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林业资源管理 ›› 2022, Vol. 0 ›› Issue (1): 166-173.doi: 10.13466/j.cnki.lyzygl.2022.01.020

• 研究简报 • 上一篇    下一篇

广西壮族自治区4种典型灌丛凋落物层的水文效应

代奉林(), 陈芳清(), 吕坤, 刘杨赟   

  1. 三峡大学 湖北省三峡地区生态保护与治理国际联合研究中心 湖北 宜昌 443000
  • 收稿日期:2021-12-27 修回日期:2022-01-07 出版日期:2022-02-28 发布日期:2022-03-31
  • 通讯作者: 陈芳清
  • 作者简介:代奉林 (1996-),女,重庆奉节人,硕士,主要从事保护生态学和恢复生态学等方面的研究工作。Email: 1032098356@qq.com
  • 基金资助:
    科技部科技基础性工作专项(2015FY1103002-5)

Hydrological Effects of Litter Layer in Four Typical Shrubs in Guangxi Zhuang Autonomous Region

DAI Fenglin(), CHEN Fangqing(), LV Kun, LIU Yangyun   

  1. Hubei International Scientific and Technological Cooperation Center of Ecological Conservation and Management in the Three Gorges Area,Yichang,Hubei 443000,China
  • Received:2021-12-27 Revised:2022-01-07 Online:2022-02-28 Published:2022-03-31
  • Contact: CHEN Fangqing

摘要:

灌丛凋落物层在水土保持中具有重要的作用,为了探寻不同灌丛水文效应的差异,利用样方法采集了广西壮族自治区所分布的红背山麻杆、牡荆、杜茎山和羊蹄甲等4种典型灌木群落凋落物层的凋落物,通过测定凋落物的蓄积量、持水率和拦蓄量等参数,对灌丛凋落物层的水土保持效应及其机理进行了研究。结果显示,4种灌丛凋落物总蓄积量在3.80~4.84 t/hm2之间,以红背山麻杆灌丛的蓄积量为最大;4种灌丛凋落物层的自然含水率和最大持水率的差异显著,羊蹄甲灌丛显著高于其它3种灌丛类型;4种灌丛凋落物的有效拦蓄总量在5.32~7.28 t/hm2范围内。各灌丛类型有效拦蓄总量排序依次为红背山麻杆>牡荆>羊蹄甲>杜茎山,红背山麻杆灌丛凋落物层有效拦蓄总量分别比牡荆、羊蹄甲和杜茎山灌丛高11.15%,35.06%和36.84%。研究表明,4种灌丛凋落物层的水文效应以红背山麻杆灌丛和羊蹄甲灌丛较优。

关键词: 凋落物, 持水, 水分拦截, 灌丛, 广西壮族自治区

Abstract:

Litter layer in shrub communities plays an important role in soil and water conservation.In order to explore the differences in hydrological effects of different shrubs,litters were sampled from community under storey of four typical shrubs distributed in Guangxi Zhuang Autonomous Region in cluding Alchornea trewioides,Vitex negundo,Maesa japonica and Bauhinia purpurea communities. The water and soil conservation effect of the litter layer and its mechanism were revealed by measuring parameters such as litter volume,water holding rate and water in terception volume.The total litter accumulation ranged from 3.80 t/hm 2 to 4.84 t/hm2 in the four shrubs.The largest accumulation appeared in the A.trewioides community. There were significant differences among the four shrubs in the natural moisture content and the maximum water holding rate of the litter layer,which of B. purpurea community were significantly higher than the other three shrubs. The total effective in terception of litter in the four shrubs ranged from 5.3 t/hm 2 to 7.28 t/hm2.The order of the total effective interception of each community type was as follows:A. trewioides>V.negundo>B. purpurea> M.japonica. The total effective interception of the A. trewioides community was 11.15%,35.06% and 36.84% higher than that of V. negundo,B. purpurea and M. japonica community,respectively.The litter layer of A. trewioides and B. purpurea community had better hydrological effects in the four typical shrubs.

Key words: litter, water holding capacity, water interception, shrub, Guangxi Zhuang Autonomous Region

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