water conservation capacity.

关 键 词：杉木 米老排 土壤物理性质 

分 类 号：S714.2[农业科学—林学]