Zhang Yue, Ma Lan, He Jiao, Dang Cai-Yu, Zou Chun-Lei, Cui Yong-Sheng
School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China.
Jixian National Forest Ecosystem Observation and Research Station, National Ecosystem Research Network of China, Beijing Forestry University, Beijing 100083, China.
Ying Yong Sheng Tai Xue Bao. 2023 Dec;34(12):3177-3183. doi: 10.13287/j.1001-9332.202312.023.
It is of great significance to investigate the volume and water holding characteristics of litters for the accurate evaluation of forest water conservation function. With , , and as the research objects in the Loess Plateau of Western Shanxi Province, we analyzed the thickness of undecomposed layer and semi-decomposed layer, the volume of litter, and the relationship between the litter water-holding characteristics and the immersion time for different stands by the combination of sample survey and indoor immersion test. The results showed that the total thickness of litter layer was 4.06-5.12 cm, with the thickest layer in forest and the thinnest in forest. The storage volume of litter was the largest in (24.39 t·hm), followed by (23.64 t·hm), (22.51 t·hm), and (22.48 t·hm), and the smallest in (20.42 t·hm). The volume in the undecomposed layer was less than that in the semi-decomposed layer. The maximum water holding of litter was 40.41-79.56 t·hm, with the highest of and the lowest of . The effective interception rate of litter was 108%-188%. The changes of water capacity and water absorption rate of litter were most rapid in and , and the changes were faster in the semi-decomposed layer than in the undecomposed layer. The water-holding capacity of litter in five forests was following an order of
研究凋落物的蓄积量和持水特性对于准确评价森林的水源涵养功能具有重要意义。以晋西黄土高原的[具体森林类型1]、[具体森林类型2]、[具体森林类型3]和[具体森林类型4]为研究对象，通过样地调查与室内浸泡试验相结合的方法，分析了不同林分未分解层和半分解层的厚度、凋落物蓄积量以及凋落物持水特性与浸泡时间的关系。结果表明，凋落物层总厚度为4.06 - 5.12厘米，其中[森林类型1]的凋落物层最厚，[森林类型4]的最薄。凋落物蓄积量以[森林类型2]最大（24.39吨·公顷），其次为[森林类型3]（23.64吨·公顷）、[森林类型1]（22.51吨·公顷）、[森林类型4]（22.48吨·公顷），最小的是[森林类型5]（20.42吨·公顷）。未分解层的蓄积量小于半分解层。凋落物最大持水量为40.41 - 79.56吨·公顷，其中[森林类型1]最高，[森林类型4]最低。凋落物的有效截留率为108% - 188%。[森林类型1]和[森林类型2]中凋落物持水量和吸水率变化最为迅速，且半分解层的变化比未分解层更快。5种森林凋落物的持水能力排序为…… （注：原文中部分森林类型未给出具体名称，用[具体森林类型X]表示）
