典型黑土区农业流域土壤侵蚀-沉积对土壤养分和酶活性的影响

耿华杰; 郑粉莉; 莫帅豪; 王雪松; 张加琼; 王彬; 付金霞

doi:10.13870/j.cnki.stbcxb.2023.04.007

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典型黑土区农业流域土壤侵蚀-沉积对土壤养分和酶活性的影响

更新时间：2025-03-12

- 典型黑土区农业流域土壤侵蚀-沉积对土壤养分和酶活性的影响
- Effects of Soil Erosion-deposition on Soil Nutrients and Enzyme Activities in An Agricultural Watershed of Chinese Mollisol Region
- 水土保持学报 2023年37卷第4期页码：47-53
- 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
  3. 北京林业大学水土保持学院,北京,100083
  4. 西北农林科技大学资源环境学院, 陕西杨凌,712100
- 作者简介：
  
  [ "耿华杰(1997-),男,在读硕士研究生,主要从事土壤侵蚀研究。E-mail:664420423@qq.com" ]
- 基金信息：
  
  国家重点研发计划项目(2022YFD1500102);中国科学院战略性先导科技项目(A类)(XDA28010201)
- DOI：10.13870/j.cnki.stbcxb.2023.04.007
  中图分类号： S158.1
- 纸质出版：2023
- 稿件说明：
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耿华杰, 郑粉莉, 莫帅豪, 等. 典型黑土区农业流域土壤侵蚀-沉积对土壤养分和酶活性的影响[J]. 水土保持学报, 2023,37(4):47-53.

GENG Huajie, ZHENG Fenli, MO Shuaihao, et al. Effects of Soil Erosion-deposition on Soil Nutrients and Enzyme Activities in An Agricultural Watershed of Chinese Mollisol Region[J]. 2023, 37(4): 47-53.
耿华杰, 郑粉莉, 莫帅豪, 等. 典型黑土区农业流域土壤侵蚀-沉积对土壤养分和酶活性的影响[J]. 水土保持学报, 2023,37(4):47-53. DOI： 10.13870/j.cnki.stbcxb.2023.04.007.

GENG Huajie, ZHENG Fenli, MO Shuaihao, et al. Effects of Soil Erosion-deposition on Soil Nutrients and Enzyme Activities in An Agricultural Watershed of Chinese Mollisol Region[J]. 2023, 37(4): 47-53. DOI： 10.13870/j.cnki.stbcxb.2023.04.007.

摘要

研究农业流域土壤侵蚀—沉积对土壤养分和酶活性的影响可为土壤侵蚀退化评价提供重要科学依据。选择典型薄层黑土区的宾州河流域为研究区

在流域上游、中游和下游各选取2个代表性坡面

基于137Cs示踪技术估算土壤侵蚀—沉积速率

分析流域和坡面尺度土壤侵蚀—沉积对土壤养分(有机质、全氮和速效磷)和土壤酶活性(转化酶、脲酶和碱性磷酸酶)的影响。结果表明:(1)土壤侵蚀速率在流域上游最大

分别是流域中游和下游的1.9

11.2倍;坡面尺度上土壤侵蚀速率在坡中部最大

分别是坡上部和坡下部的1.3~2.6

2.8~12.2倍。(2)在流域尺度上

土壤有机质空间分布与土壤侵蚀速率空间分布呈相反的变化趋势

土壤全氮和速效磷含量在流域下游皆大于流域中游;坡面尺度上土壤有机质、速效磷含量、转化酶、脲酶和碱性磷酸酶活性均表现为坡下部>坡中部

说明农地土壤侵蚀降低土壤养分含量和酶活性。(3)流域沉积区土壤沉积速率对土壤有机质、速效磷含量、脲酶和碱性磷酸酶活性有显著影响。(4)土壤有机质和速效磷含量对土壤脲酶和碱性磷酸酶活性有显著影响

表明土壤侵蚀—沉积引起的土壤养分再分布是造成土壤酶活性空间分异的重要原因。

Abstract

Identifying the effects of soil erosion-deposition on soil nutrients and enzyme activities in agricultural watersheds can provide an important scientific basis for soil erosion evaluation. Binzhou River Basin

a typical thin-layer Mollisol area

was selected as the study area

and two representative slopes were selected in the upstream

midstream and downstream of the basin. 137Cs tracer technique was used to estimate soil erosion-deposition rates and impacts of soil erosion-deposition on soil nutrients (organic matter

total nitrogen and available phosphorus) and soil enzyme activities (invertase

urease and alkaline phosphatase) at both watershed and sloping scales were analyzed. The results showed as follows: (1) The soil erosion rates were the highest in the upstream of the Binzhou River Basin

which were 1.9 and 11.2 times of those in the midstream and downstream

respectively; at the sloping scale

the soil erosion rates were the highest in the middle slope locations

which were 1.3~2.6 and 2.8~12.2 times of those in the upper and lower slope locations

respectively. (2) At the watershed scale

the spatial distribution of soil organic matter and soil erosion rates showed an opposite trend and the contents of total nitrogen and available phosphorus in the downstream were both greater than those in the midstream; on the sloping scale

the contents of soil organic matter and available phosphorus as well as the activities of soil invertase

urease and alkaline phosphatase in the lower slope locations were all greater than those in the middle slope locations

indicating that soil erosion in farmland declined soil nutrient contents and enzyme activities. (3) The soil deposition rates in the deposition areas of the watershed had significant impacts on the contents of soil organic matter and available phosphorus as well as the activities of soil urease and alkaline phosphatase. (4) The contents of soil organic matter and available phosphorus had significant impacts on the activities of urease and alkaline phosphatase

indicating that the redistribution of soil nutrients caused by soil erosion-deposition was an important reason for the spatial differentiation of soil enzyme activities.

关键词

Keywords

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