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| Caminha,Fábio Olegário; Silva,Sila Carneiro da; Paiva,Adenilson José; Pereira,Lilian Elgalise Techio; Mesquita,Priscila de; Guarda,Vitor Del'Alamo. |
| O objetivo deste trabalho foi avaliar a sobrevivência e a estabilidade da população de perfilhos em pastos de capim-marandu (Brachiaria brizantha) submetidos à lotação contínua e à adubação nitrogenada. Os tratamentos corresponderam a três doses de nitrogênio (150, 300 e 450 kg ha-1) mais o controle (sem adubação), e as unidades experimentais (piquetes de 1.200 m²) foram dispostas segundo um delineamento de blocos completos ao acaso, com quatro repetições. Foram avaliados mensalmente as taxas de sobrevivência, o balanço entre morte e aparecimento de perfilhos entre morte e aparecimento de perfilhos e o índice de estabilidade da população de perfilhos, de janeiro de 2007 a abril de 2008, em cinco épocas. A taxa de sobrevivência, o balanço entre morte e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Nitrogênio; Perfilhamento; Persistência dapastagem. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000200013 |
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| Paiva,Adenilson José; Silva,Sila Carneiro da; Pereira,Lilian Elgalise Techio; Guarda,Vitor Del'Álamo; Pereira,Priscila de Mesquita; Caminha,Fábio Olegário. |
| The objective of this experiment was to evaluate the structural characteristics of young, mature and old tillers on continuously stocked marandu palisade grass maintained at 30 cm and fertilized with nitrogen. Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg/ha of N) plus control (no fertilization) and were assigned to experimental units (1,200-m² paddocks) according to a completely randomized block design, with four replications. Measurements were performed during fall/winter 2007 and summer 2008. During summer, young tillers showed longer leaves and shorter stems relative to old tillers. During fall/winter, young and old tillers showed shorter leaves, while mature and old tillers showed longer stems. Tiller age interfered... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Demographic profile of tiller population; Morphogenesis. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000100004 |
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| Pereira,Lilian Elgalise Techio; Paiva,Adenilson José; Silva,Sila Carneiro da; Caminha,Fábio Olegário; Guarda,Vitor Del'Álamo; Pereira,Priscila de Mesquita. |
| Acceleration of the growth rhythm of plants using nitrogen fertiliser alters the rates of physiological processes like growth and senescence and may cause significant changes in sward structure, interfering with plant and animal responses. The objective of this experiment was to evaluate sward structure of marandu palisadegrass (Brachiaria brizantha) maintained at 30 cm under continuous stocking and subjected to contrasting rhythms of growth from January 2007 to April 2008. These were generated using or not nitrogen fertiliser, and comprised four experimental treatments as follows: control (non-fertilised), 150, 300 and 450 kg ha-1 of N. Acceleration of the growth rhythm of plants was associated with increases in leaf and stem bulk density, and resulted in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herbage bulk density; Morphological composition; Grazing management; Nitrogen. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500006 |
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| Mesquita,Priscila de; da Silva,Sila Carneiro; Paiva,Adenilson José; Caminha,Fábio Olegário; Pereira,Lilian Elgalise Techio; Guarda,Vítor Del'Álamo; Nascimento Júnior,Domicio do. |
| The concept of sward target has been used recently to characterise grazing management practices, but its efficiency to monitor and control sward structure questioned since it corresponds to a single sward structural feature, usually sward surface height. The objective of this experiment was to evaluate sward structure and its patterns of variation throughout the year on continuously stocked marandu palisadegrass swards maintained at 30 cm and subjected to contrasting rhythms of growth from January 2007 to April 2008. Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg ha-1 of N) plus the control (no N fertilisation), and were allocated to experimental units according to a complete randomised block design, with four... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Nitrogen; Sward structure; Sward height; Grazing management. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100004 |
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| Paiva,Adenilson José; Silva,Sila Carneiro da; Pereira,Lilian Elgalise Techio; Caminha,Fábio Olegário; Pereira,Priscila de Mesquita; Guarda,Vitor Del'Álamo. |
| Knowledge regarding morphogenetic characteristics has contributed to the understanding of plant responses to variations in climatic conditions and management practices. However, the original framework has been developed for temperate grass species, and indicates no ontogenetic effect on the expression of morphogenetic traits. Similar information for tropical grass species is scarce, but not less important. This experiment aimed at evaluating the influence of tiller age on the morphogenetic characteristics of continuously stocked marandu palisadegrass swards maintained at 30 cm and fertilized with nitrogen (N). Treatments corresponded to three nitrogen application rates (150, 300 and 450 kg ha-¹ of N) plus the control (no fertilization) and were assigned to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Tiller age; Nitrogen; Morphogenetic characteristics. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000600003 |
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| Pereira,Lilian Elgalise Techio; Paiva,Adenilson José; Guarda,Vitor Del’Álamo; Pereira,Priscila de Mesquita; Caminha,Fábio Olegário; Silva,Sila Carneiro da. |
| Nitrogen fertiliser accelerates plant growth and increases herbage utilisation efficiency in continuously stocked temperate grass swards, indicating greater herbage production and harvest efficiency. There is no similar evidence, however, for tropical pastures. In this study we evaluated the morphogenetic responses, the patterns of defoliation and the efficiency of herbage utilisation of continuously stocked marandu palisade grass (Brachiaria brizantha (Hochst. ex A. Rich.) Stapf. cv. Marandu) maintained at 30 cm by cattle and fertilised with nitrogen. Treatments corresponded to four measures of nitrogen application (0, 150, 300 and 450 kg ha–1), and were assigned to experimental units (1,200 m2 paddocks) according to a randomised complete block design,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria brizantha; Grazing management; Leaf turnover; Frequency and severity of defoliation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200114 |
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