Effects of SAP Application on Slope Erosion Process of Granite Red Soil

CHEN Shiting; ZHA Ruibo; MAO Lanhua; JIANG Xingxue; KANG Peipei

doi:10.13870/j.cnki.stbcxb.2021.05.007

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Effects of SAP Application on Slope Erosion Process of Granite Red Soil

更新时间：2025-03-12

- Effects of SAP Application on Slope Erosion Process of Granite Red Soil
- Vol. 35, Issue 5, Pages: 44-49(2021)
- 作者机构：
  
  1. 福建师范大学地理科学学院,福州,350007
  2. 福建省亚热带资源与环境重点实验室,福州,350007
  3. 福建师范大学旅游学院,福州,350007
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.05.007
  CLC： S157.1
- Published：2021
- 稿件说明：
移动端阅览
CHEN Shiting, ZHA Ruibo, MAO Lanhua, et al. Effects of SAP Application on Slope Erosion Process of Granite Red Soil[J]. 2021, 35(5): 44-49.
DOI：

CHEN Shiting, ZHA Ruibo, MAO Lanhua, et al. Effects of SAP Application on Slope Erosion Process of Granite Red Soil[J]. 2021, 35(5): 44-49. DOI： 10.13870/j.cnki.stbcxb.2021.05.007.

摘要

南方花岗岩普遍存在红壤颗粒粗、物理特性差、保水保肥能力弱、水土流失严重等问题。为了探讨施用保水剂对花岗岩红壤坡面防治水土流失的作用，通过模拟降雨试验和室内分析试验，研究层施（K1）、沟施（K2）、混施（K3）保水剂和不施保水剂（CT）条件下坡面的侵蚀过程。结果表明：3种保水剂施用方式下，花岗岩红壤坡面初始产流时间较对照坡面延长1.09~1.61倍。坡面入渗率、含水量分别表现为K2>K3>K1>CT和K3>K1>K2>CT；在不同处理方式下，坡面减流率表现为K3>K2>K1，减沙率表现为K2>K3>K1。与对照坡面相比，混施保水剂处理下坡面累积产流量减少59%，累积产沙量减少66%，保水剂发挥了较好的减流减沙作用；不同保水剂处理方式下，花岗岩红壤坡面累积产流量和产沙量构成幂函数模型，相关系数>0.990。研究结果为花岗岩红壤坡面土壤侵蚀防控提供理论依据和实践参考。

Abstract

This research was based on the ecological problems of granite red soil in South China

such as the coarse texture

poor physical properties

serious soil erosion and so on. In order to reveal the effects of SAP application on slope erosion of granite red soil

a simulated rainstorm experimentwas conducted. SAP was applied with three methods:layering (K1)

furrowing (K2)

mixing (K3) application. The results showed that:(1) Under the application of SAP

the initial runoff production time of granite red soil slope was 1.09~1.61 times longer than that of the control. The orders of infiltration rate and the water contents were K2 > K3 > K1 > CT and K3 > K1 > K2 > CT respectively. (2) The order of flow reduction rate was K3 > K2 > K1

and the sediment reduction rate was shown as follow K2 > K3 > K1. Compared with the control slope

the cumulative runoff and sediment yield in mixing treatments decreased by 59% and 66%. The mixing treatments achieved the better benefits of soil and water conservation in this research. (3) Under the different treatments

the cumulative runoff and sediment yield formed a power function model on the granite slope of red soil

and the correlation coefficients were all greater than 0.990. The findings provided theoretical basis and practical references for the study on the granite slope of red soil.

关键词

Keywords

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