Responses of Soil Nutrients to Soil Erosion and Deposition at Watershed Scale in the Thin Layer Mollisol Area of Northeast China

WEI Hanmei; ZHENG Fenli; FENG Zhizhen; ZHAO Miaomiao

doi:10.13870/j.cnki.stbcxb.2021.04.008

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Responses of Soil Nutrients to Soil Erosion and Deposition at Watershed Scale in the Thin Layer Mollisol Area of Northeast China

更新时间：2025-03-12

- Responses of Soil Nutrients to Soil Erosion and Deposition at Watershed Scale in the Thin Layer Mollisol Area of Northeast China
- Vol. 35, Issue 4, Pages: 49-54(2021)
- 作者机构：
  
  1. 西北农林科技大学水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 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
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.008
  CLC： S157.1
- Published：2021
- 稿件说明：
移动端阅览
WEI Hanmei, ZHENG Fenli, FENG Zhizhen, et al. Responses of Soil Nutrients to Soil Erosion and Deposition at Watershed Scale in the Thin Layer Mollisol Area of Northeast China[J]. 2021, 35(4): 49-54.
DOI：

WEI Hanmei, ZHENG Fenli, FENG Zhizhen, et al. Responses of Soil Nutrients to Soil Erosion and Deposition at Watershed Scale in the Thin Layer Mollisol Area of Northeast China[J]. 2021, 35(4): 49-54. DOI： 10.13870/j.cnki.stbcxb.2021.04.008.

摘要

分析薄层黑土区流域尺度土壤养分与土壤侵蚀速率之间的空间分布关系，可为土壤侵蚀退化评价提供重要的科学依据。基于土壤样品采集与分析测定，结合137Cs示踪技术，对比了典型薄层黑土区流域侵蚀区和沉积区的土壤养分含量，明确了流域尺度土壤养分含量及其空间分布对侵蚀—沉积速率的响应。结果表明：（1）在流域尺度土壤侵蚀对土壤养分含量有重要影响，侵蚀部位土壤有机碳（SOC）、全氮（TN）、硝态氮（NO3—N）和速效磷（AP）含量较之沉积部位分别降低27.4%，21.1%，29.2%和54.1%，SOC和TN含量在侵蚀部位和沉积部位存在极显著差异，AP含量在侵蚀部位和沉积部位存在显著差异，而NO3—N含量在侵蚀部位和沉积部位无显著差异。（2）土壤SOC、TN和AP含量与土壤侵蚀速率呈极显著负相关关系。（3）流域尺度土壤SOC和TN含量空间分布与土壤侵蚀—沉积速率的空间分布呈相反的变化趋势，表明在研究流域土壤侵蚀是造成土壤质量退化的关键驱动因子。

Abstract

Studies on soil nutrient responses to soil erosion and deposition at watershed scale can provide important scientific basis for soil erosion risk assessment. The Binzhou watershed

a typical thin layer Mollisol region in Northeast China

was selected as the study area. Based on soil sample collection and laboratory analysis

and combined with 137Cs tracer method

the soil nutrient contents between erosion-dominant sites and deposition-dominant sites were compared

and the spatial distribution of soil nutrients at watershed scale and their responses to soil erosion and deposition rates were explicated. The results showed that soil erosion-deposition processes obviously affected soil nutrient contents at watershed scale. Comparing with soil deposition-dominant sites

the contents of soil organic carbon (SOC)

total nitrogen (TN)

NO3—N and available phosphorus (AP) at the soil erosion-dominant sites were reduced by 27.4%

21.1%

29.2% and 54.1%

respectively. Meanwhile

the SOC and TN contents between both in soil deposition and erosion sites had extremely significant differences

and the AP contents at both sites had significant difference; while there was no significant difference in NO3—N contents at the both sites. The contents of SOC

TN and AP had significant negative correlations with soil erosion rates. Moreover

the spatial distributions of SOC and TN contents at the watershed scale were opposite to the spatial distribution of soil erosion rate

which indicated that soil erosion was the key driving factor for soil quality degradation in the study area.

关键词

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