Sammanfattning

Estimates of soil N mineralization capacity and the factors that control the rates are necessary for optimal N management. Long-term field experiments can be used to measure how different management options affect the amount and quality of soil organic matter (SOM) - the substrate for N mineralization. Net N mineralization was estimated in a pot experiment as N uptake by ryegrass ( Lolium perenne) grown in pots with soils from 30 Swedish long-term field fertility experimental treatments ( 16 - 40 years). The long-term management effects of cereal and ley rotations, crop residue removal and return and inorganic N application on ryegrass N uptake were investigated and related to soil organic carbon (SOC) content. Total plant N uptake during three months varied between 9 and 27 mg N kg(-1) ( 23 - 67 kg N ha(-1)) and increased with SOC concentration and previous application levels of inorganic N. Soil from crop rotations with ley mineralized about 50% more N than soil from crop rotations with only cereals. Plant N uptake and SOC were not significantly affected by crop residue return

Publicerad i

Acta Agriculturae Scandinavica, Section B - Soil and Plant Science
2005, Volym: 55, nummer: 1, sidor: 16-22
Utgivare: TAYLOR & FRANCIS AS

SLU författare

• Röing de Nowina, Kristina

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

• Mattsson, Lennart

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

• Andrén, Olof

  • Institutionen för markvetenskap, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Jordbruksvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1080/09064710510008739

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/9662