Response of Soil Erodibility on the Loess Plateau to the Grain to Green Program

HUANG Wanyun; ZHAO Yunge; LIU Baoyuan; WANG Shanshan; YANG Kai; SUN Hui; GU Kangmin

doi:10.13870/j.cnki.stbcxb.2023.04.013

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Response of Soil Erodibility on the Loess Plateau to the Grain to Green Program

更新时间：2025-03-12

- Response of Soil Erodibility on the Loess Plateau to the Grain to Green Program
- Vol. 37, Issue 4, Pages: 94-100(2023)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  3. 西北农林科技大学资源环境学院, 陕西杨凌,712100
  4. 西北农林科技大学林学院, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2023.04.013
  CLC： S157.1
- Published：2023
- 稿件说明：
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HUANG Wanyun, ZHAO Yunge, LIU Baoyuan, et al. Response of Soil Erodibility on the Loess Plateau to the Grain to Green Program[J]. 2023, 37(4): 94-100.
DOI：

HUANG Wanyun, ZHAO Yunge, LIU Baoyuan, et al. Response of Soil Erodibility on the Loess Plateau to the Grain to Green Program[J]. 2023, 37(4): 94-100. DOI： 10.13870/j.cnki.stbcxb.2023.04.013.

摘要

退耕还林(草)的实施显著影响黄土高原退耕地土壤理化属性

进而可能影响土壤可蚀性。然而

目前黄土高原全区土壤可蚀性对退耕方式的响应及其区域特征尚不明确。为此

以耕地为对照

以黄土高原4个降雨量带内(200~300

300~400

400~500

>500 mm)的3种退耕地(乔木林地、灌木地和草地)为对象

通过野外调查和室内分析

研究不同类型退耕地土壤理化性质

采用EPIC模型估算土壤可蚀性

分析不同退耕方式对黄土高原不同区域土壤可蚀性的影响。结果表明:就整个黄土高原而言

退耕地0—20 cm土壤有机碳含量增加1.22~2.83 g/kg

乔木林地、灌木地和草地的土壤有机碳含量分别平均增加1.70

1.72

2.72 g/kg。黄土高原仅200~300 mm降雨量带内的草地与耕地的黏粒差异显著

300~400

400~500

>500 mm降雨量带内的各类型退耕地间的黏粒、粉砂粒和砂粒差异不显著。相较于耕地

退耕地土壤可蚀性呈现降低趋势

由0.012 4 (t·hm2·h)/(hm2·MJ·mm)降至0.011 5 (t·hm2·h)/(hm2·MJ·mm)

但差异不显著

乔木林地、灌木地、草地与耕地间土壤可蚀性亦无显著差异。总体表明

退耕还林(草)虽显著提高土壤有机碳含量

但并未显著影响颗粒组成和土壤可蚀性。研究结果可为预报黄土高原退耕后的土壤侵蚀提供科学依据。

Abstract

The implementation of Grain to Green Program (GTGP) significantly affects the physicochemical properties of the soil on the Loess Plateau

which may influence the soil erodibility. However

the response of soil erodibility to GTGP and its regional characteristics across the Loess Plateau were still unclear. Accordingly

with cultivated land as the control

the soil physicochemical properties of three types of reclaimed farmland (forest

shrub land and grassland) in four rainfall zones (200~300

300~400

400~500

>500 mm) on the Loess Plateau were studied through field investigation and laboratory analysis. The EPIC model was used to estimate soil erodibility and analyze the effects of different conversion types on soil erodibility in different areas of the Loess Plateau. The results showed that in the whole Loess Plateau

the soil organic carbon content of 0—20 cm of GTGP increased by 1.22~2.83 g/kg

and the soil organic carbon content of forest

shrub

and grassland increased by 1.70

1.72 and 2.72 g/kg

respectively. In the Loess Plateau

there were significant differences in the clay particles between grassland and farmland within the rainfall zone of 200~300 mm

but there were no significant differences in the clay particles

silt particles and sand particles among different types of converted farmland in the rainfall zone of 300~400

400~500 and >500 mm. Soil erodibility before and after GTGP on the Loess Plateau showed a decreasing trend from 0.012 4 to 0.011 5 (t·hm2·h)/(hm2·MJ·mm)

respectively

but the difference was not significant

and there was no significant difference in soil erodibility among forest

shrub

grassland and cultivated land. Overall

the GTGP greatly enhanced the soil organic carbon content

but had no effect on soil particle composition and soil erodibility. The results can provide a scientific basis for predicting soil erosion on the Loess Plateau after GTGP.

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