Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina

Cover crops (CC) provide many benefits to soils but their effect on decomposition of previous crop residues and release of nutrients in continuous no-tillage soybean [Glycine max (L.) Merr.] production are little known. Our objective was to quantify CC effects on decomposition and phosphorus (P) rel...

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Publicado:	2014
Materias:	Nutrient cycling Phosphorus Soil organic carbon Soybean residues Agricultural wastes Amino acids Biomass Crops Moisture determination Nitrogen fixation Nutrients Plants (botany) Microbial activities No-tillage systems Phosphorus release Residue decomposition Soybean [glycine max (l.) merr.] Soils cover crop crop production decomposition soybean zero tillage Argentina
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01671987_v143_n_p59_Varela http://hdl.handle.net/20.500.12110/paper_01671987_v143_n_p59_Varela
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_01671987_v143_n_p59_Varela
record_format	dspace
spelling	paper:paper_01671987_v143_n_p59_Varela2023-06-08T15:16:13Z Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina Nutrient cycling Phosphorus Soil organic carbon Soybean residues Agricultural wastes Amino acids Biomass Crops Moisture determination Nitrogen fixation Nutrients Phosphorus Plants (botany) Microbial activities No-tillage systems Nutrient cycling Phosphorus release Residue decomposition Soil organic carbon Soybean residues Soybean [glycine max (l.) merr.] Soils cover crop crop production decomposition soybean zero tillage Argentina Cover crops (CC) provide many benefits to soils but their effect on decomposition of previous crop residues and release of nutrients in continuous no-tillage soybean [Glycine max (L.) Merr.] production are little known. Our objective was to quantify CC effects on decomposition and phosphorus (P) release from soybean residue using litterbags. Three CC species (oat, Avena sativa L.; rye, Secale cereal L.; and rye grass, Lolium multiflorum L.) and a no CC control were evaluated. Temperature, moisture content, microbial biomass and microbial activity were measured in the surface 2cm of soil and residues. Cover crops increased soybean residue decomposition slightly both years (8.2 and 6.4%). Phosphorus release from soybean residue did not show any significant differences. Cover crops increased microbial biomass quantity and activity in both soil and residue samples (p<0.001, p=0.049 for soil and residue microbial biomass; p=0.060, p=0.003 for soil and residue microbial activity, respectively). Increased residue decomposition with CC was associated with higher soil and residue microbial biomass and activity, higher near-surface (0-2cm) moisture content (due to shading) and soil organic carbon enrichment by CC. Even though CC increased soybean residue decomposition (233kgha-1), this effect was compensated for by the annual addition of approximately 6500kgha-1 of CC biomass. This study demonstrated another role for CC when calibrating models that simulate the decomposition of residues in no-tillage systems. © 2014 Published by Elsevier B.V. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01671987_v143_n_p59_Varela http://hdl.handle.net/20.500.12110/paper_01671987_v143_n_p59_Varela
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Nutrient cycling Phosphorus Soil organic carbon Soybean residues Agricultural wastes Amino acids Biomass Crops Moisture determination Nitrogen fixation Nutrients Phosphorus Plants (botany) Microbial activities No-tillage systems Nutrient cycling Phosphorus release Residue decomposition Soil organic carbon Soybean residues Soybean [glycine max (l.) merr.] Soils cover crop crop production decomposition soybean zero tillage Argentina
spellingShingle	Nutrient cycling Phosphorus Soil organic carbon Soybean residues Agricultural wastes Amino acids Biomass Crops Moisture determination Nitrogen fixation Nutrients Phosphorus Plants (botany) Microbial activities No-tillage systems Nutrient cycling Phosphorus release Residue decomposition Soil organic carbon Soybean residues Soybean [glycine max (l.) merr.] Soils cover crop crop production decomposition soybean zero tillage Argentina Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
topic_facet	Nutrient cycling Phosphorus Soil organic carbon Soybean residues Agricultural wastes Amino acids Biomass Crops Moisture determination Nitrogen fixation Nutrients Phosphorus Plants (botany) Microbial activities No-tillage systems Nutrient cycling Phosphorus release Residue decomposition Soil organic carbon Soybean residues Soybean [glycine max (l.) merr.] Soils cover crop crop production decomposition soybean zero tillage Argentina
description	Cover crops (CC) provide many benefits to soils but their effect on decomposition of previous crop residues and release of nutrients in continuous no-tillage soybean [Glycine max (L.) Merr.] production are little known. Our objective was to quantify CC effects on decomposition and phosphorus (P) release from soybean residue using litterbags. Three CC species (oat, Avena sativa L.; rye, Secale cereal L.; and rye grass, Lolium multiflorum L.) and a no CC control were evaluated. Temperature, moisture content, microbial biomass and microbial activity were measured in the surface 2cm of soil and residues. Cover crops increased soybean residue decomposition slightly both years (8.2 and 6.4%). Phosphorus release from soybean residue did not show any significant differences. Cover crops increased microbial biomass quantity and activity in both soil and residue samples (p<0.001, p=0.049 for soil and residue microbial biomass; p=0.060, p=0.003 for soil and residue microbial activity, respectively). Increased residue decomposition with CC was associated with higher soil and residue microbial biomass and activity, higher near-surface (0-2cm) moisture content (due to shading) and soil organic carbon enrichment by CC. Even though CC increased soybean residue decomposition (233kgha-1), this effect was compensated for by the annual addition of approximately 6500kgha-1 of CC biomass. This study demonstrated another role for CC when calibrating models that simulate the decomposition of residues in no-tillage systems. © 2014 Published by Elsevier B.V.
title	Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
title_short	Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
title_full	Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
title_fullStr	Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
title_full_unstemmed	Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina
title_sort	cover crop effects on soybean residue decomposition and p release in no-tillage systems of argentina
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01671987_v143_n_p59_Varela http://hdl.handle.net/20.500.12110/paper_01671987_v143_n_p59_Varela
_version_	1768543415862034432

Cover crop effects on soybean residue decomposition and P release in no-tillage systems of Argentina

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