森林与环境学报2024，Vol.44Issue(3)：233-241,9.DOI:10.13324/j.cnki.jfcf.2024.03.002
琼西北3种林分类型枯落物与土壤的持水能力
Water-holding capacity of litter and soil in three types of forest in northwest Hainan,China
摘要
Abstract
The water-holding capacity of litter and soil was measured in three different forest types(Eucalyptus robusta,Hevea brasiliensis,and Acacia mangium plantations)in the Mahuangling watershed in the north-west of Hainan,China,to provide a reference for the construction of local soil and water conservation forests.The hydrological functions of litter and soil were determined quantitatively using immersion and cutting-ring methods,and the water conservation capacity of each forest type was analyzed using the entropy weight method(EWM).The results showed that:the litter total storage in the three forest types was about 3.01～14.66 t·hm-2,in the order,A.mangium plantation>H.brasiliensis plantation>E.robusta plantation,the storage of semi-decomposed litter was higher than that of undecomposed litter,which was 75.09%～81.86%of the total storage;the maximum water holding capacity and the effective water interception capacity of litter were 8.60～33.95 t·hm-2and 6.92～26.73 t·hm-2,respectively,in the order,A.mangium plantation>E.robusta plantation>H.brasiliensis plantation.The water-holding capacity had a logarithmic relationship with soaking time(R2>0.940);whereas the water-absorption rate had a power function relationship with soaking time(R2>0.880).The average soil bulk density ranged from 1.45 g·cm-3 to 1.52 g·cm-3,with total porosity ranging from 32.82%～37.56%,the effective water holding capacity of soil was 61.80～77.16 t·hm-2,in the order,A.mangium plantation>E.robusta plantation>H.brasiliensis plantation.The initial soil water infiltration rate was 24.74～29.67 mm·min-1,with the highest observed in A.mangium plantation,the stable soil water infiltration rate was 1.01～1.38 mm·min-1,a power function relationship was observed between the infiltration rate and infiltration time(R2>0.920).The evaluation of the water conservation capacity indicated that soil water infiltration capacity and total litter storage were the main factors,in the order,A.mangium plantation(81.098 7)>E.robusta plantation(69.741 6)>H.brasiliensis plantation(67.151 4).Considering the hydrological effects of the litter and soil in the three forest types,the water conservation abilities of the A.mangium plantation were higher than those of other vegetation types.This suggests that the E.robusta and H.brasiliensis plantations should be transformed into mixed forests by planting A.mangium to increase their soil and water conservation capacities.关键词
桉树/橡胶树/马占相思/水土流失区/枯落物/土壤/持水能力Key words
Eucalyptus robusta/Hevea brasiliensis/Acacia mangium/water and soil loss/litter/soil/water-holding capacity分类
农业科技引用本文复制引用
陈夙怡,黄艳萍,严美,韩宇杰,王康,涂志华..琼西北3种林分类型枯落物与土壤的持水能力[J].森林与环境学报,2024,44(3):233-241,9.基金项目
海南省自然科学基金项目"海南典型水土流失区植被恢复措施林分结构与水土保持功能耦合机制研究"(420RC532) （420RC532）
国家自然科学基金项目"砖红壤侵蚀区植被恢复演替过程中根际激发效应及微生物驱动机制"(42267048). （42267048）
