Effects of shrub-grass patterns on soil detachment and hydraulic parameters of slope in the Pisha sandstone area of Inner Mongolia,China

作     者：Peng Chen Jianying Guo Tiegang Zhang Zhi Dong Hongli Li Suqian Qiu Xiaoxue Chen Peng Chen;Jianying Guo;Tiegang Zhang;Zhi Dong;Hongli Li;Suqian Qiu;Xiaoxue Chen

作者机构：College of Forestry of ShandongTaishan Forestry Ecosystem Research StationAgricultural UniversityTai’an 271018People’s Republic of China Taishan Forestry Ecosystem Research StationTai’an 271018People’s Republic of China Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of ChinaHohhot 010020People’s Republic of China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2022年第33卷第2期

页      面：519-528页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 

基　　金：supported financially by the National Natural Science Foundation of China (41701327,31870708,51879155,515 79157 and 5177915 6) the National Key Research and Development Program of China(2016YFC0500504) the Inner Mongolia Natural Science Foundation (2017BS0405) 

主　　题：Vegetation pattern Soil detachment rate Hydraulic parameters Soil erosion Caragana korshinskii 

摘      要：The characteristics of soil holding capacity for different shrub-grass patterns are important to research the mechanisms regulating vegetation on *** objective of this study was to describe the characteristics and mecha-nisms of soil erosion and hydraulic parameters under differ-ent vegetation patterns in the Pisha sandstone area of Inner Mongolia on lands of 8°slope *** carried out field scouring experiments on five different shrub-grass patterns as treatments,viz no shrubs(GL),shrubs on the upper part of the slope(SU),middle part of the slope(SM)and lower part of the slope(SL).We designated bare slope(BL)as the *** employed three different water flow rates(15,20,30 L·min^(−1)).Our results showed that the contribution of plant root systems to slope sediment reduction ranged from 64 to 84%.The root systems proved to be the main contributing factor to reduction of erosion by *** relationship between soil detachment rate,stream flow power,and flow unit stream power under different scouring discharge rates showed that soil detachment declined in rank order as:BLGLSUSM*** SL pat-tern had the lowest soil detachment rate(0.098 g·m^(−2)·s^(−1)),flow stream power(2.371 W·m^(−2)),flow unit stream power(0.165 m·s^(−1))and flow shear stress(16.986 Pa),and proved to be the best erosion combating *** results of decision coefficient and path analysis showed that stream power was the most important hydraulic parameter for describing soil detachment *** combination of stream power and shear stress,namely Dr=0.1ω−0.03τ−0.56(R^(2)=0.924),most accurately simulated the soil detachment characteristics on *** study suggests that the risk of soil ero-sion can be reduced by planting shrub-grass mixes on these *** the conditions of limited water resources and economy,the benefit of sediment reduction can be maxi-mized by planting shrubbery on the lower parts of slopes.