南亚热带喀斯特区原生林和次生林凋落物与土壤水文效应  

Study on the Effects of Litter and Soil Hydrology of Karst Forests in the South Subtropical Region

作　　者：庞庆玲 韦慧丝 黄侩侩 张贝 何业涌 胡刚 

机构地区：[1]南宁师范大学地理科学与规划学院,广西 南宁 [2]南宁师范大学环境与生命科学学院,广西 南宁

出　　处：《地理科学研究》2023年第1期52-60,共9页Geographical Science Research

摘　　要：本文以广西三十六弄-陇均省级自然保护区原生林和次生林为研究对象,通过野外调查和室内浸泡,探讨原生林和次生林凋落物层和土壤层水文效应。结果表明1) 凋落物厚度和蓄积量均呈原生林 > 次生林,原生林凋落物厚度和蓄积量分别为22.65 mm和7.35 t∙hm−2,次生林分别为19.51 mm和6.45 t∙hm−2。2) 凋落物最大持水量和有效拦蓄量均表现为原生林 > 次生林。3) 凋落物吸水速率和浸水时间的关系均符合幂函数关系(R²> 0.958, P 0.913, P 次生林。5) 原生林林地有效持水量为119.61 t∙hm−2,大于次生林105.01 t∙hm−2,原生林持水性能较好。综上,石灰岩常绿落叶阔叶混交林具有较强的水源涵养能力,且原生林优于次生林。This research took the primary forest and secondary forest in Guangxi 36 Lane-Longjun Provincial Nature Reserve as the research object, studying the hydrological effects of litter layer and soil layer based on field investigation and indoor immersion methods. The results showed that: 1) The litter thickness and the biomass storage showed primary forest > secondary forest, the litter thickness and biomass storage of primary forest were 22.65mm and 7.35 t∙hm−2, and secondary forest were 19.51 mm and 6.45 t∙hm−2, respectively. 2) The maximum water-holding capacity and modified interception amount exhibited primary forest > secondary forest. 3) Litter absorption rate and soaking time was power function relationship (R²> 0.958, P 0.913, P secondary forest. 5) The effective water-holding capacity of primary forest was 119.61 t∙hm−2, which was greater than that of 105.01 t∙hm−2 in secondary forest, indicating that the water-holding capacity of primary forest was relatively good. In conclusion, the Karst mixed evergreen-deciduous broadleaf forest has a strong water conservation capacity, and the primary forest is better than the secondary forest.

关 键 词：喀斯特 凋落物层 土壤层 水源涵养 

分 类 号：S71[农业科学—林学]