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[1]ZHANG Huan,MU Xingmin,GAO Peng.Variation of Litter Accumulation and Water Holding Capacity at Different Site Conditions in the Loess Plateau[J].Research of Soil and Water Conservation,2021,28(03):45-52.

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Variation of Litter Accumulation and Water Holding Capacity at Different Site Conditions in the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 03 Page number: 45-52 Column: Public date: 2021-04-20

Title:: Variation of Litter Accumulation and Water Holding Capacity at Different Site Conditions in the Loess Plateau

Author(s):: ZHANG Huan¹, MU Xingmin^1,2, GAO Peng^1,2,3; (1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University,Yangling,Shaanxi 712100, China;2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100, China;3.University of Chinese Academy of Sciences,Beijing 100049,China)

Keywords:: Loess Plateau; site condition; litter volume; water-holding capability; different vegetation zones

CLC:: S715.7

DOI:: -

Abstract:: Litter plays an important role in water conservation and runoff regulation, which has great significance for evaluating the water and soil conservation function of litter during the ecological restoration of the Loess Plateau. In order to investigate the properties of the litter layer of the herb communities, three typical vegetation zones were chosen at different site conditions in the Loess Plateau, and effect of litter on hydrological functioning was assessed. The results show that:(1)the litter accumulation in different vegetation zones decreased in the order: forest(154.25～392.95 g/m²)>forest-steppe(151.27～287.58 g/m²)>grassland(109.24～174.81g/m²), and the litter accumulation in the shady slope was generally higher than that in the sunny slope, and higher on the gully slope than that on the ridge slope;(2)the natural moisture contents of litter in forest zone, forest-steppe zone and grassland zone were 28%～54.5%, 26.8%～41% and 20.7%～31.3%, respectively; the maximum water-holding capacities of litter were 3.26～3.64,2.94～3.2 and 1.63～1.92 times of litter mass, respectively, and the maximum moisture absorption ratios were 3.26～3.64, 2.94～3.21 and 2.63～2.92, respectively;(3)the relationship between the obtained values of water holding capacity and soaking time of litter followed the logarithmic function well(R²>0.91), and the relationship between the water absorption rate and soaking time could be described by power function well(R²>0.99);(4)the effective runoff interception of litter followed the order: forest(219.86～787.09 g/m²)>forest-steppe(188.15～437.7 g/m²)>grassland(99.89～181.22 g/m²), indicating that the forest zone had the largest contribution to runoff interception, followed by forest grassland and grassland. Overall, different site conditions had significant impacts on litter accumulation and water holding capacity.

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Last Update: 2021-04-20