Effects of Incorporated Wheat Straw Returning Combined Application with Nitrogen and Polyphenols on Soil Erosion Resistance

GUO Jinjin; FANG Nufang; LIU Qianjin; ZHANG Hanyu

doi:10.13870/j.cnki.stbcxb.2021.04.017

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Effects of Incorporated Wheat Straw Returning Combined Application with Nitrogen and Polyphenols on Soil Erosion Resistance

更新时间：2025-03-12

- Effects of Incorporated Wheat Straw Returning Combined Application with Nitrogen and Polyphenols on Soil Erosion Resistance
- Vol. 35, Issue 4, Pages: 122-128(2021)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所, 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. 中国科学院大学,北京,100049
  3. 山东省水土保持与环境保育重点实验室, 临沂大学资源环境学院,山东,临沂,276005
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2021.04.017
  CLC： S157.2
- Published：2021
- 稿件说明：
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GUO Jinjin, FANG Nufang, LIU Qianjin, et al. Effects of Incorporated Wheat Straw Returning Combined Application with Nitrogen and Polyphenols on Soil Erosion Resistance[J]. 2021, 35(4): 122-128.
DOI：

GUO Jinjin, FANG Nufang, LIU Qianjin, et al. Effects of Incorporated Wheat Straw Returning Combined Application with Nitrogen and Polyphenols on Soil Erosion Resistance[J]. 2021, 35(4): 122-128. DOI： 10.13870/j.cnki.stbcxb.2021.04.017.

摘要

小麦秸秆粉碎还田可改变土壤性质，进而影响土壤侵蚀阻力。以北方土石山区褐土为研究对象，利用L9（34）正交表对秸秆长度（2，5，8 cm）、秸秆还田量（2 000，4 000，8 000 kg/hm2）、纯氮施加量（100，140，180 kg/hm2）及纯多酚施加量（0，40，80 kg/hm2）4因素3水平进行正交设计，加空白对照共计10个处理。采用JET土壤侵蚀阻力测定仪测定土壤可蚀性和临界剪切力，分析秸秆粉碎还田对土壤侵蚀阻力的影响。结果表明：与对照相比，秸秆粉碎还田后各处理土壤临界剪切力均有所增大，但差异不显著（P>0.05），氮肥量对土壤临界剪切力影响显著，随氮肥量增加土壤临界剪切力先增加后减小。秸秆长度、还田量、氮肥量和多酚量对土壤可蚀性均具有显著影响，其中秸秆还田量和多酚量的影响贡献率较大，分别为50.61%和23.84%，其影响分别为负效应和正效应。秸秆粉碎还田条件下，土壤可蚀性可用土壤饱和含水量、>0.25 mm团聚体含量进行线性拟合（R2=0.81，P<0.01）；>0.25 mm水稳性团聚体含量与土壤可蚀性能较好地模拟土壤临界剪切力（R2=0.76，P<0.05）。研究结果有助于理解秸秆粉碎还田后土壤侵蚀阻力变化与机制，并可为模型模拟提供数据支持。

Abstract

Incorporated wheat straw returning can change soil properties

which in turn affects soil erosion resistance. In order to clarify the response of soil erosion resistance after incorporated wheat straw returning to the field

this study took cinnamon soil in the earth-rocky mountain areas of northern China as research object. The orthogonal design table of L9 (34) was used to arrange the treatments with factors of straw length (2

8 cm)

straw returning amount (2 000

4 000

8 000 kg/hm2)

pure nitrogen application amount (100

140

180 kg/hm2)

and pure polyphenol application amount (0

80 kg/hm2) at three gradients. Totally

the study had 10 treatments including a controlled trial. The soil erodibility and critical shear stress were measured by the JET equipment. The results showed that the soil critical shear stress of all returning treatments increased compared with the controlled trial

but the difference was not significant (P>0.05). The effect of nitrogen fertilizer on the soil critical shear stress was significant

and the critical shear stress firstly increased and then decreased with the increase of nitrogen fertilizer amount. The straw length

straw returning amount

nitrogen fertilizer

and polyphenol had significant influence on soil erodibility. The contribution rates of straw returning and polyphenol were 50.61% and 23.84%

with negative and positive effects

respectively. Under the condition of incorporated wheat straw returning to the field

the soil erodibility could be fitted linearly with soil saturated water content and >0.25 mm aggregate content (R2=0.81

P<0.01). The change of critical shear stress could be simulated with the content of water-stable aggregate of >0.25 mm and soil erodibility (R2=0.76

P<0.05). The results maybe helpful to understand the change and mechanism of soil erosion resistance after incorporated straw returning and provide data for soil erosion modeling.

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