|
|
|
|
| |
|
|
Martins,Clóvis David Medeiros; Schmitt,Daniel; Duchini,Paulo Gonçalves; Miqueloto,Tiago; Sbrissia,André Fischer. |
ABSTRACT: This study evaluated the leaf area index (LAI) recovery mechanisms and forage accumulation rates on the regrowth of different grass species subjected to different defoliation intensities. For that purpose, plots of Pennisetum clandestinum (kikuyugrass), Lolium multiflorum (annual ryegrass), and Avena strigosa (black oats) were defoliated from 20 to 80 % of their initial heights (25, 20, and 25 cm, respectively). At different increments in height, forage samples were collected to ground level and used to estimate tiller population density (TPD), leaf area per tiller (LA), and forage mass. From these data, we calculated the leaf area index (LAI), average leaf area index (aLAI), and average and instantaneous forage accumulation rate (FAR and IFAR,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grazing heights; Grazing management; Intermittent stocking; Sward targets. |
Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200504 |
| |
|
|
Martins,Clóvis David Medeiros; Schmitt,Daniel; Duchini,Paulo Gonçalves; Miqueloto,Tiago; Sbrissia,André Fischer. |
ABSTRACT: This study evaluated the leaf area index (LAI) recovery mechanisms and forage accumulation rates on the regrowth of different grass species subjected to different defoliation intensities. For that purpose, plots of Pennisetum clandestinum (kikuyugrass), Lolium multiflorum (annual ryegrass), and Avena strigosa (black oats) were defoliated from 20 to 80 % of their initial heights (25, 20, and 25 cm, respectively). At different increments in height, forage samples were collected to ground level and used to estimate tiller population density (TPD), leaf area per tiller (LA), and forage mass. From these data, we calculated the leaf area index (LAI), average leaf area index (aLAI), and average and instantaneous forage accumulation rate (FAR and IFAR,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grazing heights; Grazing management; Intermittent stocking; Sward targets. |
Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000200403 |
| |
|
|
Duchini,Paulo Gonçalves; Echeverria,Joilson Roda; Américo,Luana Fidelis; Guzatti,Gabriela Cristina; Cherman,Mariana Alejandra; Sbrissia,André Fischer. |
ABSTRACT: Cyclocephala flavipennis Arrow, 1914 (Coleoptera: Melolonthidae), popularly known as white grub, is an insect widely disseminated in the South Region of Brazil. Despite the frequent occurrence of this white grub in areas cultivated with winter cereals, it is generally not considered a pest, since it feeds on straw and dead plant material. However, in 2015 and 2016, this insect has been identified as the damage-causing agent in the perennial winter pastures in Lages, Santa Catarina, Brazil. Damage was observed in patches and caused reduction in root depth and mass, resulting in loss of vigor, accelerated senescence in aerial parts, and death of tillers in Festuca arundinacea Schreb. and Dactylis glomerata L. plants. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Damage; Dynastinae; Grass; Pest; Santa Catarina. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500153 |
| |
|
|
|