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Holmkvist, Anna, 2008. Potato yield and soil physical properties as affected by subsoiling. SLU, Agrosystems (until 121231), Alnarp. Alnarp: SLU, Agrosystems (until 121231)

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Abstract

Agriculture practices today include the use of heavy machinery which leads to soil compaction. High soil strengths are known to restrict the root development and prevent root growth. Sandy soils, which often are used in potato production, seem to be especially susceptible to subsoil compaction. Subsoiling is a way to loosen up the plough pan by deeper tillage. General it decreases soil strength and bulk density, the effect is that the roots can penetrate further down in the soil which may reduce stress caused by inadequate water and nutrient supply. The persistence of subsoiling is dependent on several factors such as soil moisture at the time of subsoiling, the choice of subsoiling equipment and traffic practices following the subsoiling. The best way to prevent recompaction is to apply controlled wheel traffic. The conclusion from my literature study is that under near optimum irrigation levels subsoiling are of no benefit to the yield but during more drought conditions the additional rooting volume significantly increase potato yields, but have no effect on the quality. Therefore subsoiling can be of importance in areas were irrigation is not used.

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Idag används mycket tunga maskiner i lantbruket, vilket orsakar skador på jordens struktur och därmed ger sammanpackade jordar. Packskadorna uppstår ofta precis under normalt plöjningsdjup och bildar då en så kallad plogsula. Rötterna har svårt att tränga igenom plogsula och resultatet kan bli ett grundare rotsystem som gör att växten stressas av vatten- och näringsbrist. Djupbearbetning kan lösa upp plogsulan och underlätta rotpenetreringen, därigenom kan stress undvikas. Hur länge effekten av djupbearbetning kvarstår beror på flera faktorer, så som markfukt vid bearbetningen, val av utrustning samt körrutiner efter djupbearbetningen. Bästa sättet att reducera packskador är att använda sig av permanenta körspår. Slutsatsen från min litteraturstudie är att djupbearbetning inte har någon inverkan på skörden vid optimal vattenförsörjning men under torra förhållanden ger den ökade rotvolymen en signifikant ökning av skörden. Därför kan djupbearbetning vara att rekommendera i odlingar där bevattning inte används.

Main title:Potato yield and soil physical properties as affected by subsoiling
Authors:Holmkvist, Anna
Supervisor:Ekelöf, Joakim
Examiner:UNSPECIFIED
Series:Bachelor project in the Horticultural science programme
Volume/Sequential designation:2008:2
Year of Publication:2008
Level and depth descriptor:Other
Student's programme affiliation:YHORT Horticultural Science Programme (admitted after 2000 and before July 1, 2007) 300 HEC
Department:(LTJ, LTV) > Agrosystems (until 121231)
Keywords:soil compaction, soil strength, root development, potato, solanum tuberosum, potato production, deep tillage, bulk density, subsoiling, potato yield, potato quality, inter-row subsoiling, chiseling, plough pan, infiltatation, zone tillage
URN:NBN:urn:nbn:se:slu:epsilon-s-9017
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-9017
Subjects:SLU > (LTJ, LTV) > Agrosystems (until 121231)
Soil cultivation
Language:English
Deposited On:22 Nov 2017 09:13
Metadata Last Modified:22 Nov 2017 09:13

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