Root decomposition at high and low N supply throughout a crop rotation
Soil nitrogen (N) dynamics can be modified by cover crops in rotations with cereals. Although, roots area major source of N, little is known about the dynamics of root decomposition of cash and cover crops. The objective of this study was to assess the effects that cover crop species have on i) the decompositionof spring wheat roots during the growth of cover crops, and ii) the decomposition of cover crop rootsduring the growing season of spring wheat. The experiment aimed also at comparing three non-winterhardy cover crops of varying shoot C-N ratios under low and high N input levels of 6 and 12 g N m-² y -¹respectively. The experiment included spring wheat (Triticum aestivum L.) as the main crop and non - winter hardy cover crops (yellow mustard (Sinapis alba L.), phacelia (Phacelia tanacetifolia Benth), andsunflower (Helianthus annuus L.) as well as bare soil fallow treatment. Minirhizotrons were used to non - destructively assess the spatial and temporal patterns of root growth and decomposition from 0.10 to1.00 m. Simultaneously, we grew all crops in soil columns to measure destructively C and N content in theroots. We concluded that wheat root decomposition was not affected by cover crop species. In contrast,during the growing season of wheat root decomposition of yellow mustard was on average twice as highfor phacelia and sunflower as a consequence of a higher production of roots with a significantly higher C-N ratio compared to the other cover crops.
Main Authors: | Herrera, Juan Manuel, Büchi, L., Rubio, Gerardo, Torres Guerrero, C., Wendling, M., Stamp, Peter, Pellet, D. |
---|---|
Format: | Texto biblioteca |
Language: | eng |
Subjects: | COVER CROPS, ROOT TURN OVER, ROOT CARBON NITROGEN RATIO, WHEAT, RHIZOTRONS, MINIRHHIZOTRONSA, |
Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45724 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Deciphering Root Architectural Traits Involved to Cope With Water Deficit in Oat
by: Canales, Francisco José, et al.
Published: (2019-11-28) -
PhenoRoots: an inexpensive non-invasive phenotyping system to assess the variability of the root system architecture.
by: MARTINS, S. M., et al.
Published: (2020-01-15) -
Short note Root restriction hindered early allometric differentiation between seedlings of two provenances of Canary Island Pine
by: Climent Maldonado, José María, et al.
Published: (2008) -
Estratégias de resposta de genótipos de Panicum maximum ao estresse por déficit hídrico.
by: ZECCHIN, N. S., et al.
Published: (2017-11-20) -
Characterization of cover crops for use in olive groves and vineyards in certified systems under Mediterranean conditions
by: Soriano, Mª Auxiliadora, et al.
Published: (2016-05)