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通过对南平次生林地、杂草丛、坡耕地不同植被类型表土调查和采样,利用LuoPacias孢粉鉴定系统对所采的表土样品进行分析鉴定,以研究该区表土的孢粉组合特征。结果显示:(1)样品植物孢粉共由123种植物组成,其中以草本和蕨类植物占据优势,其孢粉含量为46.40%~76.47%,平均为65.55%,其次是乔木(主要为马尾松),花粉含量为17.73%~46.84%,平均为26.40%,灌木植物花粉含量最小,为5.79%~12.50%,平均为8.26%,显示该区植被退化严重;(2)不同植被类型的表土孢粉组合差别明显,次生马尾松林和次生樟树林的孢粉组合特征依次为马尾松—火棘—大楼梯草—里白和樟树—火棘—构棘—泽芹;杂草丛为裂叶荨麻—圆叶藜—车前子—里白;坡耕地为异叶花椒—裂叶荨麻—剑叶凤尾蕨—玉米,与其相应的实际植被情况大致相同,较好地反映出了石漠化地区现代植被的基本状况。
Through the investigation and sampling of topsoil of different vegetation types in Nanping secondary forest, weeds and slope farmland, the surface soil samples collected from LuoPacias were analyzed and identified to study the characteristics of spore-pollen assemblages. The results showed that: (1) There were 123 species of sporopollen in plant samples, among which herbaceous and fern dominated. The sporopollen content was 46.40% -76.47% with an average of 65.55%, followed by arbor (mainly mawei The pollen content was from 17.73% to 46.84% with an average of 26.40%. The pollen content of shrubs was the lowest, ranging from 5.79% to 12.50% with an average of 8.26%, indicating that the vegetation degenerated seriously. (2) The topsoil with different vegetation types The differences of sporopollen assemblages were obvious. The sporopollen assemblage characteristics of the secondary Pinus massoniana and the secondary camphor trees were, in order, Masson pine - Pyracantha - large stairweed - Lilium and camphor - pyracantha - Spinachophyton - parsley; Leaf nettle - leaf Chenopodiaceae - Plantago - in white; slope cultivated land for the different leaf pepper - cracked nettle - sword leaves Pteridophyta - corn, and its corresponding actual vegetation roughly the same situation, a good reflection of The Basic Situation of Modern Vegetation in Rocky Desertification Areas.