The effects of wind erosion depending on cropping system and tillage method in a semi-arid region

Caihong Yang, Yanxiang Geng, Xing Zhou Fu, Jeffrey A. Coulter, Qiang Chai

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2 Scopus citations

Abstract

Wind erosion is a major environmental problem in arid and semi-arid regions, where it has significant impacts on desertification and soil degradation. To understand the effects of cropping systems and tillage methods on the reduction of soil wind erosion, wind tunnel investigations were performed on soil samples from an irrigated field in an experiment conducted in semi-arid northwestern China in 2016–2018. Three cropping systems for annual spring wheat (Triticum aestivum L.)/maize (Zea mays L.) strip intercropping (W/M), a two-year wheat-winter rape-maize rotation (WRM), and a two-year wheat-maize rotation (WM)) were each evaluated with two tillage methods (conventional tillage without wheat straw retention (CT) and no-tillage with 25–30 cm tall wheat straw (NT)). The mean rate of soil erosion by wind with NT was 18.9% to 36.2% less than that with CT. With increasing wind velocity, the rate of soil erosion by wind increased for both CT and NT but was faster with CT than NT. Soil wind erosion occurred with a wind velocity ≥14 m s−1, and NT greatly decreased the rate of soil erosion when wind velocity exceeded 14 m s−1. W/M, WRM, and WM with NT increased non-erodible aggregates by 53.7%, 53.7%, and 54.9% in 2017, and 51.3%, 49.6% and 44.6% in 2018, respectively, than conventional tillage. At a height of 0–20 cm, the rate of soil transport with CT decreased with increasing height. The volume of soil transport at a height of 0–4 cm and soil transport percentage at a height of 0–4 and 0–20 cm (Q0–4/Q0–20) with NT were less than with CT. These findings show that NT with cropping system intensification can be an effective strategy for resisting wind erosion in irrigated semi-arid regions, thereby reducing the negative environmental impacts of crop production.

Original languageEnglish (US)
Article number732
JournalAgronomy
Volume10
Issue number5
DOIs
StatePublished - May 2020

Bibliographical note

Funding Information:
Funding: This research was sponsored by Gansu Provincial Key Laboratory of Aridland Crop Science of Gansu Agricultural University (GSCS-2019-6), National Ten Thousand Talents Program, the Discipline Construction Fund Project of Gansu Agricultural University (GSAU-XKJS-2018–106), the National Natural Science Foundation of China (41561062, 31771738), the Natural Science Foundation of Gansu Province of China (18JR3RA176), and the Modern Agriculture Green Manure Industry Technology System (CARS-22-G-12).

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

Keywords

  • Crop rotation
  • Intercropping
  • No tillage
  • Soil wind erosion
  • Wind-sand flow structure

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