Forage production and perennial root biomass in alfalfa under two cutting heights
This study evaluated the impact of cutting severity (4 vs. 10 cm cutting height) on forage production and biomass of perennial organs (root plus crown), in two contrasting winter dormant cultivars of lucerne (G6 vs. G10), defoliated more frequently than usually recommended, during the first year of...
| Main Authors: | , , |
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| Format: | Artículo |
| Language: | Inglés |
| Published: |
Ediciones INTA
2023
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/14642 https://ria.inta.gob.ar/forage-production-and-perennial-root-biomass-in-alfalfa/ https://doi.org/10.58149/s1hb-hw75 |
| _version_ | 1855485400784568320 |
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| author | Blain, Gabriel Assuero, Silvia Graciela Berone, German Dario |
| author_browse | Assuero, Silvia Graciela Berone, German Dario Blain, Gabriel |
| author_facet | Blain, Gabriel Assuero, Silvia Graciela Berone, German Dario |
| author_sort | Blain, Gabriel |
| collection | INTA Digital |
| description | This study evaluated the impact of cutting severity (4 vs. 10 cm cutting height) on forage production and biomass of perennial organs (root plus crown), in two contrasting winter dormant cultivars of lucerne (G6 vs. G10), defoliated more frequently than usually recommended, during the first year of life. The experiment was conducted in outdoor pots, under non-limiting water and nutritional conditions. Between November 5, 2014 and September 2, 2015, plants were cut approximately every 370 growing degree days (GDD) at the 4 and 10 cm in height. No differences were ob served between cultivars. Forage yield (biomass harvested above cutting height) was similar between plants cut at 10 and 4 cm in height. Plants cut at 10 cm in height showed higher perennial biomass than those cut at 4 cm. At the same time, plants cut at 10 cm quickly achieved perennial biomass levels higher than 3000 kg DM/ha, a value at which it is considered that partitioning to roots would not limit the aerial biomass production. Consequently, a management of defoliation that contemplates a higher post-cut foliar residual allows to reconcile the need for early use of lucerne pastures with the need to establish a vigorous perennial system during the year of establishment. |
| format | Artículo |
| id | INTA14642 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Ediciones INTA |
| publisherStr | Ediciones INTA |
| record_format | dspace |
| spelling | INTA146422023-06-29T10:59:12Z Forage production and perennial root biomass in alfalfa under two cutting heights Blain, Gabriel Assuero, Silvia Graciela Berone, German Dario Medicago sativa Producción Biomasa Corte Frecuencia de las Cosechas Production Biomass Cutting Harvesting Frequency Alfalfa Frecuencia de los Cortes Lucerne This study evaluated the impact of cutting severity (4 vs. 10 cm cutting height) on forage production and biomass of perennial organs (root plus crown), in two contrasting winter dormant cultivars of lucerne (G6 vs. G10), defoliated more frequently than usually recommended, during the first year of life. The experiment was conducted in outdoor pots, under non-limiting water and nutritional conditions. Between November 5, 2014 and September 2, 2015, plants were cut approximately every 370 growing degree days (GDD) at the 4 and 10 cm in height. No differences were ob served between cultivars. Forage yield (biomass harvested above cutting height) was similar between plants cut at 10 and 4 cm in height. Plants cut at 10 cm in height showed higher perennial biomass than those cut at 4 cm. At the same time, plants cut at 10 cm quickly achieved perennial biomass levels higher than 3000 kg DM/ha, a value at which it is considered that partitioning to roots would not limit the aerial biomass production. Consequently, a management of defoliation that contemplates a higher post-cut foliar residual allows to reconcile the need for early use of lucerne pastures with the need to establish a vigorous perennial system during the year of establishment. Este estudio evaluó, durante el primer año de vida, el impacto de la severidad del corte (4 vs. 10 cm de altura de corte) sobre la producción de forraje y la biomasa de los órganos perennes (raíz más corona) en dos cultivares de alfalfa contrastantes en latencia invernal (G6 vs. G10), defoliados con una frecuencia mayor a la recomendada habit ualmente. El experimento se realizó en macetas al aire libre, bajo condiciones hídricas y nutricionales no limitantes. Entre el 5 de noviembre de 2014 y el 2 de setiembre de 2015 se realizaron defoliaciones a 4 y 10 cm de altura, cada 370 grados día de crecimiento (GDD). No se observaron diferencias entre cultivares. La producción de forraje (bioma sa cosechada por encima de la altura de corte) fue similar entre plantas cortadas a 10 y 4 cm de altura. Las plantas cortadas a 10 cm de altura mostraron mayor biomasa perenne que las cortadas a 4 cm y alcanzaron rápidamente niveles de biomasa perenne superiores a 3000 kg MS/ha, valor a partir del cual se considera que la partición a raíces no limitaría la producción de biomasa aérea. En consecuencia, durante el primer año de implantación, aumentar la altura poscorte y dejar un mayor remanente foliar permitieron compatibilizar el objetivo de utilizar la pastura lo antes posible con el de formar rápidamente un vigoroso sistema de corona-raíz. EEA Anguil Fil: Blain, Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Assuero, Silvia Graciela. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina Fil: Berone, German Dario. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina Fil: Berone, German Dario. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina 2023-06-21T15:07:27Z 2023-06-21T15:07:27Z 2023-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14642 https://ria.inta.gob.ar/forage-production-and-perennial-root-biomass-in-alfalfa/ 0325-8718 1669-2314 https://doi.org/10.58149/s1hb-hw75 eng info:eu-repograntAgreement/INTA/PNPA-1126073/AR./Pasturas ecoeficientes y de bajo carbono en ganadería. info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Ediciones INTA RIA 49 (1) : 15-22. (abril 2023) |
| spellingShingle | Medicago sativa Producción Biomasa Corte Frecuencia de las Cosechas Production Biomass Cutting Harvesting Frequency Alfalfa Frecuencia de los Cortes Lucerne Blain, Gabriel Assuero, Silvia Graciela Berone, German Dario Forage production and perennial root biomass in alfalfa under two cutting heights |
| title | Forage production and perennial root biomass in alfalfa under two cutting heights |
| title_full | Forage production and perennial root biomass in alfalfa under two cutting heights |
| title_fullStr | Forage production and perennial root biomass in alfalfa under two cutting heights |
| title_full_unstemmed | Forage production and perennial root biomass in alfalfa under two cutting heights |
| title_short | Forage production and perennial root biomass in alfalfa under two cutting heights |
| title_sort | forage production and perennial root biomass in alfalfa under two cutting heights |
| topic | Medicago sativa Producción Biomasa Corte Frecuencia de las Cosechas Production Biomass Cutting Harvesting Frequency Alfalfa Frecuencia de los Cortes Lucerne |
| url | http://hdl.handle.net/20.500.12123/14642 https://ria.inta.gob.ar/forage-production-and-perennial-root-biomass-in-alfalfa/ https://doi.org/10.58149/s1hb-hw75 |
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