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Rice paddies reduce subsequent yields of wheat due to physical and chemical soil constraints

Citation

Yang, R and Wang, Z and Fahad, S and Geng, S and Zhang, C and Harrison, MT and Adnan, M and Saud, S and Zhou, M and Liu, K and Wang, X, Rice paddies reduce subsequent yields of wheat due to physical and chemical soil constraints, Frontiers in Plant Science, 13 Article 959784. ISSN 1664-462X (2022) [Refereed Article]


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Copyright Statement

Copyright 2022 Yang, Wang, Fahad, Geng, Zhang, Harrison, Adnan, Saud, Zhou, Liu and Wang. The published article is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

DOI: doi:10.3389/fpls.2022.959784

Abstract

Yields of wheat crops that succeed rice paddy crops are generally low. To date, it has been unclear whether such low yields were due to rice paddies altering soil physical or mineral characteristics, or both. To investigate this quandary, we conducted field experiments in the Jianghan Plain to analyze differences in the spatial distribution of wheat roots between rice-wheat rotation (RW) and dryland-wheat rotations (DW) using a range of nitrogen treatments. Dryland wheat crops were preceded by either dryland soybean or corn in the prior summer. Biomass of wheat crops in RW systems was significantly lower than that of DW for all N fertilizer treatments, although optimal nitrogen management resulted in comparable wheat yields in both DW and RW. Soil saturated water capacity and non-capillary porosity were higher in DW than RW, whereas soil bulk density was higher in RW. Soil available nitrogen and organic matter were higher in DW than RW irrespective of N application, while soil available P and K were higher under RW both at anthesis and post-harvest stages. At anthesis, root length percentage (RLP) was more concentrated in surface layers (020 cm) in RW, whereas at 2040 cm and 4060 cm, RLP was higher in DW than RW for all N treatments. At maturity, RLP were ranked 020 > 2040 > 4060 cm under both cropping systems irrespective of N fertilization. Root length percentage and soil chemical properties at 020 cm were positively correlated (r = 0.79 at anthesis, r = 0.68 at post-harvest) with soil available P, while available N (r = −0.59) and soil organic matter (r = −0.39) were negatively correlated with RLP at anthesis. Nitrogen applied at 180 kg ha−1 in three unform amounts of 60 kg N ha−1 at sowing, wintering and jointing resulted in higher yields than other treatments for both cropping systems. Overall, our results suggest that flooding of rice paddies increased bulk density and reduced available nitrogen, inhibiting the growth and yield of subsequent wheat crops relative to rainfed corn or soybean crops.

Item Details

Item Type:Refereed Article
Keywords:irrigation, water use, nitrogen, fertilizer, sustainability, eutrophication, wheat, rice, maize, food security, roots, biomass, soils, nutrient loading, soybean, corn, anthesis, phenology, genetics, agronomy, systems, rotation, cropping, environment
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Agriculture, land and farm management
Research Field:Agricultural hydrology
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Evaluation, allocation, and impacts of land use
UTAS Author:Harrison, MT (Associate Professor Matthew Harrison)
UTAS Author:Zhou, M (Professor Meixue Zhou)
UTAS Author:Liu, K (Dr Ke Liu)
ID Code:150853
Year Published:2022
Deposited By:TIA - Research Institute
Deposited On:2022-07-04
Last Modified:2023-02-21
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