气候变化领域集成服务门户(CCPortal): Differences in interception storage capacities of undecomposed broad-leaf and needle-leaf litter under simulated rainfall conditions

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DOI	10.1016/j.foreco.2019.05.043
	Differences in interception storage capacities of undecomposed broad-leaf and needle-leaf litter under simulated rainfall conditions
	Zhao L.; Hou R.; Fang Q.
发表日期	2019
ISSN	0378-1127
起始页码	135
结束页码	142
卷号	446
英文摘要	Leaf litter is an important component of agroforestry ecosystems that plays a key role in soil and water conservation. This study assessed the effect of leaf shape on water interception under controlled laboratory conditions. Two contrasting leaf shapes (needle-leaf, represented by Pinus massoniana; and broad-leaf, represented by Magnolia grandiflora) were placed in a steel box (2 m long and 1 m wide) for separate experiments with different leaf masses per ground area (0.5, 1.0 and 1.5 kg/m2); the steel box was positioned on two different slopes (5° and 20°) corresponding to gentle and steep slopes; the rainfall intensity was 90 mm/h. The results indicated that leaf shapes had specific effects on the interception storage capacity of the leaf litter on a slope. The needle-leaf litter intercepted 2.08 times more rainwater than the broad-leaf litter on average. As the leaf mass increased, the interception storage capacity of the leaf litter successively increased for the needle-leaf litter, while there were no obvious patterns for the broad-leaf litter. This difference occurred because the initially erect broad leaves were easily flattened by raindrop impacts due to their large surface areas and hence formed a horizontal leaf cover (or leaf overlap). This leaf accumulation structure restricted the infiltration of rainwater into the lower leaf litter while providing a short path for rainwater to leave the leaf litter, hence promoting litter flow and leading to less rainwater intercepted by the broad-leaf litter than the needle-leaf litter. Our results provide a better understanding of the effects of leaf shape on leaf litter interception on inclined slopes, which is lacking in the current literature. © 2019 Elsevier B.V.
英文关键词	Interception storage capacity; Leaf shapes; Litter layer; Runoff; Vegetation cover
语种	英语
scopus关键词	Forestry; Rain; Runoff; Soil conservation; Water conservation; Agro-forestry ecosystems; Controlled laboratories; Leaf shape; Litter layer; Rainfall intensity; Soil and water conservation; Storage capacity; Vegetation cover; Needles; agroforestry; coniferous tree; forest ecosystem; interception; leaf; leaf litter; precipitation intensity; raindrop; runoff; vegetation cover; Capacity; Forestry; Needles; Rain; Runoff; Shape; Storage; Water Management; Magnolia grandiflora; Pinus massoniana
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155949
作者单位	College of Forestry, Guizhou University, Guiyang, Guizhou 550025, China
推荐引用方式 GB/T 7714	Zhao L.,Hou R.,Fang Q.. Differences in interception storage capacities of undecomposed broad-leaf and needle-leaf litter under simulated rainfall conditions[J],2019,446.
APA	Zhao L.,Hou R.,&Fang Q..(2019).Differences in interception storage capacities of undecomposed broad-leaf and needle-leaf litter under simulated rainfall conditions.Forest Ecology and Management,446.
MLA	Zhao L.,et al."Differences in interception storage capacities of undecomposed broad-leaf and needle-leaf litter under simulated rainfall conditions".Forest Ecology and Management 446(2019).