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Impact of loosening...
Impact of loosening and straw addition to the subsoil on crop performance and nitrogen leaching: A lysimeter study
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- Getahun, Gizachew Tarekegn (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment
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- Bergström, Lars (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment
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- Rychel, Katrin (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment
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- Kätterer, Thomas (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology
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- Kirchmann, Holger (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment
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(creator_code:org_t)
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- 2021-06-30
- 2021
- Engelska.
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Ingår i: Journal of Environmental Quality. - : Wiley. - 0047-2425 .- 1537-2537. ; 50, s. 858-867
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https://doi.org/10.1...
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https://res.slu.se/i...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Publikations- och innehållstyp
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- art (ämneskategori)
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