上阔下竹混交林对土壤物理性质的影响

1.南京林业大学 竹类研究所,江苏南京 210037; 2.遂川县林业局衙前林业站,江西遂川343903

上阔下竹混交林;土壤物理性质;TOPSIS 优劣解距离法

Effects of Phyllostachys edulis and broad-leaved mixed forest on soil physical properties
XU Ai-zhen1, YANG Kuan1, WANG Fu-sheng1, LIU Guo-hua1, LIU Xin-hua2

1.Institute of Bamboo, Nanjing Forest University, Nanjing 210037, Jiangsu, China;2. Yaqian Forest Station of Suichuan County, Suichuan 343903, Jiangxi, China

Phyllostachys edulis and broad-leaved mixed forest; soil physical property; TOPSIS method

备注

以遂川县不同比例的上阔下竹混交林Ⅰ (18.6%)、Ⅱ(25%)、Ⅲ(27.5%)和毛竹纯林(Ⅳ)为研究对象,对不同深度(0 ~ 60 cm)的土壤物理性质分析。结果 表明:土壤容重的排列顺序为Ⅳ (1.04 g·cm-3) <Ⅲ (1.11g·cm-3) <Ⅱ (1.12 g·cm-3) <Ⅰ (1.13 g·cm-3),且差异显著;土壤总孔隙度大小为Ⅳ>Ⅲ>Ⅰ>Ⅱ;土壤有机质由大到小依次为Ⅲ>Ⅰ>Ⅱ>Ⅳ,土壤有机质与土壤容重存在显著负相关,与土壤总孔隙度、毛管孔隙度、非毛管孔隙度等存在显著或极显著关系;土壤最大蓄水量和蓄水深度均表现为Ⅳ>Ⅲ>Ⅱ>Ⅰ。采用TOPSIS 法对不同类型毛竹林土壤物理结构综合评价,土壤物理结构优劣顺序为Ⅲ>Ⅳ>Ⅱ>Ⅰ,表明较大比例的上位阔叶林对下位毛竹纯林土壤结构有一定的改善作用。

By taking the different proportions moso bamboo and broad-leaved mixed forests [ Ⅰ (18.6%), Ⅱ (25%), Ⅲ (27.5%)] andmoso bamboo pure forest ( Ⅳ ) in Suichuan county as studying objectives, the soil physical properties of the forests in different depths (0~ 60 cm) have been analyzed. The results indicate that the order of soil bulk density from large to small was plot Ⅳ (1.04 g·cm-3) < plotⅢ (1.11g·cm-3) < plot Ⅱ (1.12g·cm-3) <Ⅰ (1.13g·cm-3), of them there were significant differences; the soil total porosity sequenced bymagnitude plot Ⅳ > Ⅲ > Ⅰ > Ⅱ ; the order of soil organic matter order was plot Ⅲ > Ⅰ > Ⅱ > Ⅳ , which was negatively correlatedwith soil bulk density, but significantly or highly significant correlated with soil total porosity, capillary porosity and non-capillaryporosity et al; the soil maximum water volume and water depth were in the order plot Ⅳ > Ⅲ > Ⅱ >I. Evaluating with the method ofTOPSIS, the advantages and disadvantages of the soil physical structure in different types of moso bamboo forests ranked in magnitudeorder plot Ⅲ > Ⅳ > Ⅱ >I, which show that the upper broad-leaves forests with a significant proportion had some improvements on thesoil structure of the lower moso bamboo pure forest.