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| Registros recuperados : 343 | |
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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
22/09/2023 |
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Actualizado : |
22/09/2023 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
GIORELLO, D.; SBRISSIA, A. F.; SILVA, S. C. D |
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Afiliación : |
DIEGO GERMAN GIORELLO LEITES, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ANDRÉ FISHER SBRISSIA, Universidade do Estado de Santa Catarina, Lages, Brazil; SILA CARNEIRO DA SILVA, Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Zootecnia, Piracicaba (SP), Universidade de Sao Paulo, Sao Paulo, Brasil. |
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Título : |
Bahiagrass (Paspalum notatum CV. Inia Sepé) responses to defoliation intensities. |
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Fecha de publicación : |
2023 |
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Fuente / Imprenta : |
Grass and Forage Science, 2023: 1-10. https://doi.org/10.1111/gfs.12628 |
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DOI : |
10.1111/gfs.12628 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 9 December 2022, Revised 18 April 2023, Accepted 24 August 2023. -- Correspondence: Diego German Giorello Leites, Instituto Nacional de Investigación Agropecuaria (INIA), INIA Tacuarembó, Tacuarembó, Uruguay. Email: dgiorello@inia.org.uy -- FUNDING: Agencia Nacional de Investigación e Innovación (ANII); Instituto Nacional de Investigación Agropecuaria (INIA). |
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Contenido : |
Defoliation management is determinant of forage production and plant persistence. The objective of this study was to identify grazing suitability and stability of herbage production of INIA Sepé subjected to four intensities of defoliation (represented for sward canopies of 3, 10, 17 and 24 cm maintained constant through weekly cuts) and two rates of nitrogen fertilization (100 and 300 kg ha-1). The response variables studied were: botanical/morphological composition of the herbage mass, herbage accumulation, nutritive value, tiller population density (TPD), tiller weight (TW), leaf area index (LAI) and nitrogen nutrition index (NNI) and calculations performed relative to the tiller size x density compensation mechanism (SDC). Taller swards had smaller population of large tillers, with greater individual leaf area, showing a tiller x size density compensation response. Calculations indicated that the regression coefficient for the linear regression between TW and TPD in a log scale was close to -2.5, in agreement with the -5/2 self-thinning rule, with variable LAI and R (ratio between tiller leaf area and volume). The exception was during year 1 for the 100 kg N ha-1, when the regression coefficient was close to -1.5. During year 2 only one replication of the 3 cm and 100 kg N ha-1 did not follow the SDC line. LAI and herbage accumulation were positively correlated with the distance between points of log(TW) x log(TPD) and an hypothetical -3/2 SDC line (p<.0001). Paspalum notatum cv. INIA Sepé shows stability of herbage accumulation and ability to adjust tiller size and population density. © 2023 John Wiley & Sons Ltd. MenosDefoliation management is determinant of forage production and plant persistence. The objective of this study was to identify grazing suitability and stability of herbage production of INIA Sepé subjected to four intensities of defoliation (represented for sward canopies of 3, 10, 17 and 24 cm maintained constant through weekly cuts) and two rates of nitrogen fertilization (100 and 300 kg ha-1). The response variables studied were: botanical/morphological composition of the herbage mass, herbage accumulation, nutritive value, tiller population density (TPD), tiller weight (TW), leaf area index (LAI) and nitrogen nutrition index (NNI) and calculations performed relative to the tiller size x density compensation mechanism (SDC). Taller swards had smaller population of large tillers, with greater individual leaf area, showing a tiller x size density compensation response. Calculations indicated that the regression coefficient for the linear regression between TW and TPD in a log scale was close to -2.5, in agreement with the -5/2 self-thinning rule, with variable LAI and R (ratio between tiller leaf area and volume). The exception was during year 1 for the 100 kg N ha-1, when the regression coefficient was close to -1.5. During year 2 only one replication of the 3 cm and 100 kg N ha-1 did not follow the SDC line. LAI and herbage accumulation were positively correlated with the distance between points of log(TW) x log(TPD) and an hypothetical -3/2 SDC line (p<.0001). Paspalum no... Presentar Todo |
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Palabras claves : |
LAI; Paspalum notatum; Tiller density; Tiller size. |
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Asunto categoría : |
K01 Ciencias forestales - Aspectos generales |
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Marc : |
LEADER 02673naa a2200217 a 4500
001 1064315
005 2023-09-22
008 2023 bl uuuu u00u1 u #d
024 7 $a10.1111/gfs.12628$2DOI
100 1 $aGIORELLO, D.
245 $aBahiagrass (Paspalum notatum CV. Inia Sepé) responses to defoliation intensities.$h[electronic resource]
260 $c2023
500 $aArticle history: Received 9 December 2022, Revised 18 April 2023, Accepted 24 August 2023. -- Correspondence: Diego German Giorello Leites, Instituto Nacional de Investigación Agropecuaria (INIA), INIA Tacuarembó, Tacuarembó, Uruguay. Email: dgiorello@inia.org.uy -- FUNDING: Agencia Nacional de Investigación e Innovación (ANII); Instituto Nacional de Investigación Agropecuaria (INIA).
520 $aDefoliation management is determinant of forage production and plant persistence. The objective of this study was to identify grazing suitability and stability of herbage production of INIA Sepé subjected to four intensities of defoliation (represented for sward canopies of 3, 10, 17 and 24 cm maintained constant through weekly cuts) and two rates of nitrogen fertilization (100 and 300 kg ha-1). The response variables studied were: botanical/morphological composition of the herbage mass, herbage accumulation, nutritive value, tiller population density (TPD), tiller weight (TW), leaf area index (LAI) and nitrogen nutrition index (NNI) and calculations performed relative to the tiller size x density compensation mechanism (SDC). Taller swards had smaller population of large tillers, with greater individual leaf area, showing a tiller x size density compensation response. Calculations indicated that the regression coefficient for the linear regression between TW and TPD in a log scale was close to -2.5, in agreement with the -5/2 self-thinning rule, with variable LAI and R (ratio between tiller leaf area and volume). The exception was during year 1 for the 100 kg N ha-1, when the regression coefficient was close to -1.5. During year 2 only one replication of the 3 cm and 100 kg N ha-1 did not follow the SDC line. LAI and herbage accumulation were positively correlated with the distance between points of log(TW) x log(TPD) and an hypothetical -3/2 SDC line (p<.0001). Paspalum notatum cv. INIA Sepé shows stability of herbage accumulation and ability to adjust tiller size and population density. © 2023 John Wiley & Sons Ltd.
653 $aLAI
653 $aPaspalum notatum
653 $aTiller density
653 $aTiller size
700 1 $aSBRISSIA, A. F.
700 1 $aSILVA, S. C. D
773 $tGrass and Forage Science, 2023: 1-10. https://doi.org/10.1111/gfs.12628
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