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林业资源管理 ›› 2018›› Issue (1): 44-49.doi: 10.13466/j.cnki.lyzygl.2018.01.007

• 科学研究 • 上一篇    下一篇

半城子流域油松林分枯落物蓄积量及持水特征

郑桂莲(), 宫殷婷, 王焱   

  1. 国家林业局调查规划设计院,北京 100714
  • 收稿日期:2017-12-01 修回日期:2018-01-09 出版日期:2018-02-28 发布日期:2020-09-27
  • 作者简介:郑桂莲(1984-),女,重庆人,工程师,硕士,主要研究方向:林业调查规划设计。Email:173837709@qq.com
  • 基金资助:
    国家林业局项目“湿地景观生态规划关键技术研究”(201404308)

The Storage Capacity and Water-holding Characteristics of Pinus tabulaeformis Litters in Banchengzi Catchment

ZHENG Guilian(), GONG Yinting, WANG Yan   

  1. Academy of Forestry Inventory and Planning,SFA,Beijing 100714,China
  • Received:2017-12-01 Revised:2018-01-09 Online:2018-02-28 Published:2020-09-27

摘要:

以北京山区典型小流域为研究区域,以主要林分类型油松林分为研究对象,对其枯落物层的蓄积量及持水特性进行定量分析,结果表明:1)研究区油松林分枯落物层平均蓄积量为21.86t/hm2,其中未分解层蓄积量7.04t/hm2(32.20%),半分解层蓄积量14.82t/hm2(67.80%),半分解层蓄积量明显高于未分解层;2)油松林分枯落物蓄积量受林分叶面积指数影响明显,随叶面积指数的增大而增加;3)枯落物持水过程表现为“迅速吸水—缓慢吸水—逐渐饱和”的过程,吸水速率随浸水时间的增加而减小,两者呈一定的幂函数关系(V=ktn)。研究结果可为小流域森林经营管理及其涵养水源功能监测提供参考。

关键词: 半城子流域, 油松, 枯落物, 蓄积量, 持水特征

Abstract:

Banchengzi catchment was selected as the study area,and Pinus tabulaeformis was selected to investigate the stock volume and water-holding capacity of litter layers.The results showed that:(1) the stock volume of Pinus tabulaeformis litters was 21.86t/hm2,of which the volume of undecomposed litters was 7.04t/hm2 and accounted for 32.20%,the volume of half decomposition was 14.82t/hm2 and accounted for 67.80%,and indicated that the volume of undecomposed litters was larger than undecomposed litters;(2) litters volume was significant with leaf area index(LAI),and increased with larger LAI;(3) the water holding of litters showed a process of “rapid absorption-slow absorption-gradual saturation”,the absorption rate decreased with immersion time,and showed a power function relationship(V=ktn).The research results can provide references for forest management and water holding monitoring process in catchments.

Key words: Banchengzi catchment, Pinus tabulaeformis, litters, stock volume, water holding characteristics

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