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南亚热带5种典型人工林凋落物水文效应
引用本文:王金悦,邓羽松,林立文,黄娟,蒋代华,黄智刚.南亚热带5种典型人工林凋落物水文效应[J].水土保持学报,2020,34(5):169-175.
作者姓名:王金悦  邓羽松  林立文  黄娟  蒋代华  黄智刚
作者单位:1. 广西大学林学院, 南宁 530004;2. 广西大学农学院, 南宁 530004;3. 中国农业科学院农业环境与可持续发展研究所, 北京 100081
基金项目:广西科技重大专项(AA17204078-4);广西自然科学基金项目(2016JJA130212);国家重点研发计划项目(2017YFC0505402)
摘    要:以广西国有高峰林场的5种不同人工林(马尾松林、杉木林、桉树林、米老排林、红锥林)为研究对象,结合野外调查和室内浸水法,对各人工林凋落物层的水文效应进行定量分析。结果表明:(1)5种林分凋落物蓄积量范围在1.96~9.05 t/hm~2,大小顺序为红锥林杉木林马尾松林桉树林米老排林。(2)5种林分凋落物中,杉木林最大持水量最大,为14.23 t/hm~2,马尾松林最小,为6.26 t/hm~2;米老排林凋落物最大持水率最大,为577.98%,红锥林最小,为135.46%。(3)杉木林凋落物的有效拦蓄量最大,为10.18 t/hm~2,马尾松林最小,为4.07 t/hm~2;米老排林凋落物有效拦蓄率最大,为463.35%,红锥林最小,为92.38%。(4)回归分析表明,凋落物持水量与浸水时间的关系符合对数函数关系(Q=aln t+b(R~20.773)),凋落物吸水速率和浸水时间的关系符合幂函数关系(V=kt~n(R~20.997))。持水过程中,各林分凋落物均表现为在1 h内持水量迅速增加,1 h后增加速度变慢,在10~12 h之后,吸水基本停止。综上,杉木林、米老排林凋落物层水源涵养功能较强。

关 键 词:人工林  凋落物  水文效应  南亚热带
收稿时间:2020/3/8 0:00:00

Study on the Hydrological Effects of the Litters Layer from Five Typical Plantations in South Subtropics of China
WANG Jinyue,DENG Yusong,LIN Liwen,HUANG Juan,JIANG Daihu,HUANG Zhigang.Study on the Hydrological Effects of the Litters Layer from Five Typical Plantations in South Subtropics of China[J].Journal of Soil and Water Conservation,2020,34(5):169-175.
Authors:WANG Jinyue  DENG Yusong  LIN Liwen  HUANG Juan  JIANG Daihu  HUANG Zhigang
Institution:1. College of Forestry Guangxi University, Nanning 530004;2. College of Agricultural Guangxi University, Nanning 530004;3. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081
Abstract:Taking five kinds of plantations (Pinus massoniana forest, Cunninghamia lanceolata forest, Eucalyptus urophylla×E. grandis forest, Mytilaria laosensis forest and Castanopsis hystrix forest) in Nanning State-owned Gaofeng Forest Farm of Guangxi as research objects, using field investigation and indoor soaking method, the hydrological effects of the litter layers were quantitatively compared and studied. The results showed as the following: (1) The litter accumulations of five kinds of plantations was about 1.96~9.05 t/hm2, and the order of litter accumulation was Castanopsis hystrix forest > Cunninghamia lanceolata forest > Pinus massoniana forest > Eucalyptus urophylla×E. grandis forest > Mytilaria laosensis forest. (2) Among the five stand litters, the Cunninghamia lanceolata forest had the largest maximum water-holding capacity (14.23 t/hm2), and the Pinus massoniana forest had the smallest maximum water-holding capacity (6.26 t/hm2). The maximum water-holding rate of litter in Mytilaria laosensis forest was the largest(577.98%), with that in Castanopsis hystrix forest was the smallest(135.46%). (3) The effective water storage capacity of litters in Cunninghamia lanceolata forest was the largest (10.18 t/hm2), while that in Pinus massoniana forest was the smallest (4.07 t/hm2). The most effective interception rate of litter was 436.35% in the Mytilaria laosensis forest and the smallest was 92.38% in the Castanopsis hystrix forest. (4) The regression analysis showed that the relationship between the water-holding capacity of litters and the soaking time conformed to the logarithmic function (Q=aln t+b(R2>0.773)), and the relationship between litter water absorption rate and soaking time conformed to the power function (V=ktn(R2>0.997)). In the water-holding process, the litters in all stands showed that the water-holding capacity increased rapidly with in 1 hour, and the increasing speed slowed down after 1 hour. After 10~12 hours, the litter basically stopped absorbing water. In conclusion, the litters layer of Cunninghamia lanceolata forest and Mytilaria laosensis forest had strong water conservation function.
Keywords:plantations  litter  hydrological effects  south subtropics
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