生态学杂志2025，Vol.44Issue(2)：389-395,7.DOI:10.13292/j.1000-4890.202502.027
桂北地区不同林龄杉木人工林优先流的变异特征
Variations of preferential flow across different aged Chinese fir plantations in northern Guangxi
摘要
Abstract
Preferential flow,a critical component of soil infiltration,affects water conservation capability of forest plantations,and threatens groundwater quality by facilitating the rapid downward migration of soil pollutants genera-ted by forestry practices.Therefore,understanding the developmental characteristics of preferential flow during the rotation period of plantations can provide a scientific basis for their sustainable management.We investigated prefer-ential flow characteristics during the rotation period of Chinese fir plantations in the Beijiang River Forest Farm in Rongshui,Guangxi,using methylene blue dye tracing.A multi-index evaluation method was employed to assess the relative development degree of preferential flow in Chinese fir plantations of different ages.The results showed that soil dyeing in Chinese fir plantations decreased with increasing soil depth,with the main infiltration area being 0-20 cm.The lateral preferential flow was the dominant infiltration mode of the soil infiltration process,which occurred at the beginning of infiltration.The preferential flow indicators for different aged Chinese fir plantations were in the order of 5-year-old(0.64)＞8-year-old(0.59)＞11-year-old(0.47)＞15-year-old(0.39).Our results indicated that lateral preferential flow predominates in the infiltration process of Chinese fir plantations,and that the degree of preferential flow development decreases with increasing forest age.The findings can provide a the-oretical basis for the formulation of scientific forest management measures in Chinese fir plantations,and thereby can promote the sustainable management of plantations.关键词
人工林/优先流/染色示踪/多指标评价Key words
forest plantation/preferential flow/dye tracing/multi-index evaluation引用本文复制引用
邓莹莹,廖煜亮,容清标,杨梦格,谭青芳,赵明全,潘天森,黄钰涵..桂北地区不同林龄杉木人工林优先流的变异特征[J].生态学杂志,2025,44(2):389-395,7.基金项目
广西科技基地和人才专项(桂科AD22035032)、广西重点研发计划项目(桂科AB22080103)和广西自然科学基金项目(2021GXNSFBA196020)资助. （桂科AD22035032）
