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| Pereira,Vinícius Valim; Fonseca,Dilermando Miranda da; Martuscello,Janaina Azevedo; Cecon,Paulo Roberto; Santos,Márcia Vitória; Braz,Thiago Gomes dos Santos. |
| The objective of this study was to evaluate the effect of different levels of nitrogen supply and plants densities in the productivity of mombasa guineagrass (Panicum maximum) in the period of establishment. The design was of completely randomized blocks, with 12 treatments and three repetitions, with four nitrogen supplies (absence of application, 80, 160 and 320 kg/ha.year) and three plant densities (9, 25 and 49 plants/m²). The plot was cut at 30 cm from the ground when the sward high intercepted 95% of light. The following items were evaluated: sward height at 95% light interception, interval and number of cuts, dry mass production, total dry mass of leaves, stems and dead material and the morphologic composition. Nitrogen increased the dry mass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Height; Light interception; Productivity. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500006 |
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| Pereira,Vinícius Valim; Fonseca,Dilermando Miranda da; Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Santos,Márcia Vitória; Cecon,Paulo Roberto. |
| Objetivou-se com este trabalho avaliar o efeito da adubação nitrogenada e da densidade de plantas nas características morfogênicas e estruturais do capim-mombaça (Panicum maximum Jacq. cv mombaça). O experimento foi realizado em delineamento de blocos casualizados, com 12 tratamentos e três repetições, com quatro doses de nitrogênio (0, 80, 160 e 320 kg/ha.ano) e em três densidades (9, 25 e 49 plantas/m²) nas quatro estações do ano. O corte foi realizado a 30 cm do nível do solo, quando o dossel atingia 95% de interceptação luminosa. Foram mensuradas as taxas de aparecimento foliar, senescência e alongamento foliar, filocrono, taxa de alongamento de pseudocolmo, número de folhas vivas, duração de vida das folhas, número de perfilhos totais por touceira e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adubação nitrogenada; Interceptação luminosa; Perfilho. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200010 |
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| Braz,Thiago Gomes dos Santos; Fonseca,Dilermando Miranda da; Freitas,Fabrício Paiva de; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino; Santos,Márcia Vitória; Pereira,Vinícius Valim. |
| The objective of this work was to evaluate effects of nitrogen fertilization and plant density on morphogenesis of Tanzania guinea grass. It was used a random block design with 12 treatments and two replications in a 4 × 3 factorial arrangement, with four doses of nitrogen (N) (without N application, 80, 160 or 320 kg/ha.year) and three plant densities (9, 25 or 49 plants/m²). Harvest was performed at 25 cm from the ground when the canopy intercepted 95% of the incident light. Rates of leaf appearance and pseudostem elongation were positively and linearly influenced by nitrogen, whereas phillochron and leaf life span were influenced linearly and negatively. Leaf elongation responded positively to two factors, whereas leaf senescence rate and number of live... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilization; Light interception; Morphogenetic characteristics; Structural characteristics; Panicum maximum. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700004 |
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| Braz,Thiago Gomes dos Santos; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino; Pereira,Vinícius Valim. |
| ABSTRACT: The objective of this study was to evaluate, through partial correlation analysis, the degree of association between herbage accumulation and morphogenetic traits of ‘Tanzania’ grass (Panicum maximum Jacq.) defoliated with 95% of light interception and fertilized with nitrogen, under different planting densities. The experiment was carried out in a randomized complete design with 12 treatments and two replicates, in a 4 × 3 factorial arrangement consisting of four nitrogen rates (0, 80, 160, and 320kg ha-1 Yr-1) and three planting densities (9, 25, and 49 plants m-2). Harvests were performed at 25cm above the soil, when the plots intercepted 95% of the incident light. The simple correlation coefficients between herbage accumulation and leaf and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen; Pasture management; Pearson correlation; Plant density. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000900402 |
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