Understanding the effects of contour hedgerow and terracing hedgerow on soil and water conservation in the remote mountainous regions of Southwest China
ZHOU Ping, WEN Anbang, YAN Dongchun, SHI Zhonglin, LONG Yi
Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, the Key Laboratory of Mountain Surface Processes and Ecological Regulation, 610041, Chengdu, Sichuan, China
Abstract：[Background] Soil and water loss is a serious worldwide environmental problem, for example, soil loss from the sloping cultivated lands in the remote mountainous regions of Southwest China due to the abundant precipitation and steep sloping cultivated lands in these areas. Various soil protection techniques have been adopted to prevent soil loess, the local people did not admire the introduced contour hedgerow measurement from abroad; however, they have been actively accepted another traditional one, the terracing hedgerow. The purpose of this work is to understand the differences on soil and water conservation between contour hedgerow and terracing hedgerow. [Methods] The different structure between four treatments of contour hedgerow and terracing hedgerow were analysed. Meanwhile, three heights (0 cm, 10 cm, and 15 cm) of lynchet were set, and the soil erosion module, runoff efficiency, ratio of output and input, economic effects among the different treatments were compared. The soil anti-scourability was calculated using the equation, and analysis of variance ( ANOVA) was performed with SPSS 11.5 and Microsoft Excel software. [Results] The obvious difference was that terracing hedgerow with a certain height of walkway was more convenient for farming activities and effectively reduced soil and water loss. The treatment of terracing hedgerow 2 ( H15H) reduced runoff 55.56%±6.25% and reduced erosion modulus 79.26%±3.50% when compared to the sloping cultivated land plots with no lynchet and no hedgerow ( CK). The contributions of the independent variables on runoff, soil erosion reduction and soil anti-scouring were in the following order: terracing hedgerow 2 (H15H) > terracing hedgerow 1 (H10H) > contour hedgerow (H0H) > non-hedgerow (CK). The value of ratio of output to input of H15H treatment was 1.52, which was the highest value among different treatments. [Conclusions] Although the treatment of terracing hedgerow 2 ( H15H) needs more labour force, however, results in the higher hedgerow yield and ratio of output to input than other treatments as well as stronger anti-scourability. Thus, the traditional terracing hedgerow with 15 cm lynchet is recommended in the remote mountainous regions of Southwest China, even should be recommended often and used extensively in the similar climatic regions in other countries.
基金资助:the STS Program of the CAS （ KFJ-SW-STS-175）; the National Natural Foundation （41671286）; State's Key Project of Research and Development Plan （2016YFC0402301）; 973 Project （2015CB452704）.
通讯作者:
WEN Anbang (1964-), male, professor. Main research interests:soil erosion. E-mail:wabang@imde.ac.cn.
E-mail: wabang@imde.ac.cn
作者简介: ZHOU Ping(1981-),female, associate professor. Main research interests:soil and water conservation. E-mail:zp09@imde.ac.cn
引用本文:
周萍, 文安邦, 严冬春, 史忠林, 龙翼. 西南山区等高植物篱和植物固结地埂的水土保持功能的理解[J]. 中国水土保持科学, 2017, 15(2): 25-34.
ZHOU Ping, WEN Anbang, YAN Dongchun, SHI Zhonglin, LONG Yi. Understanding the effects of contour hedgerow and terracing hedgerow on soil and water conservation in the remote mountainous regions of Southwest China. SSWC, 2017, 15(2): 25-34.
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2017, Vol. 15 
