岷江源头区乔灌交错带地被物和土壤持水能力
作者:
作者单位:

作者简介:

马志良(1988-),男,博士研究生,主要从事山地灌丛土壤碳循环研究。E-mail:feng281@126.com

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(31570476);国家科技基础性工作专项(2015FY110300)


Water Holding Capacity of Soils and Ground Covers in a Forest-shrub Ecotone of the Source Area of Minjiang River
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    通过野外调查和室内试验,定量评价了岷江源头区交错带云杉针叶林、云杉针叶林—山生柳灌丛交错区(乔灌)和窄叶鲜卑花灌丛3个林型的地被物(枯落物和苔藓)和土壤持水特征。结果表明:3个林型地被物储量差异显著,其大小顺序为乔灌(72.67 t/hm2) > 针叶林(43.87 t/ hm2) > 灌丛(11.00 t/hm2);针叶林和乔灌的苔藓层的储量分别为27.00,44.71 t/hm2,占地被物总储量的61.5%以上。地被物层最大持水总量表现为乔灌(21.23 mm) > 针叶林(11.33 mm) > 灌丛(2.45 mm);针叶林和乔灌枯落物层的最大持水量分别为7.45,12.12 mm,均大于苔藓层的最大持水量;针叶林和乔灌枯落物层和苔藓层最大持水量分别是其储量的4.3~4.4,1.4~2.0倍。土壤容重随土层深度增加而增大,持水能力则随土层深度增加而降低;0—20 cm最大持水量大小顺序为乔灌(153.70 mm) > 灌丛(132.28 mm) > 针叶林(128.25 mm)。综合地被物持水和土壤持水,交错带生态系统的持水能力在不同林型间差异显著,其最大持水量表现为乔灌(174.93 mm) > 针叶林(139.58 mm) > 灌丛(134.73 mm),其中,土壤层是生态系统持水能力的主导层,占综合持水量的87.9%以上。研究结果有利于全面认识岷江源头区生态水文效应。

    Abstract:

    Through field investigation and laboratory experiment, this study quantitatively evaluated the water holding capacities of ground covers (litter and moss) and soils among three forest types (Picea likiangensis coniferous forest, Picea likiangensis coniferous forest-Salix oritrepha shrub and Sibiraea angustata shrub) in an ecotone of the source area of Minjiang River. The results showed that the reserves of ground covers was significantly different among the three forest types, which was following the order of forest-shrub (72.67 t/hm2) > coniferous forest (43.87 t/hm2) > shrub (11.00 t/hm2). The reserves of moss was 27.00 t/hm2 and 44.71 t/hm2 in coniferous forest and forest-shrub, respectively, which accounted for more than 61.5% of the ground cover reserves. The maximum water holding capacity of ground covers followed the order of forest-shrub (21.23 mm) > coniferous forest (11.33 mm) > shrub (2.45 mm). The maximum water holding capacities of litters was 7.45 and 12.12 mm in coniferous forest and forest-shrub, respectively, which were both larger than those of moss layers. Moreover, the maximum water holding capacity of litter and moss was 4.3~4.4 and 1.4~2.0 times larger than those of their reserves in coniferous forest and forest-shrub, respectively. The soil bulk density increased and the maximum water holding capacity of soil decreased with the increasing of soil depths. The maximum water holding capacity of soil in 0—20 cm depth was in the order of forest-shrub (153.70 mm) > shrub (132.28 mm) > coniferous forest (128.25 mm). Combined considering the water holding capacity of ground covers and soils, the water holding capacity of the ecotone ecosystem was significantly different among the three forest types, following the order of forest-shrub (174.93 mm) > coniferous forest (139.58 mm) > shrub (134.73 mm). Moreover, the soil layer was the dominant component of the water holding capacity of ecosystem, accounting for more than 87.9% of the total water holding capacity of the whole ecosystem. These results would increase our comprehensive understanding of the eco-hydrological effects in the source region of Minjiang River.

    参考文献
    相似文献
    引证文献
引用本文

马志良, 赵文强, 刘美, 朱攀, 刘庆.岷江源头区乔灌交错带地被物和土壤持水能力[J].水土保持学报,2018,32(5):146~150

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2018-03-09
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2018-10-16
  • 出版日期: