Gunnarsson, Anita
- Hortikultur, Sveriges lantbruksuniversitet
Sammanfattning
The residual nitrogen (N) effect on beetroot following harvested grass-clover (H-ley) or corresponding twice-cut green manure (GM-ley) was compared with a barley control. The residual N at beetroot harvest, calculated as N in beetroot crop and mineral N in the 0-90 cm soil layer, was 83 kg ha-1 for the GM-ley when barley was set to zero. The effect of GM-ley exceeded that of 3H-ley (3 harvests) by 74 kg N ha-1 and 2H-ley (2 harvests) by 42 kg N ha-1. Prediction of residual effects was studied using a model with a humification coefficient (hc) of 0.35 and another with different hc values for different plant materials. The former gave the best fit to observed data in regression analysis. The latter gave the best fit to observed data in absolute values. The residual N effect of GM biomass from summer cuttings corresponded to 40-70% of the potential effect.
Nyckelord
N dynamics; mixed ley; barley; previous crop; grass-clover ratio; Manova humification coefficient; sandy soil
Publicerad i
Journal of Plant Nutrition
2008, volym: 31, nummer: 8, sidor: 1355-1381
Utgivare: TAYLOR & FRANCIS INC
SLU författare
Linden, Börje
- Institutionen för markvetenskap, Sveriges lantbruksuniversitet
- Institutionen för markvetenskap, Sveriges lantbruksuniversitet
Gertsson, Ulla
- Hortikultur, Sveriges lantbruksuniversitet
- Hortikultur, Sveriges lantbruksuniversitet
UKÄ forskningsämne
Trädgårdsvetenskap/hortikultur
Jordbruksvetenskap
Miljö- och naturvårdsvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1080/01904160802206190
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/19854