Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage
Under no-tillage field conditions, cover crop (CC) residues remain on the soil surface and decompose at a slow rate. We used three CC species (oat, Avena sativa L.; rye, Secale cereale L.; and ryegrass, Lolium multiflorum L.) to evaluate the residue biomass decomposition and P pools release–total ph...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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2018
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| Online Access: | http://hdl.handle.net/20.500.12123/3139 https://dl.sciencesocieties.org/publications/aj/abstracts/109/1/317?access=0&view=pdf https://doi.org/10.2134/agronj2016.03.0168 |
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| author | Varela, María Florencia Barraco, Miriam Raquel Gili, Adriana Anahí Taboada, Miguel Angel Rubio, Gerardo |
| author_browse | Barraco, Miriam Raquel Gili, Adriana Anahí Rubio, Gerardo Taboada, Miguel Angel Varela, María Florencia |
| author_facet | Varela, María Florencia Barraco, Miriam Raquel Gili, Adriana Anahí Taboada, Miguel Angel Rubio, Gerardo |
| author_sort | Varela, María Florencia |
| collection | INTA Digital |
| description | Under no-tillage field conditions, cover crop (CC) residues remain on the soil surface and decompose at a slow rate. We used three CC species (oat, Avena sativa L.; rye, Secale cereale L.; and ryegrass, Lolium multiflorum L.) to evaluate the residue biomass decomposition and P pools release–total phosphorus (Pt), inorganic phosphorus (Pi), and organic phosphorus (Po)–under no-tillage field conditions. The dynamics of biomass and P in CC residues was evaluated through the litterbag method during two annual periods in a long-term field experiment. Exponential decay models were fitted to each variable. Biomass decomposition and P release followed asymptotic decay models for the less labile residues (oat and rye) and single exponential decay models for the more labile ryegrass residues. Biomass and Pt showed rather equivalent dynamics, but Pi release was faster (Pi rates were three times higher and Pi plateaus were two to four times lower than biomass values). The release of Pt from CC residues reached agronomically significant quantities (2–16 kg ha–1) during the cash crop growing season and most of this Pt was released as Pi (53–100%). A positive tradeoff was observed between the release of Pi, potentially available for subsequent crop, and the residue biomass remaining over the soil. This means that Pi was released from residues, but enough biomass remained on the soil surface for erosion control. These results can be incorporated into predictive models on the contribution of CC residues to soil coverage and P nutrition of subsequent crops. |
| format | info:ar-repo/semantics/artículo |
| id | INTA3139 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA31392022-04-21T12:58:30Z Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage Varela, María Florencia Barraco, Miriam Raquel Gili, Adriana Anahí Taboada, Miguel Angel Rubio, Gerardo Biomasa Plantas de Cobertura Fósforo Cero-labranza Forrajes Biomass Cover Plants Phosphorus Zero Tillage Forage Cultivos de Cobertura Under no-tillage field conditions, cover crop (CC) residues remain on the soil surface and decompose at a slow rate. We used three CC species (oat, Avena sativa L.; rye, Secale cereale L.; and ryegrass, Lolium multiflorum L.) to evaluate the residue biomass decomposition and P pools release–total phosphorus (Pt), inorganic phosphorus (Pi), and organic phosphorus (Po)–under no-tillage field conditions. The dynamics of biomass and P in CC residues was evaluated through the litterbag method during two annual periods in a long-term field experiment. Exponential decay models were fitted to each variable. Biomass decomposition and P release followed asymptotic decay models for the less labile residues (oat and rye) and single exponential decay models for the more labile ryegrass residues. Biomass and Pt showed rather equivalent dynamics, but Pi release was faster (Pi rates were three times higher and Pi plateaus were two to four times lower than biomass values). The release of Pt from CC residues reached agronomically significant quantities (2–16 kg ha–1) during the cash crop growing season and most of this Pt was released as Pi (53–100%). A positive tradeoff was observed between the release of Pi, potentially available for subsequent crop, and the residue biomass remaining over the soil. This means that Pi was released from residues, but enough biomass remained on the soil surface for erosion control. These results can be incorporated into predictive models on the contribution of CC residues to soil coverage and P nutrition of subsequent crops. EEA General Villegas Fil: Varela, María Florencia. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina Fil: Barraco, Miriam Raquel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria General Villegas; Argentina Fil: Gili, Adriana Anahi. Universidad Nacional de La Pampa. Facultad de Agronomía; Argentina. Fil: Taboada, Miguel Angel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos; Argentina Fil: Rubio, Gerardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Parque Centenario. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones en Biociencias Agrícolas y Ambientales; Argentina 2018-08-22T11:48:21Z 2018-08-22T11:48:21Z 2017-01 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/3139 https://dl.sciencesocieties.org/publications/aj/abstracts/109/1/317?access=0&view=pdf 0002-1962 1435-0645 https://doi.org/10.2134/agronj2016.03.0168 eng info:eu-repo/semantics/restrictedAccess application/pdf Agronomy journal 109 (1) : 317-326. (2017) |
| spellingShingle | Biomasa Plantas de Cobertura Fósforo Cero-labranza Forrajes Biomass Cover Plants Phosphorus Zero Tillage Forage Cultivos de Cobertura Varela, María Florencia Barraco, Miriam Raquel Gili, Adriana Anahí Taboada, Miguel Angel Rubio, Gerardo Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title | Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title_full | Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title_fullStr | Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title_full_unstemmed | Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title_short | Biomass Decomposition and Phosphorus Release from Residues of Cover Crops under No-Tillage |
| title_sort | biomass decomposition and phosphorus release from residues of cover crops under no tillage |
| topic | Biomasa Plantas de Cobertura Fósforo Cero-labranza Forrajes Biomass Cover Plants Phosphorus Zero Tillage Forage Cultivos de Cobertura |
| url | http://hdl.handle.net/20.500.12123/3139 https://dl.sciencesocieties.org/publications/aj/abstracts/109/1/317?access=0&view=pdf https://doi.org/10.2134/agronj2016.03.0168 |
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