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Impact of loosening and straw addition to the subsoil on crop performance and nitrogen leaching: A lysimeter study

Getahun, Gizachew Tarekegn and Bergström, Lars and Rychel, Katrin and Kätterer, Thomas and Kirchmann, Holger (2021). Impact of loosening and straw addition to the subsoil on crop performance and nitrogen leaching: A lysimeter study. Journal of Environmental Quality. 50 , 858-867
[Research article]

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Abstract

Poor subsoil properties are difficult to ameliorate and detrimental to soil fertility and crop yield. The effects of loosening (L) and loosening + straw (LS) similar to 60 Mg ha(-1) into the subsoil (25-40 cm depth) on crop yield, water flow, and the nitrogen (N) balance components under bare soil conditions and a barley (Hordeum vulgare L.) crop were investigated in an about 21-mo lysimeter study and compared with a control treatment. Undisturbed soil columns (n = 12) were excavated from an agricultural field in May 2016, installed at a lysimeter station, and exposed to outdoor climatic conditions in Uppsala, Sweden, in August 2016. Spring barley ('Makof') was grown between June and September 2017. Total N leaching loads over the 21 mo were high (74-193 kg ha(-1)). The LS treatment reduced the N load by 49% (P = .01) and 62% (P = .001) compared with the L and control treatments, respectively. Loosening reduced N load by 25% (P < .07) compared with the control. Emissions of N2O were low (0.04-0.07 kg N ha(-1)), and no differences were observed between treatments. Leaf relative chlorophyll content was lower in the LS treatment than in the L and control treatments (P < .05). Yield was also lowest in the LS treatment (5.8 Mg ha(-1)) and was 7 and 8.5% lower than in the control and L treatments (P > .05), respectively. These results suggest that LS can reduce N leaching. The overall effects of LS on crop performance and N removal and leaching should be further scrutinized in long-term field studies.

Authors/Creators:Getahun, Gizachew Tarekegn and Bergström, Lars and Rychel, Katrin and Kätterer, Thomas and Kirchmann, Holger
Title:Impact of loosening and straw addition to the subsoil on crop performance and nitrogen leaching: A lysimeter study
Series Name/Journal:Journal of Environmental Quality
Year of publishing :2021
Volume:50
Page range:858-867
Number of Pages:10
Publisher:WILEY
ISSN:0047-2425
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
URN:NBN:urn:nbn:se:slu:epsilon-p-113012
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113012
Additional ID:
Type of IDID
DOI10.1002/jeq2.20231
Web of Science (WoS)000668355300001
ID Code:24965
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:20 Aug 2021 07:25
Metadata Last Modified:20 Aug 2021 07:31

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