西南林业大学学报2025，Vol.45Issue(5)：141-149,9.DOI:10.11929/j.swfu.202407021
间伐保留密度对杉木人工林凋落物与土壤持水特性的影响
Effects of Thinning Retention Density on Litter and Soil Water Retention Characteristics of Cunninghamia lanceolata Plantation
摘要
Abstract
Taking Cunninghamia lanceolata plantation with 11-year thinning retention density of 1200,1 800 and 2 500 trees/hm2 in northern Guangdong as the research object,the differences of litter and soil water retention characteristics of different C.lanceolata plantation after thinning for 2 years and the influencing factors were ana-lyzed,and the water retention performance of stands with different thinning retention density was explored.The results show that higher retention density was conducive to litter accumulation,and the litter inventory and thick-ness of 2500 trees/hm2 C.lanceolata forest increased by 7.96％-30.87％and 4.90％-24.92％compared with the other 2 density stands.The soil maximum water holding capacity and effective storage capacity of 1 800 trees/hm2 stands were the largest in different retention densities of C.lanceolata forests,and were signific-antly greater than 1200 trees/hm2 stands.The soil saturation water holding capacity and capillary water holding capacity of 1 800 trees/hm2 stands were the largest in the 3 kinds of preserved density C.lanceolata forests,which increased by 6.5％to 24.95％compared with the other 2 kinds of preserved density stands.The soil non-capillary water capacity increased with the increase of retention density,which was 2 500 trees/hm2(45.50 t/hm2)＞1 800 trees/hm2(32.21 t/hm2)＞1200 trees/hm2(23.76 t/hm2).The results of correlation analysis showed that litter water capa-city was significantly correlated with litter thickness and existing stock,soil pH value,organic carbon content,non-capillary porosity,and non-capillary water capacity.The soil moisture content was significantly correlated with total porosity,capillary porosity,and non-capillary porosity,soil bulk density,soil organic matter content,canopy density and leaf area index.The results of coordinate comprehensive evaluation showed that the compre-hensive water holding capacity of litter and soil was 1 800 trees/hm2＞2 500 trees/hm2＞1200 trees/hm2 in the stands with different retention densities.In conclusion,1 800 trees/hm2 stands had the best litter and soil water re-tention capacity among the 3 different retention density stands.关键词
间伐/保留密度/凋落物/土壤/杉木/人工林/持水特性Key words
thinning/retention density/litter/soil/Cunninghamia lanceolata/plantation/water retention characteristic分类
农业科技引用本文复制引用
卢德浩,冯铭淳,邱展鹏,黄焕强,陈世清,林娜..间伐保留密度对杉木人工林凋落物与土壤持水特性的影响[J].西南林业大学学报,2025,45(5):141-149,9.基金项目
广东省自然科学基金项目(2021A1515011092)资助 （2021A1515011092）
广东省林业科技创新项目(2023KJCX001)资助. （2023KJCX001）
